ESIEN05-04 - R-410A Sky Air Indoor_part2_tcm135-72767

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ESIEN05-04

Part 3 – Troubleshooting 3–1

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Part 3Troubleshooting

What is in this part? This part contains the following chapters:

Chapter See page

1–Troubleshooting 3–3

2–Error Codes 3–31

1–Error Codes: System Malfunctions 3–3

4–Additional Checks for Troubleshooting 3–53

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ESIEN05-04

3–2 Part 3 – Troubleshooting



ESIEN05-04 Troubleshooting


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1Part 3

1 Troubleshooting

1.1 What Is in This Chapter?

Introduction When a problem occurs, you have to check all possible malfunctions. This chapter gives a general ideaof where to look for malfunctions.

Not all repair procedures are described. Some procedures are considered common practice.

Overview This chapter contains the following topics:

Topic See page

1.2–General Troubleshooting Flowchart 3–4

1.3–Overview of General Problems 3–5

1.4–Procedure of Self-Diagnosis by remote control 3–20

1.5–Fault-diagnosis by Wired remote control 3–21

1.6–Fault-diagnosis by infrared remote control 3–22

1.7–Overview of Error Codes 3–26

1.8–Troubleshooting by LED Indications on the Indoor Unit 3–27

1.9–Troubleshooting by remote control Display / LED Display 3–28

1.10–Overview of the Indoor Safety Devices 3–30

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Troubleshooting ESIEN05-04


1.2 General Troubleshooting Flowchart

Find out the situation according to the following procedure when there is a request for service from thecustomer.

YESNO NO NO

NO

NO Cooling

Heating

NO

NO

YES

YES

YESRuns

Runs

Nomal

Nomal

Doesn't run

YES

YES

YES

NOYES

(Service work required)

OK.We'll be right over.

(S1989)

Troubleshooting by remotecontroller malfunctioncode.

Turn the power supplyswitch ON or replacethe fuse.

Wait untilpower failureis over.

Is there apowerfailure?

Doesn't run at allThe power supply switch isOFF or the switch's fuse isburnt.

Set the remotecontroller's temperaturesetting to:(1)Whencooling:Minimum(2)Whenheating:Maximum

The fan comes onbut thecompressordoesn't run.

Cooling starts butstops right away.

Is the remotecontroller's operationlamp blinking?

Is the remote controller'soperation lamp blinking?Machines equipped withwireless remote controllers only.

Is the operation lamp of theindoor unit's signal receivingsection blinking?

Is the operation lamp of theindoor unit's signal receivingsection blinking?

Units equipped with wirelessremote controller only.

Troubleshooting by remotecontroller malfunctioncode.

Ask for the charactercode of the malfunctioncode.

Refer to "Remote controller displaymalfunction code and contents".

Units equipped with liquidcrystal remote controllers only

Units equipped with wirelessremote controllers only

Is the remotecontroller's operationlamp blinking?

Try turning theOperation switch OFFand On.

The unit won't runagain for a whileafter stopping.

The unit runs butdoesn't cool theroom.

Is the operation lamp ofthe indoor unit's signalreceiving sectionblinking?

Measure the suction /disharge temperature.


Units equipped with wirelessremote controllers only

Did you allow 3 minutes toelapse after turning ON?

Is there something causing theindoor load to be large, such asan open window or door?

(Temperature differential=suction temperature - discharge temperature)


Operation isnormal.

Temperaturedifferential is 8~18˚C

The units runs butdoesn't heat theroom.

Measure the suction /discharge temperature.

Is there something causing theindoor heat load to be large, suchas an open window or door?

(Temperature differential=discharge temperature - suction temperature)

Operation isnormal.

Temperaturedifferential is 14~30˚C

(1) The operation circuit fuse isdisconnected or is making poor contact.

(2) The operation swich is broken or itscontact is defective.

(3) The high pressure switch is broken.(4) The fan motor's magnetic switch is

broken.(5) The fan motor's overcurrent relay is

being actuated or is broken.(6) The compressor's overcurrent relay is

broken.(7) The compressor's protective thermostat

is broken.(8) The electrical system insulation is

defective.

(9) The compressor's magnetic switch'scontact is defective.(10) The compressor is broken.

(11) Thermostat is broken.(12) The cool/heat selector is broken.(13) The operation switch is broken.(14) The compressor's magnetic swich is

broken.

(15) Over-charged with refrigerant.(16) Air is mixed inside the refrigerant

circuit.(17) The pressure switch is broken.(18) The outdoor unit fan motor's magnetic

switch is broken.(19) The outdoor unit fan motor's auxiliary

relay is broken.

(20) The outdoor unit's heat exchanger isdirty.

(21) There is something blocking theoutdoor unit's air flow.

(22) Malfunction of the outdoor unit's fan.

(23) The indoor unit's air filter is dirty.(24) The indoor unit's heat exhanger is

dirty.(25) There is something blocking the indoor

unit's air flow.(26) Malfunction of the indoor unit's fan.

(27) Overcurrent relay (for compressor)(28) Compressor's protective themostat(29) The causes for the overcurrent relay

(for compressor) being actuated are:(29)-1 Power supply voltage is lower than

prescribed.(29)-2 High pressure is too high.(29)-3 The power supply cord is too small.(29)-4 The compressor is broken.(30) The causes for the compressor's

protective thermostat(30)-1 Internal leak of the-4way valve

(No substantial difference betweensuction and discharge temperature.

(30)-2 Unsatisfactory compression fromthe compressor

(30)-3 Different kind of refrigerant is charged.(30)-4 Malfunction of the expansion valve(30)-5 Unsatisfactory refrigerant circulation

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11.3 Overview of General Problems

Overview

Equipment Condition Remedy

1 Equipment does not operate. See page 3-62 Fan operates, but compressor does not. See page 3-83 Cooling/heating operation starts but stops

immediately.See page 3-10

4 Equipment operates but does not provideheating.

See page 3-12

7 Equipment discharges white mist. See page 3-148 Equipment produces loud noise or shakes. See page 3-159 Equipment discharges dust. See page 3-16

10 remote control LCD displays “88.” See page 3-1711 Indoor swing flap does not operate. See page 3-18

12 Equipment emits odor. Room smell and cigarette odors accumu-lated inside the indoor unit are dischargedwith air. Inside of the indoor unit must becleaned.

13 Flap operates when power is turned on. It is normal. The flap initializes for accuratepositioning.

14 Change of operation mode causes flap tomove.

It is normal. There is a control function thatmoves the flap when operation mode ischanged.

15 Fan operates in “M” mode during heatingeven if remote control is set to “Low.”

It is normal. It is caused by the activation ofthe overload control (airflow shift control).

16 Flap automatically moves during cooling. It is normal. It is caused by the activation ofthe dew prevention function or ceiling soil-ing prevention function.

17 Indoor unit fan operates in “L” mode for 1minute in microcomputer-controlled drymode even if compressor is not operating.

It is normal. The monitoring function forci-bly operates the fan for one minute.

18 In simultaneous ON/OFF multi-systemsetup, indoor unit (sub) does not operate insync with the other indoor unit (main).

(Flat, fan, etc.)

It is normal. It is caused by a signal trans-mission lag.

19 Indoor unit fan operates after heating oper-ation stops.

It is normal. The fan operates in the “LL”mode for 60 to 100 seconds to dissipatethe residual heat in the heater.

20 Drain pump operates when equipment isnot operating.

It is normal. The drain pump continues tooperate for several minutes after equip-ment is turned off.

21 Horizontal swing sends air to differentdirections in cooling and heating even if itis set to the same position.

It is normal. The airflow direction in cool-ing/dry operation is different from that inheating/fan operation.

22 Flap remains horizontal even if it is set toSwing.

It is normal. The flap does not swing in thethermostat OFF mode.

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1.3.1 Equipment does not operate

Applicable Model All models of SkyAir series

Error DetectionMethod

Error GeneratingCondition

Possible Causes Q Fuse blown or disorder of contact in operation circuit

Q Faulty operation switch or contact point

Q Faulty high pressure switch

Q Faulty magnetic switch for fan motorQ Activation or fault of overcurrent relay for fan motor

Q Faulty overcurrent relay for compressor

Q Faulty compressor protection thermostat

Q Insufficient insulation in electric system

Q Faulty contact point of magnetic switch for compressor

Q Malfunction of compressor

Q Defective remote control or low batteries (wireless)

Q Check if address is set correctly on wireless R.C.

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1Troubleshooting

Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may beoccurred.

Possibly faulty electriccomponent

Turn on power switch or replacefuse.If high-harmonics circuit breakeris not used on invertercompressor, have the circuitbreaker replaced.Wait until power returns.

Normal. Equipment startsoperation 3 minutes later (3-minstandby).

Diagnose based on error codeon remote controller.

Normal. Equipment startsoperation 3 minutes later (3-minstandby).

Diagnose based on error codeon remote controller.

Check electric system.

Is powerswitch OFF or fuse for

power switchblown?

Isoperation lamp on

LCD remote controllerflashing?

Isoperation switch pressed

repeatedly?

Wirelessremote controller

Is operation lamp on indoorunit signal receiving

section flashing?

Isthermostat changed and

reset again?

Is there power failure?

NO

NO

NO

NO

NO

NO

YES

YES

YES

YES

YES

YES

(S2575)

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YES

YES

YES

NO

NO

YESNormal.(Thermostat OFF byoutdoor temperature)

Turn on the powerswitch or replace fuse.

NO

NO

YESReplace the magneticswitch or powertransistor.

Replace the PC board.

Replace thecompressor.

Check the thermistor.NO

Air sensor Indoor unitPC board

Outdoor unitPC board

Relay

Magneticswitch

COMP

Inputto PCboard

Inputto PCboard

OutputfromPCboard

eOutput from

relay ormicrocomputer

dOutput from

magneticswitch or SW

circuit ofpower

transistor

cOutput from

magneticswitch orU,V,W of

powertransistor

· Indoor unit fan runs at set airflow rate.· (In cooling operation)

When air thermistor ambient temperature is higher than set temperature· (In heating operation)

When air thermistor ambient temperature is lower than set temperature

Is the powerswitch OFF or the fuse for

power switchblown?

d

Is rated voltageoutput from the magnetic

switch or powertransistor?

e

Is rated voltage outputfrom the PC board?

Is the heatingswitch turned on at outdoor

temperature >30˚C

c

Is rated voltageapplied atthe compressor

terminals?

(S2576)

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1.3.3 Cooling/heating operation starts but stops immediately




Possible Cause Q Excess charge of refrigerant

Q Air intrudes into refrigerant system

Q Faulty pressure switch

Q Faulty magnetic switch for outdoor unit fan motorQ Faulty aux. relay for outdoor unit fan motor

Q Soiled heat exchanger of outdoor unit

Q There is an interfering item in air flow of outdoor unit

Q Malfunction of outdoor unit fan

Q Soiled air filter of indoor unit

Q Soiled heat exchanger of indoor unit

Q There is some interfering item in airflow of indoor unit

Q Malfunction of indoor unit fan

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1Troubleshooting


Diagnose based on theerror code on remote

controller

Malfunction of fan motorCheck the magnetic switchand aux. switch for fanmotorCleaning

Remove the disturbingitem

Cleaning of the heatexchanger

After vacuum drying,charge correct amount ofrefrigerant

Check the pressure switch

Possible causes as follows:∗ Refrigerant overcharge∗ Mixing of air in refrigerant

system∗ Faulty pressure switch

Does the fan rotate?

Is the filter soiled?

NO

NO

Isthe operation

lamp of remote controllerflashing?

Is theoperation lamp

of indoor unit photo-sensingsection flashing?

Is the type ofremote controller wired or

wireless?

Is there any itemdisturbing airflow?

Is the heatexchanger soiled?

YES

NO

YES

YES

YES

YES

Wireless

YES

Heating: Indoor unitCooling: Outdoor unit

wired

[ ]

(S1992)

NO

NO

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1.3.6 Equipment operates but does not provide heating






Q Faulty pressure switch

Q Faulty magnetic switch for outdoor unit fan motorQ Faulty aux. relay for outdoor unit fan motor

Q Soiled heat exchanger of outdoor unit

Q There is an interfering item in air flow of outdoor unit

Q Malfunction of outdoor unit fan

Q Soiled air filter of indoor unit

Q Soiled heat exchanger of indoor unit

Q There is some interfering item in airflow of indoor unit

Q Malfunction of indoor unit fan

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1Troubleshooting


Measure the temperature ofsuction air and supply air.Temperature difference =Suction air temp. – Supply airtemp.

Wait for a while.No abnormality

No abnormality

Additional unit installationshould be considered

After vacuum drying, chargecorrect amount of refrigerant.

Check each item

Check each item

Check each item

Temperaturedifference for heatingshould be between 14

and 30˚C.

Is the unitin defrost mode?

Is the operationcurrent less than specified

level?

Does theheat load increase after

installation of theunit?

YES

YES

YES

YES

YES

YES

∗ Incorrect selection of model∗ Affection of sunlight∗Affection of excessive fresh

air into room

Gas shortage possiblygenerates trouble.

∗ Clogged air filter∗ Soiled heat exchanger∗ Malfunction of indoor fan

motor (Refer error code “A6”)

∗ Refrigerant overcharge∗ Soiled heat exchanger∗ Short circuit of discharge air∗ Disturbing item in air flow∗ Malfunction of fan motor of

outdoor unit(Refer error code “E7”, “H7”)

∗ Insufficient compression ofcompressor∗ Insufficient circulation of

refrigerant∗ Faulty expansion valve

NO

NO

NO

Does indoorunit air flowrate down?

NO

Is the levelof high pressure lower

than normal level?

NO

NO

(S1995)

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1.3.7 Equipment discharges white mist




Possible Cause Q Humid installation site

Q Installation site is dirty and with dense oil mists.

Q Soiled heat exchanger

Q Clogged air filterQ Malfunction of fan motor

Troubleshooting


Normal

Remove the source of humidcondition.

Cleaning of heat exchangeris necessary.

Remove the source of oilmist or dust.

Cleaning of air filter

Check fan motor(Refer error code “A6”)

Normal(Fog is generated due todefrosting operation)

Is white fog comingout from the unit?

Is the heatexchanger of indoor

unit soiled?

Is the sitedusty or with dense

oil mist?

NONO

NO

Is theairflow rate too small?

NO

NO

YES

YES

YES

YES

Is the roomtemperature higher than

set value in coolingoperation?

YES

Continue unit operation.

It may be necessary toremove the source of humidcondition.

Dust or oil mists should beremoved.

Possible causes as follows∗ Clogged air filter∗

Malfunction of fan motor

Did the trouble generate onswitching to heating modeafter complete of defrostingduring heating?

(S1996)

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11.3.8 Equipment produces loud noise or shakes






Q Flushing noise due to refrigerant shortage. (Sound of shoo...)

Troubleshooting


Correction of installationReinforcement for ceilings orwalls

Insert shock absorber inmounting section, orstrengthen the mountingsection.

Normal. The sound is flushingnoise of gas (refrigerant)inside air conditioning unitInsert cushion materials to thepipe support such as saddle.

Normal. The noise is a soundgenerated at the time of gas(refrigerant) flow change orstopDisassemble and removeparts contact.

Normal. Operation sound ofdraining device

Correct piping manually or

attach a dead weight to pipe

Normal. Creak generates byshrinkage of resin parts due totemperature change.

Normal.

After vacuum drying, chargecorrect amount of refrigerant.

∗ Excess charge of refrigerant∗ Air intrudes into refrigerant

system∗ Flushing noise due to

refrigerant shortage. (Soundof shoo...)

NO

YES

YES

YES

YES

YES

Doesthe noise generate

with vibration of wholeceilings and

walls?

YES

NO

NO

NO

Doesthe noise generate

with vibration of unitmounting section?

Continuousslight noise of "shoo..."

during cooling or

defrosting

YES[Power supply side]

Is the piping secured?

Sound of"shoo..." generates

just after operation start orstop, or defrosting

start or stop.

NO

NO

Does thefan contact with other

parts?Sound of

"shoo..." generatesduring cooling or after

operationstop.

NO

NO

Does thepipe contact with

casing?Creak during

heatingand after operationstop

YES

NO

YES

YES

NO

Isthe noise

flushing sound frompressure reducing valve

or capillarytube?

YES

[Installation work side]

(S1997)

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1.3.9 Equipment discharges dust




Possible Cause Q Carpet

Q Animal's hair

Q Application (cloth shop,...)

Troubleshooting


Dust collected inside the indoorunit are blown out.Cleaning for inside of indoor unitis necessary.

Dust collected inside the indoorunit are blown out.Cleaning for inside of indoor unitis necessary.

Install air filter.

Doesthe trouble

generate at the timeof operation start again after

extended period ofoperation?

YES

YES

NO

NO

Is air filter equipped?

(S1998)

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11.3.10 remote control LCD displays " 88 "




Possible Cause

Troubleshooting


The unit is checking to confirmthat remote controller is normal.Indication appears for short time.

Turn the switch to "Normal", andreset power supply.

Check the unit based onindoor unit LED and outdoorunit LED. (Trouble Shooting)

Troublegenerates just after power

supply ON

YES

YES

NO

NO

Is theposition of (SS 1) onindoor unit PCB at

"Emergency"?

(S1999)

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1.3.11 Swing flap does not operate

Applicable Models FUQ, FHQ, FAQ100

Method ofMalfunctionDetection

Utilizes ON/OFF of the limit switch when the motor turns.

MalfunctionDecisionConditions

When ON/OFF of the micro switch for positioning cannot be reversed even through the swing flapmotor for a specified amount of time (about 30 seconds).

Remark Some functions can force the swing flap into a fixed position, altough swing mode is selected on theremote control. This is not an unit error, but a control function to prevent draft to the customer.

Before starting the troubleshooting, make sure the swing flap is not forced into such a fixed position.(e.g. Hot start, defrost operation, thermostat OFF in heating operation or freeze prevention in coolingoperation. For details see "Fan and Flap Operations" on page 2-22 )

Possible Causes Q Faulty swing motor

Q Faulty micro switch

Q Faulty connector connection

Q Faulty indoor unit PC board

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1Troubleshooting


Connect correctly.

Connect correctly.

Does the flap swing?

Is continuity/nocontinuity reversed?

YES

NO

NO

YES

YES

YES

Replace the indoor unitPC board.

Replace the swingmotor assembly.

NO

220 - 240 VAC?NO

YES

NO

(S2577)

Isthe limit

switch’s transferconnector correctly

connected?

Turn the power supply off onceand back on, and checkwhether the swing flap motorswings when the power supplyis turned back on.

Disconnect X14A, turn thepower supply off once and backon, and check if the limit switchhas continuity when the powersupply it turned back on.

Turn the power supply off onceand back on, and measure theoutput voltage of connectorX29A when the power supply isturned back on.

Arethe connectors

correctly connected toX29A and X14A on

the PC board?

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1.4 Procedure of Self-Diagnosis by remote control

The inspection/testbutton

The following modes can be selected by using the [Inspection/Test Operation] button on theremote control.

Indoor unit settings can be made.Q Filter sign timeQ Air flow directionQ Others

Service data can be obtained.Q Malfunciton code historyQ Temperature data of various sections

Service settings can be made.Q Forced fan ONQ Air flow direction/volume setting

Depress Inspection/Test Operationbutton for more than 4 seconds.

Following codes can be checked.Q Malfunction codesQ Indoor model codeQ Outdoor model code

Press Inspection/Test Operation button once.

Press Inspection/Test Operation button once.

Press Inspection/Test Operation button once.Or after 30 minutes.

Depress Inspection/Test Operationbutton for more than 4 seconds.

Press Inspection/Test Operationbutton once.

After 10 seconds

Thermostat is forcibly turned on.

Localsettingmode

Servicemode

Normalmode

Inspectionmode

Testoperation

mode

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11.5 Fault-diagnosis by Wired remote control

Explanation If operation stops due to malfunction, the remote control’s operation LED blinks, and malfunction codeis displayed. (Even if stop operation is carried out, malfunction contents are displayed when inspection

mode is entered.) The malfunction code enables you to tell what kind of malfunction caused operationto stop. See page 3-26 for malfunction code and malfunction contents.

Inspection / test button

Inspection display Malfunction code

Indoor unit No. in whicha malfunction occurs

Operation lamp

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1.6 Fault-diagnosis by infrared remote control

Introduction Contrary to the wired remote control, the infrared remote control does not display the error code.Instead, the operation LED on the light reception section flashes.

Checking To find the error code, proceed as follows:

Step Action

1 Press the INSPECTION/TEST button to select “inspection”. The equipment enters theinspection mode. “0” flashes in the UNIT No. display.

0

INSPECTION/TEST

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12 Press the UP or DOWN button and change the UNIT No. until the receiver of the remote

control starts to beep.

3 Press the MODE selector button.The left “0” (upper digit) indication of the error codeflashes.’

Step Action

If you hear... Then...

3 short beeps Follow all steps below.

1 short beep Follow steps 3 and 4. Continue theoperation in step 4 until you hear a con-tinuous beep. This continuous beepindicates that the error code is con-firmed.

1 continuous beep There is no abnormality.

UPDOWN

MODE

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4 Press the UP or DOWN button to change the error code upper digit until the receiver ofthe remote control starts to beep.

5 Press the MODE selector button.The right “0” (lower digit) indication of the error codeflashes.

Step Action

If you hear... Then...

2 short beeps The upper digit matches.

1 short beep No digits match.

1 continuous beep Both upper and lower digits match.

UPDOWN

UP

DOWN

MODE

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16 Press the UP or DOWN button and change the error code lower digit until the receiver of

the remote control generates a continuous beep.

7 Press the MODE button to return to normal status. If you do not press any button for atleast 1 min, the remote control returns automatically to normal status.

Step Action

UPDOWN

UP

DOWN

MODE

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1.7 Overview of Error Codes

Q In the case of the shaded error codes, “inspection” is not displayed. The system operates, but besure to inspect and repair it.

Notes: 1 There is a possibility of open phase power supply, check power supply also.

2 Operation when a malfunction occurs may differ according to the model.

Malfunction Code Contents/Processing RemarksA1 Failure of PC board ass’y for indoor unitA3 Malfunction of drain water level systemA6 Indoor unit fan motor overload / overcurrent / lock (Note 1)AF Abnormal drain water level Activation of float switch during compressor off.AJ Failure of capacity setting Either capacity data is set incorrectly, or capacity

has not been set for the data ICC4 Malfunction of heat exchanger temperature

sensor systemC5 Malfunction of gas piping temperature sensor

systemC9 Malfunction of suction air temperature sensor

systemCC Malfunction of humidity sensor system FCQ-D only.CJ Malfunction of remote control air temperature

sensor system

Failure of remote control air thermistor.

Unit can be operated by indoor unit thermistor.U4/UF Failure of transmission (between indoor andoutdoor unit)

Transmission between indoor and outdoor unit isnot being correctly carried out. (Note 1, Note 2)

U5 Failure of transmission (between indoor unit andremote control)

Transmission between indoor and remote controlis not being correctly carried out.

U8 Failure of transmission (between “main” and“sub” remote control

Transmission between “main” and “sub” remotecontrol is not being correctly carried out.

UA Failure of fieldsetting System fieldsetting error pair, twin, triple, doubletwin or wrong capacity class.

UC Address error of central remote control

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11.8 Troubleshooting by LED Indications on the Indoor Unit

Foreword Troubleshooting can be carried out by service monitor LED (green). (Blinks when normal)

w : LED on / x : LED off / c : LED blinks / — : No connection with troubleshooting

Notes: 1 When the INSPECTION/TEST button of remote control is pushed, INSPECTION display blinksentering INSPECTION mode.

2 In the INSPECTION mode, when the ON/OFF button is pushed and held for 5 seconds or more,the aforementioned malfunctioning history display is off. In this case, after the malfunction codeblinks 2 times, the code display turns to “00” (=Normal) and the unit No. turns to “0”. TheINSPECTION mode automatically switches to the normal mode (set temperature display).

3 Operation halts due to malfunction depending on the model or condition.

4 If LED-B is off, the transmission wiring between indoor and outdoor unit may be incorrect ordisconnected. Before performing the previously described troubleshooting, check the transmissionwiring.

5 Troubleshoot by turning off the power supply for a minimum of 5 seconds, turning it back on, andthen rechecking the LED display.

MicrocomputerNormal Monitor

TransmissionNormal Monitor Contents/Processing

HAP (LED-A) HBP (LED-B)

c c Indoor unit normal → Outdoor unit trouble shooting

c w Incorrect transmission wiring between indoor and out-door unit

x If outdoor unit’s LED-A is off, proceed outdoor unit’strouble shooting. If outdoor unit’s LED-A blinks, failure ofwiring or indoor or outdoor unit P.C board ass’y. (Note 4)

w — Failure of indoor unit PC board ass’y (Note 5)

x Malfunction of power supply or failure of PC board ass’yor broken transmission wire between indoor and outdoorunit. (Note 5)

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1.9 Troubleshooting by remote control Display / LED Display

Explanation forSymbols

c : LED blinks / w : LED on / x : LED off / — : No connection with troubleshooting

: High probability of malfunction{ : Possibility of malfunction

: Low probability of malfunction — : No possibility of malfunction (do not replace)

1.9.1 Indoor Malfunctions

Indoor

Unit Mal-functions

Indoor Unit

LED DisplayNote 2

remote

controlDisplay

Location of Malfunction Contents of Malfunction Details of

Malfunction(ReferencePage)

H1P H2P Otherthan PCBoard

PC Board

Out-doorUnit

IndoorUnit

remotecontrol

c c *Note 1 — — — — Normal → to outdoor unit —c w A1 — — { — Malfunction indoor unit PC

board (For troubleshoot-ing by LED, refer to p. 27 .)

3–32c x

w —x —c c A3 — — — Malfunction of drain water

level system3–33

c c AF — — — Malfunction of drain sys-tem

3–35

c c A6 — — Indoor unit fan motor lock 3–36c c AJ — { — Malfunction of capacity

setting3–38

c c C4 — — Malfunctioning heatexchanger thermistor sys-tem.

3–40

c c C5 — — Malfuncioning gaspipethermistor system.

3–40

c c C9 — — Malfunctioning suction airthermistor system.

3–40

c c CC — — — — Malfunctioning of humiditysensor system

3–43

c c CJ — — — Malfunctioning remotecontrol air thermisto

3–42

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3

4

5

11.9.2 System Malfunctions

Outdoor Unit

Malfunction

remote

controlDisplay

Location of Malfunction Contents of Malfunction Details of

Malfunction(Reference

Page)

Otherthan PCBoard

PC Board

OutdoorUnit

IndoorUnit

remotecontrol

U4or UF

{ { — Transmission error (betweenindoor and outdoor unit)

3–4

U5 — { { Transmission error (betweenindoor and remote control)

3–6

U8 — { { Transmission error between“main” remote control and “sub”remote control

3–7

UA — { — Excessive indoor units connectedto this system.

3–8

UC — — { Centralized address setting error 3–10

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1.10 Overview of the Indoor Safety Devices

Thermal protector Thermal fuse fan motor

Abnormal Reset (automatic)

FCQ35, 50, 60, 71B >130°C +/-5°C <83°C +/-20°C N.A.

FCQ100, 125B >140°C +/-5°C <45°C +/-15°C N.A.

FCQ71, 100, 125, 140D N.A. N.A. N.A.

FFQ25, 35, 50, 60B >130°C +/-5°C <83°C +/-20°C N.A.

FBQ35, 50, 60, 71,100, 125B N.A. N.A. >152 +/-2°C

FDQ125, 200, 250B N.A. N.A. >160 °C

FHQ35, 50, 60, 71, 100, 125B >130°C +/-5°C <83°C +/-20°C N.A.

FUQ71, 100, 125B >130°C +/-5°C <83°C +/-20°C N.A.

FAQ71, 100B >130°C +/-5°C <83°C +/-20°C N.A.

FDEQ71, 100, 125B N.A. N.A. >152 +/-2°C

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ESIEN05-04 Error Codes


3

4

5

1

3

Part 3

2 Error Codes


Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code onthe remote control display. The error code helps you to find the cause of the problem.

Shutdown For some errors, the system only shuts down when the error occurs several times. This means thatyou have to wait until the system shuts down to be able to see the flashing LED on the front panel andthe error code on the remote control.


Topic See page

2.2–Malfunctioning Indoor PCB (A1) 3–32

2.3–Malfunction of Drain Water Level System (A3) 3–33

2.4–Malfunctioning Drain System (AF) 3–35

2.5–Indoor Unit Fan Motor Lock (A6) 3–36

2.6–Malfunctioning Capacity Setting (AJ) 3–38

2.7–Thermistor Abnormality (C4, C5, C9) 3–40

2.8–Malfunctioning remote control Air Thermistor (CJ) 3–42

2.9–Malfunctioning of Moisture Sensor System (CC) 3–43

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Error Codes ESIEN05-04


2.2 Malfunctioning Indoor PCB ( A1)

Error code A1

LED indications The table below shows the LED indications.

Error generation The error is generated when the data from the EEPROM is not received correctly.

EEPROM (Electrically Erasable Programmable Read Only Memory): A memory chip that holds itscontent without power. It can be erased, either within the computer or externally and usually requiresmore voltage for erasure than the common +5 volts used in logic circuits. It functions like non-volatileRAM, but writing to EEPROM is slower than writing to RAM.

Causes The possible cause is a malfunctioning indoor PCB.

Troubleshooting


Operation HAP (green) HBP (green)

Normal c c

Malfunctioning

c w

c x

w —

x —

Switch the power off and on again to restart.

The malfunction may be caused by anexternal factor, rather than damaged parts.Locate the cause and correct the situation.

Replaceindoor PCB.No

Yes

Normal reset?

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5

1

3

2.3 Malfunction of Drain Water Level System ( A3)

Error code A3


Error generation The error is generated when the water level reaches its upper limit and when the float switch turnsOFF.

Causes The possible causes are:

Q Malfunctioning drain pump

Q Improper drain piping work

Q Drain piping clogging

Q Malfunctioning float switch

Q Malfunctioning indoor unit PCB

Q Malfunctioning short-circuit connector X15 on PCB.


Normal c c

Malfunctioning c c

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Troubleshooting

Remark If "A3" is detected by a PC board which is not mounted with X15A, the PC board is defective.


Begin

Isthe unit a

cassette or built-intype?

Is

a drainpump connected tothe indoor unit PCB?

Doesthe drain pump

work after restartingoperation?

Is thedrain water

level abnormallyhigh?

Isthe float

switch connected toX15A?

220-240VAC?

Istherecontinuity?

Isthe

optional drainraising mechanism

connected?

Isthe

short-circuitconnector connected to X15A

on the indoor unitPCB?

Connect theShort-circuitconnector.

Replace theShort-circuitconnector

Set to"emergency" andcheck the voltage

of X25A.

Replace thedrain pump.

Remove the float switch fromX15A, short-circuit X15A, and

restart operation.

Replace indoor unit PCB.

There is a malfunctionof the drain system.

Replace floatswitch.

Replace theindoor unit PCB.

Connectfloat switch

Connect thedrain pump.


Check the continuity of theshort-circuit connector.

No

Yes

Yes

Yes

Yes Yes Yes

Yes

Yes

Yes

No No

Yes

No

No

No

No No

No

No

Yes

Does "A3"appear on the remote

controller display?

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4

5

1

3

2.4 Malfunctioning Drain System ( AF)

Error code AF


Error generation The error is generated when the float switch changes from ON to OFF while the compressor is OFF.


Q Error in the drain pipe installation

Q Malfunctioning float switch

Q Malfunctioning indoor unit PCB.

Troubleshooting



Normal c c

Malfunctioning c c

Iswa ter

dra ina ge s ys temnorm a l?

Isdra in-u p

kit ins ta lled?

Isdra in pu mp

norm a l?

Doe s dra inwa ter flow in rever s e

du ring non-oper a tion?

Is

a mo u ntof circ u la ted dr a in

wa ter exce ss ive a fterpu mp s top s

oper a tion?

Clogged dr a in wa ter di s ch a rges ys temClogged dr a in pu mpFau lty floa t s witch

Repl a ce indoor u nit PCB.Check to s ee if dr a in-u p heighta nd horizont a l pipe lengthexceed s pecific a tion s .

Check j u mper connector X15A.

Check dr a in p u mp a nd dr a inpipe.

Check w a ter dr a ina ge s ys tem.Check to s ee if dr a in-u p heighta nd horizont a l pipe lengthexceed s pecific a tion s .

Fau lty tra p in w a ter dr a ina ges ys tem

Repl a ce indoor u nit PCB.

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO

∗ In FHQ a nd FAQ pro b lem s ca n a ls oocc u r in the option a l dra in-u p kit.

Po ss ib le fa ilu re of flo a t s witch.Check to s ee if dr a in-u p heighta nd horizont a l pipe lengthexceed s pecific a tion s .

NOAre flo a ts witch a nd dr a in

pipe norm a l?

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2.5 Indoor Unit Fan Motor Lock ( A6 )

Error code A6


Error generation The error is generated when the fan rotations are not detected while the output voltage to the fan is atits maximum.


Q Malfunctioning indoor unit fan motor

Q Broken or disconnected wire

Q Malfunctioning contact



Normal c c

Malfunctioning c c

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4

5

1

3

Troubleshooting

Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may be

occurred.

Check theconnections of X20A

and X26A.

Check indoor unitfan motor andmotor wiring.

Are X20Aand X26A properly

connected?

Is there about 12VDC?

Connect X20Aand X26Acorrectly.

Unplug X26Aand switch the

power supply on.

Check the voltagebetween pins 1and 3 of X26A.


No

No

Yes

Yes

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2.6 Malfunctioning Capacity Setting ( AJ )

Error code AJ


Error generation The error is generated when the following conditions are fulfilled:


Q Malfunctioning capacity setting adapter connection


Capacity settingadapter

The capacity is set in the PCB’s memory IC. A capacity setting adapter that matches the capacity ofthe unit is required in the following case:

In case the indoor PCB installed at the factory is for some reason changed at the installation site, thecapacity will not be contained in the replacement PCB. To set the correct capacity for the PCB youhave to connect a capacity setting adapter with the correct capacity setting to the PCB. The capacitysetting for the PCB will become the capacity setting of the adapter because the capacity settingadapter has priority.


Normal c c

Malfunctioning c c

Condition Description

1 Q The unit is in operation.

Q The PCB’s memory IC does not contain the capacity code.

Q The capacity setting adapter is not connected.

2 Q The unit is in operation.

Q The capacity that is set, does not exist for that unit.

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4

5

1

3

Troubleshooting


Isthe

capacity settingadapter plugged intoX23A of the indoor

unit PCB?

Is "AJ"displayed on the remote

controller?

Plug a capacitor settingadapter that matches the

capacity of the unit into X23A.

The malfunction was caused by amissing capacity resistor.

Switch the power supply off andback on again.

Check if the capacity settingadapter is plugged into X23A of the

indoor PCB.


No

No

Yes

Yes

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2.7 Thermistor Abnormality ( C4, C5, C9 )

Error code The table below describes the two thermistor abnormalities.


Error generation The error is generated when during compressor operation:

Q Thermistor input > 4.96 V, or

Q Thermistor output < 0.04 V.


Q Malfunctioning connector connection

Q Malfunctioning thermistorQ Malfunctioning PCB

Q Broken or disconnected wire.

Checkingthermistors

See page 3–56 .

Error DescriptionC4 Malfunctioning heat exchanger thermistor system.

C5 Malfuncioning gaspipe thermistor system.

C9 Malfunctioning suction air thermistor system.


Normal c c

Malfunctioning c c

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4

5

1

3

Troubleshooting


Check the connector connection.

Replace outdoor unit PCB.

Isit

connectedproperly?

Isit normal?

Isthe

contact OK?

Check the thermistor resistance.

Check the contact betweenthermistor and PCB.

Correct contact

Replace thethermistor.

Correct theconnection.No

No

No

Yes

Yes

Yes

C4 : Indoor liquid pipe thermistor (R2T).C5 : Gaspipe thermistor (R3T)C9 : Air suction thermistor (R1T).

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2.8 Malfunctioning remote control Air Thermistor ( CJ )

Error code CJ


Error generation The error is generated when the remote control thermistor becomes disconnected or shorted while theunit is running.

Even if the remote control thermistor is malfunctioning, the system can operate with the systemthermistor.


Q Malfunctioning thermistor

Q Broken wire.

Troubleshooting



Normal c c

Malfunctioning c c

Turn the power supplyoff once andthen back on

Replace remote controller.

Could be outside cause(noise...) other thanmalfunction

NO

YES

Is"CJ"

displayed on theremote

controller?

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4

5

1

3

2.9 Malfunctioning of Moisture Sensor System ( CC)

Remotecontroller

display

CC

Applicablemodels

FCQ-D

Method ofmalfunctiondetection

Even if a malfunction occurs, operation still continues.Malfunction is detected according to the moisture (output voltage) detected by the moisturesensor.

Malfunctiondecisionconditions

When the moisture sensor is disconnected or short-circuited

Supposedcauses

Q Faulty sensor

Q Disconnection

Troubleshooting


Is the code"CC" displayed on the

remote controller?

Turn the power supplyoff once and back on.

Yes Replace the moisture sensor PCboard assembly (A4P).

Problem could be caused by externalfactor (noise, etc.) other than malfunction.

No

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ESIEN05-04

Part 4 – Commissioning and Test Run 4–1

4

3

4

5

4

Part 4Commissioning and TestRun


Chapter See page

2–Pre-Test Run Checks 4–11

3–Field Settings 4–17

4–Test Run and Operation Data 4–31

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ESIEN05-04

4–2 Part 4 – Commissioning and Test Run



ESIEN05-04 Error Codes: System Malfunctions


3

4

5

1Part 4

1 Error Codes: System Malfunctions


Introduction In the first stage of the troubleshooting sequence, it is important to correctly interpret the error code onthe remote control display. The error code helps you to find the cause of the problem.


Topic See page

1.2–Malfunction of Transmission between Indoor and Outdoor Unit (U4 or UF) 3–4

1.3–Malfunction of Transmission between Indoor Unit and remote control (U5) 3–6

1.4–Malfunction of Transmission between MAIN remote control and SUBremote control (U8)

3–7

1.5–Malfunctioning Field Setting Switch (UA) 3–8

1.6–Centralized Address Setting Error (UC) 3–10

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Error Codes: System Malfunctions ESIEN05-04


1.2 Malfunction of Transmission between Indoor and Outdoor Unit ( U4 or UF)

Error code U4 or UF

Error generation The error is generated when the microprocessor detects that the transmission between the indoor andthe outdoor unit is not normal over a certain amount of time.


Q Wiring indoor-outdoor transmission wire is incorrect

Q Malfunctioning indoor unit PCB

Q Malfunctioning outdoor unit PCB

Q Outside cause (noise...).

Troubleshooting 1 Diagnosis of incorrect or broken/disconnected wiring. If the LEDs on the indoor unit PC board are off,it indicates that the transmission wiring between indoor and outdoor units may be incorrect orbroken/disconnected.


Turn the power supply off once and then back on.

Check of indoor unitmicrocomputer normalHAP

Check of indoor unittransmission

malfunctionHBP

Failure of indoor unit PCB or malfunction of power supplysystem.

Resets normally.Could be outside cause (noise...).

Failure of indoor unit PCB.

Wire correctly.

YES

YES

YES

YES

YES

YES

NO

NO

NO

NO

NO (OFF)

NO (ON or OFF)

To outdoor unit(next page)

Is HAP flashing?

Is HAP flashing?

Isindoor-outdoor

transmission wireconnectedcorrectly?

Doesoutdoor unit

microcomputer normal H1P

flash?

Is H2P on?

Is H1P flashing?

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3

4

5

1Troubleshooting 2


Turn the power supplyoff once and then back on.

Turn off the power supply, disconnect the NO.2indoor-outdoor transmissionwire, and turn power supplyback on.

Failure of outdoor unit PCB.

Failure of indoor unit PCB.

Indoor PCB malfunction.


Failure of outdoor unit PCB or malfunction of power supply system.


YES

YES

YES

YES

YESCheck of outdoor unitmicrocomputer normal HAP

NO

NO

NO

NO (ON or OFF)

NO (OFF)

Continued fromprevious page

"U4" displaysconstantly?

Is HAP flashing?

Is HAP on?

Is HAP flashing?

Is HAP flashing?

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1.3 Malfunction of Transmission between Indoor Unit and remote control ( U5 )

Error code U5

Error generation The error is generated when the microprocessor detects that the transmission between the indoor unitand the remote control is not normal over a certain amount of time.


Q Malfunctioning remote control

Q Malfunctioning indoor PCB

Q Outside cause (noise...)

Q Connection of two master remote controls (when using two remote controls).

Troubleshooting


Set one of the remotecontrollers to SUB, turnoff the power supplytemporarily, then restartoperation.

Indoor unit PCBreplacement.

Malfunction could beproduced by noise.Check the surroundingarea and restartoperation.

Change todouble-coreindependent cable.

Failure of remotecontroller PCB or replacement of defective indoor unit PCB.

YES

YES

YES

YESYES

NO

NO

NO NO

Control by 2 remotecontrollers

All indoor unit PCB

microcomputer normal monitors

flashing

Usingmulticore

transmission wiringbetween indoor unit

and remotecontroller

SS1 of bothremote controllers is

set to MAIN.

Resetsnormally when

power supply is turnedoff temporarily.

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3

4

5

11.4 Malfunction of Transmission between MAIN remote control

and SUB remote control ( U8)

Error code U8

Error generation The error is generated when, in case of controlling with two remote controls, the microprocessordetects that the transmission between the indoor unit and the remote controls (MAIN and SUB) is notnormal over a certain amount of time.


Q Transmission error between MAIN remote control and SUB remote control

Q Connection among SUB remote controls

Q Malfunctioning remote control PCB.

Troubleshooting


Turn the SS-1 switch of oneremote controller to MAIN.Turn OFF the power supply,and restart operation.

Turn OFF the power once andrestart operation.Replace remote controller PCBif any error is generated.

Turn the SS-1switch of oneremote controller to MAIN.Turn OFF the power supply,and restart operation.

NO NO

YES YES

YES

NO

Controlling with2-remote controller

Both SS-1switches on remote

controllers are turnedto SUB

SS-1 switchon remote controller

PCB is turnedto MAIN

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1.5 Malfunctioning Field Setting Switch ( UA)

Error code UA

Error generation The error is generated when incorrect field settings have been set for pair/twin/triple/double twin.


Q Malfunctioning indoor or outdoor unit PCB

Q Malfunctioning power supply PCB

Q Indoor-outdoor, indoor-indoor unit transmission wiring

Q Malfunctioning remote control wiring.

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3

4

5

1Troubleshooting


Connect the remote controller correctly.

Check s etting "No. of Connected TwinS ys tem Indoor Unit s " of indoor u nit.

Repl a ce the tr a ns former.

Wiring co u ld b e incorrect, recheck.

Connect correctly.

Indoor u nit PCB repl a cement.

Oper a te s norm a lly.

Connect correctly.

Connect correctly.

S et correctly.

YES

YES

YES

YES

YES

YESYES

YES

YES

YES

NO

NO

NO

NO

NO NO

NO

NO

NO

NO

Is there220-240 VAC

between No.1 and No.3 of X2M (indoor Unit)?

Is the power supply PCB correctly

connected?

Is theindoor-indoor and

indoor-outdoor jumper correctly

connected?

Is theindoor-indoor and

indoor-outdoor jumper correctly

connected?

Is theoutdoor unit used for

Twin system?

Is the remotecontrol connected to

more thanone indoor

unit?

Are themicrocomputer normalmonitors (HAP) of all

indoor unit PCBflashing?

Are thetransmission normalmontiors (HBP) of all

indoor unit PCBflashing?

Operating normally?

Turn the power off once, thenback on, and restart operation.

Is the settingof Pair/Twin/Triple set

correctly?

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1.6 Centralized Address Setting Error ( UC)

remote controlDisplay

UC

Applicable Models All indoor unit models

Method ofMalfunctionDetection

Indoor unit microcomputer detects and judges the centralized address signal according to thetransmission between indoor units.

MalfunctionDecisionConditions

When the microcomputer judges that the centralized address signal is duplicated

Supposed Causes Q Faulty centralized address setting

Q Faulty indoor unit PC board

Troubleshooting


Are device s

rela ting to centr a lizedcontrol connected to the

indooru nit?

YES

NO

Ch a nge the s etting s o th a t the centr a lizeda ddre ss is not d u plica ted.

Repl a ce the indoor u nit PC b oa rd.

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ESIEN05-04 Pre-Test Run Checks


3

4

5

1Part 4

2 Pre-Test Run Checks


Introduction This chapter contains the following information:

Q Checks before test run

Q Test run checks

Q Setting the address for the receiver of the infrared remote control

Q Setting the address for the infrared remote control


Topic See page

2.2–Test Run Checks 4–12

2.3–Setting the infrared remote control 4–13

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Pre-Test Run Checks ESIEN05-04


2.2 Test Run Checks

Checks before testrun

Before carrying out a test run, proceed as follows:

Test run checks To carry out a test run, check the following:

Q Check that the temperature setting of the remote control is at the lowest level in cooling mode oruse test mode.

Q Go through the following checklist:

Step Action1 Make sure the voltage at the primary side of the safety breaker is:

Q 230 V ± 10%

2 Fully open the liquid and the gas stop valve.

Checkpoints Cautions or warnings

Are all units securely installed? Q Dangerous for turning over duringstorm.

Q Possible damage to pipeconnections.

Is the earth wire installed according to the applicablelocal standard?

Dangerous if electric leakage occurs.

Are all air inlets and outlets of the indoor and outdoorunits unobstructed?

Q Poor cooling.

Q Poor heating.

Does the drain flow out smoothly? Water leakage.

Is piping adequately heat-insulated? Water leakage.

Have the connections been checked for gas leakage? Q Poor cooling.

Q Poor heating.

Q Stop.

Is the supply voltage conform to the specifications onthe name plate?

Incorrect operation.

Are the cable sizes as specified and according to localregulations?

Damage of cables.

Are the remote control signals received by the unit? No operation.

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3

4

5

12.3 Setting the infrared remote control

Introduction To set the infrared remote control, you have to set the address for:

Q The receiver of the infrared remote control

Q The infrared remote control.

Setting the addressfor the receiver

The address for the receiver of the infrared remote control is factory set to 1. To change this setting,proceed as follows:

Step Action

1 Turn OFF the power.

2 Remove the sealing pad on the top of the receiver.

3 Set the wireless address switch (SS2) according to the table below. You can find the wire-less address switch attached on the PCB of the receiver and it is visible through the smallopening on the back of the receiver.

4 If you use a wired and a infrared remote control for one indoor unit, proceed as follows:

1. Set the wired remote control to MAIN: On the remote control.2. Set the infrared remote control to SUB: On the receiver with the MAIN/SUB switch

(SS1).

5 Seal off the opening of the address switch and the MAIN/SUB switch with the attachedsealing pad.

6 Make sure to also change the address on the remote control.

1 23

M

S S 2

S S 1

S

Sealing pad

Small opening

Receiver

1

2

1

2

1

2

3 3 3

Unit No.

SS2

No. 3No. 2No. 1

SM

SM

SS1

MAIN SUBMAIN/SUB

12

3M

S S 2

S S 1

S

Sealing pad

Small opening

Receiver

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Setting the addressfor the infraredremote control

The address for the infrared remote control is factory set to 1. To change this setting, proceed asfollows:

Step Action

1 Hold down the FILTER RESET button and the TEST button for at least 4 s, to go to fieldset mode. The display indicates the field set mode.

2 Press the FAN button to select a multiple setting (A/b), see ‘ Multiple settings A/b’ furtherin this section. Each time you press the button, the display switches between “A” and “b”.

FILTER RESET

TEST

FAN

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3

4

5

13 Press the UP and DOWN buttons to set the address. Set the same address as the

receiver (1, 2 or 3). The receiver does not work with addresses 4, 5 and 6.

4 Press the RESERVE button to confirm the setting.

Step Action

UPDOWN

RESERVE

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Multiple settingsA/b

When an outside control (central remote control...) controls an indoor unit, sometimes the indoor unitdoes not respond to ON/OFF and temperature settings commands from this controller.

5 Press the TEST button to quit the field set mode and return to the normal display.

Step Action

UPFAN

RESERVECANCEL

TIMER

DOWN

TEMPTIME

ON / OFF

MODE

SWING

/TEST

˚C

TEST

remote control Indoor unit

Setting remote control dis-play

Control of other air condi-tioners and units No other control

A: Standard All items are displayed. Commands other than ON/OFFand temperature settingaccepted. (1 long beep or3 short beeps emitted)

b: Multi Sys-tem

Only one item is dis-played. This item isonly shown for a fewseconds.

All commands accepted (2 short beeps)

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ESIEN05-04 Field Settings


3

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1Part 4

3 Field Settings



Q How to change the field settings

Q The field settings

Q The factory settings.


Topic See page

3.2–How to Change the Field Settings with the Wired remote control 4–18

3.3–How to Change the Field Settings with the infrared remote control 4–20

3.4–Overview of the Field Settings on the Indoor Units 4–21

3.5–Overview of the Factory Settings on the Indoor Units 4–22

3.6–Setting the Ceiling Height 4–23

3.7–Setting the Filter Counter 4–24

3.8–MAIN/SUB Setting when Using Two remote controls 4–26

3.9–Setting the Centralized Group No. 4–27

3.10–The Field Setting Levels 4–28

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Field Settings ESIEN05-04


3.2 How to Change the Field Settings with the Wired remote control

Installationconditions

The field settings have to be changed with the remote control according to the installation conditions.

Wired remotecontrol

The illustration below shows the wired remote control.

Components The table below contains the components of the wired remote control.

1293

25

22

11

10

37

35

27

26

121417

34

24520 211816 13 15 19

323130

29

28

4

36

33

823 76

No. Component No. Component

1 ON/OFF button 20 Air flow direction icon2 Operation lamp 21 Not available3 Operation mode icon 22 Fan speed icon4 Ventilation mode icon 23 Defrost/hotstart mode icon5 Ventilation icon 24 Air filter cleaning time icon6 Air cleaning icon 25 Element cleaning time icon7 Leave home icon 26 Ventilation mode button8 External control icon 27 Ventilation amount button9 Change-over under centralised control icon 28 Inspection/test operation button10 Day of the week indicator 29 Programming button11 Clock display 30 Schedule timer button12 Maximum set temperature 31 Time adjust button13 Minimum set temperature 32 Temperature adjust buttons14 Schedule timer icon 33 Operation change/ button15 Action icons 34 Setpoint/limit button16 Off icon 35 Fan speed button

17 Inspection required 36 Air flow direction adjust button18 Set temperature display 37 Air filter cleaning time icon reset19 Setting

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1Setting To set the field settings, you have to change:

Q “Mode No.”

Q “First code No.”

Q “Second code No.”.

To change the field settings, proceed as follows:

Step Action

1 Hold down the INSPECTION/TEST button for at least 4 s during normal mode to enterthe “Field setting mode”.

2 Press the TEMPERATURE CONTROL button until the desired “Mode No.” appears.

3 Q If the indoor unit is under group control, all settings for all the indoor units are set at thesame time. Use the codes 10 to 15 to apply this group control and proceed to the nextstep.

Q If you want to set the indoor units of one group individually or if you want to read outthe last settings, use the codes 20 to 25 which are displayed in brackets. Press theTIMER SELECTION button to select the “Indoor unit No.” for which you want to adjustthe field settings.

4 Press the upper part of the PROGRAMMING TIME button to select the “First code No.”.

5 Press the lower part of the PROGRAMMING TIME button to select the“Second code No”.

6 Press the CONFIRMATION button to confirm the changed setting.

7 Press the INSPECTION/TEST button to return to “Normal mode”.

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3.3 How to Change the Field Settings with the infrared remote control

Optionalaccessories

If optional accessories are mounted on the indoor unit, the indoor unit setting may have to be changed.

Refer to OH98-2 or the installation manual (optional handbook) for each optional accessory.

infrared remotecontrol

The illustration below shows the infrared remote control.

Setting To set the field settings, you have to change:

Q “Mode No.”

Q “First code No.”

Q “Second code No.”.

To change the field settings, proceed as follows:

RESERVE button

INSPECTION/TEST button

Mode No.Field setting mode

UP button

DOWN button

First code No.

Second code No.MODE button

Step Action


2 Press the MODE button to select the desired “Mode No.”.

3 Press the UP button to select the “First code No.”.

4 Press the DOWN button to select the “Second code No.”

5 Press the RESERVE button to set the present settings.

6 Press the INSPECTION/TEST button to return to the “Normal mode”.

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13.4 Overview of the Field Settings on the Indoor Units

Field settings The table below contains the possible field settings of all indoor units.

ModeNo.

Firstcode No. Description of the setting

Second code No.

01 02 03 04

10 or 20 0 Filter counter Lightcontamination

heavycontamination

— —

1 Filter type Long Super long External Oil mist

2 Remote thermistor of theremote control

TH1 = rem.controller

TH1 = airreturn

— —

3 Filter display Filter indic. No filter indic. — —

11 or 21 0 Number indoor to 1 outdoor Pair Twin Triple Double twin

1 Unified or indiv. set twin Group setting Indiv. setting — —

2 Fan OFF at thermostat OFF LL-speed OFF — —

12 or 22 0 KRP1B51/52/53 X1/X2 output ThermostatON

Option Operation Malfunction

1 EKRORO Forced OFF ON/OFF oper-ation

— —

3 Fan speed heating thermostatOFF

LL-speed Set speed ContinuouslyOFF

—

5 Automatic restart Disabled Enabled — —

13 or 23 0 Ceiling height setting Normal High Extra high —

≤ 2.7 m >2.7 ≤ 3.0 m >3.0 ≤ 3.5 m —

1 Selection of air flow direction(setting for when a blockingpad kit has been inst alled).

4-way flow 3-way flow 2-way flow —

3 Horizontal discharge grill Enabled Disabled — —

4 Air flow direction adjust rangesetting

Draft preven-tion

Standard Ceil soil pre-vention

—

5 Field fan speed changeover airoutlet (domestic only)

Standard Option 1 Option 2 —

6 External static pressure Normal High Low —

14 or 24 0 Additional timer to guard timer 0 s 5 s 10 s 15 s

1b(Only incase ofBRC1D52)

0 Permission level setting Level 2 Level 3 — —1 Leave home function Not

permittedPermitted — —

2 Thermostat sensor in remotecontrol (for limit operation andleave home function only)

Use Not use — —

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3.5 Overview of the Factory Settings on the Indoor Units

Factory settings The table below contains the factory settings of all indoor units

Mode No. First codeNo. Second code No.

FCQ FFQ FBQ FAQ FDQ,FEDQ

FUQ FHQ

10 or 20 0 01 01 01 01 01 01 01

1 01 01 01 — 02 01 —

2 02 02 02 — 02 02 02

3 01 01 01 01 01 01 01

11 or 21 0 01 01 01 01 01 01 01

1 01 01 01 01 01 01 012 01 01 01 01 01 01 01

12 or 22 0 01 01 01 01 01 01 01

3 01 01 01 — — — —

5 02 02 02 02 02 02 02

13 or 23 0 01 — — 01 — 01 01

1 01 01 — — — — —

3 — — — — — — —

4 02 02 — — — — —

5 01 01 — 01 — 01 01

6 — — 01 — — — —

14 or 24 0 01 01 01 — 01 01 01

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13.6 Setting the Ceiling Height

Incorrectly setting If you set the controller incorrectly, a connection mistake malfunction “ UA” will appear on the remotecontrol display.

See ’ Malfunctioning Field Setting Switch (UA) ’ on page 3–8 .

Mode No. 13 or 23First code No. 0

Set the second code No., according to the tables below.

FHQ

FAQ

FCQ and FUQ

Second code No. Ceiling-suspended type

01 Height < 2.7 m

02 2.7 m < height < 3.5 m

03 Not used

Second code No. Wall-mounted type

01 Normal

02 High

03 Extra high

Indoor unit Second code No. 4-way outlet 3-way outlet 2-way outlet

FCQ35-71 01 < 2.7 m < 3.0 m < 3.5 m

02 < 3.0 m < 3.3 m < 3.8 m

03 < 3.5 m < 3.5 m —

FCQ100-125-140 01 < 3.2 m < 3.6 m < 4.2 m

02 < 3.6 m < 4.0 m < 4.2 m

03 < 4.2 m < 4.2 m —

FUQ 01 < 2.7 m < 3.0 m < 3.5 m

02 < 3.0 m < 3.5 m < 3.8 m

03 < 3.5 m < 3.8 m —

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3.7 Setting the Filter Counter

Mode No. 10 or 20First code No. 0

When the filter counter indication time is set to ON, set the second code No., according to the tablebelow

Fan speed setting atthermostat OFF

When the cool/heat thermostat is OFF, you can stop the indoor unit fan by switching the setting to“Fan OFF”. This setting is used as a countermeasure against odour, for example for barber shops andrestaurants.

You can switch the fan speed to the set fan speed when the heating thermostat is OFF. This setting iscalled “Set Fan Speed” . Default the fan speed is set LL to prevent cold draft.Note: That a combination of modes 11 (21) and 12 (22) is required to enable following settings:

Unit Mode No. First code No. Second code No. Contamination

01 02

light heavy

FCQ

10 or 20 0

±2500 hrs ±1250 hrs

FFQ ±2500 hrs ±1250 hrs

FHQ ±2500 hrs ±1250 hrs

FUQ ±2500 hrs ±1250 hrs

FAQ ±200 hrs ±100 hrsFBQ ±2500 hrs ±1250 hrs

FDQ, FDEQ ±2500 hrs ±1250 hrs

Mode No. - First code No. Second code No.

01 02 03

Second

code No.

01 Cool: Set Speed

Head: LL Speed

Cool: Set Speed

Head: Set Speed

Cool: Set Speed

Head: Continu-ously OFF

02 Cool: OFF + moni-toring at set speed

Heat: OFF + moni-toring at LL speed

Cool: OFF + moni-toring at set speed

Heat: Set speed

Cool: OFF +moni-toring at set speed

Heat: OFF + moni-toring at OFF

12 (22) - 3

12 (21) - 2

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1Note: Monitoring mode

Air flow directionsetting

Set the air flow direction of the indoor units as given in the table below. This setting is needed whenthe optional air outlet blocking pad has been installed. The “Second code No” is factory set to “01”.

OFF

OFF

ON

ON

INDOORFAN

LL speed or set speed

THERMO

1 min 1 min

6 min 6 min

Mode No First code No Second code No Setting

13 or 23 1

01 F: four-direction air flow

02 T: three-direction air flow

03 W: two direction air flow

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3.8 MAIN/SUB Setting when Using Two remote controls

Situation The MAIN/SUB setting is necessary when one indoor unit is controlled by two remote controls. Whenyou use two remote controls (control panel and separate remote control), set one to MAIN and the

other to SUB. You can do this by setting the switch on the remote control’s PCB.

Setting The remote controls are factory set to MAIN, so you only have to change one remote control fromMAIN to SUB. To change a remote control from MAIN to SUB, proceed as follows:

Step Action

1 Insert a flathead screwdriver into the recess between the upper and lower part of theremote control, as shown in the i llustration below. Gently pry off the upper part of the con-troller, working from the two possible positions.

2 Turn the MAIN/SUB changeover switch on the PCB to “S”.

Upper part of the

remote control

Lower part of theremote control

SM

SM

The switch is set toMAIN (factory setting)

Set the switch to SUB.

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13.9 Setting the Centralized Group No.

When? If you want to carry out centralized control with a central remote control and a unified ON/OFFcontroller, you have to set the group No. for each group with the remote control.

Wired remotecontrol

The illustration below shows the wired remote control.

Setting To set the “Centralized group No.”, proceed as follows:

Individuallyaddress setting If the address must be set individually for each unit, set the “Mode No.” to “ 30 ”. For example, for powerconsumption counting.

SETTING

UNIT No.

GROUP

3

1

4

56 2

7

Unit N°

First Code N°

Second Code N°

Mode N°

Field set mode

Step Action

1 Switch ON the power supply of the central remote control, the unified ON/OFF controllerand the indoor unit(s).


3 Press the TEMPERATURE CONTROL button until “Mode No.” “ 00 ” appears.

4 Press the INSPECTION/TEST button to inspect the group No. display.

5 Set the “Group No.” for each group by pressing the PROGRAMMING TIME button.

The “Group No.” rises in the order of 1—00, 1—01, ..., 1—15, 2—00, ..., 2—15, 3—00,etc.The unified ON/OFF controller however displays only the range of group numbersselected by the switch for setting each address.

6 Press the CONFIRMATION button to enter the selected group No.

7 Press the INSPECTION/TEST button to return to normal mode.

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3.10 The Field Setting Levels

Introduction The three field setting levels are:

Q Inspection level

Q Monitoring level

Q Maintenance mode settings.

The inspection level The inspection level is the highest level of the three field setting levels. You can change the views inthe inspection level by pressing the INSPECTION/TEST button.

The flow chart below explains the different windows of the inspection level.

Normal display

Last occurredmalfunction

Indoor model and size

System

Test

Push INSPECTION/TEST button

See possible systemsettings.



PushINSPECTION/TEST

button


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1Possible systemsettings

The table below contains the possible system settings, which are displayed on the remote control ifthe TEST button is pushed twice shortly.

Changing the modesettings

To enter the monitoring level and to change the maintenance mode settings, proceed as follows:

SizeSoftware

Type

Settings Display Settings Display

35 35

5

FCQ FJ

45 45 FHQ HJ

60 63 FAQ AJ

71 71 FFQ GJ

100 100 FBQ JJ

125 125 FUQ 3J

200 200 FDQ, FDEQ UJ

250 250 —

Step Action

1 Hold down the INSPECTION/TEST button for at least 4 s to enter the field setting mode.

2 Hold down the INSPECTION/TEST button for at least 4 s to enter the maintenancemode.

3 Press the TEMPERATURE CONTROL buttons as many times as needed to select the

mode No. you want.4 Press the TIMER SELECTION button as many times as needed to select the unit No. you

want.

5 Carry out the settings for modes 44 and 45. See “ Maintenance Mode Settings ” further inthis section.

6 Press the CONFIRMATION button to confirm the settings of modes 44 and 45.

7 Press the INSPECTION/TEST button to return to the normal operating mode.

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Maintenance ModeSettings

The table below describes the maintenance mode settings.

Mode No. Function Content and operation method Example of the remote control display

40 History errorcodes

Display malfunction history

The history No. can be changed with the pro-gramming time button.

41 Thermistordata display

Select the display thermistor with the pro-gramming time button.

Thermistor:0. Remote control thermistor1. Suction thermistor2. Heat exchanger thermistor.

43 Forced fan ON Turns the fan ON for each unit individually.

44 Individualsetting

Sets fan speed and air flow direction for eachunit individually when using group control.

Settings are made using the “air flow direc-tion adjust” and “fan speed adjust” buttons.Confirmation by the confirmation button isrequired.

45 Unit No.change

Changes unit No.

Set the unit No. after changing with the pro-gramming time buttons.Confirmation by the confirmation button isrequired.

Past error code

Malfunctionhistory

* “00” displayed for 3 and subsequent

0: Newest

2: Oldest -

CODE SETTING

Unit No.

Unit No.

Thermistor

Temperature

SETTING

Unit No.

SETTING

Unit No.

SETTING

Fanspeed

1: Low3: High

Air flow direction

CODE

Unit No.

SETTINGCODE

Field set No

No after change

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ESIEN05-04 Test Run and Operation Data


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1Part 4

4 Test Run and Operation Data


Q General operation data


Topic See page

4.1–General Operation Data 4–32

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Test Run and Operation Data ESIEN05-04


4.1 General Operation Data

Guide Lines forOptimal Operation

Condition

The operation value guide lines when operating under standard conditions (at Rated frequency) bypushing the test run button on the remote control are as given in the table below.

Indoor Unit Fan: “H” Operation Compressor: Rated Frequency

HighPressure(Mpa)

LowPressure(Mpa)

DischargePipeTemperature(°C)

SuctionTemperature(°C)

Indoor UnitSide:DifferentialBetweenSuction Tem-perature andDischargeTemperature(°C)

Outdoor UnitSide:DifferentialBetweenSuction Tem-perature andDischargeTemperature(°C)

Cooling 26 bar ~34 bar 6 bar ~10 bar 60~100 –2~10 8~18 7~12

Heating 25 bar ~32.6 bar

5.3 bar ~9.5 bar

60~100 –6~2 14~30 2~6

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ESIEN05-04 Test Run and Operation Data


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1StandardConditions

During or after maintenance, when the power supply is turned back on, operation restartsautomatically by the “auto restart function.” Please exercise the proper caution.

When perfoming maintenance, you should at least perform the following inspections:

Indoor Unit Conditions Outdoor Unit ConditionsCooling Operation 27°C DB/19°C WB 35°C DB

Heating Operation 20°C DB 7°C DB/6°C WB

Indoor unit

Outdoor unit

Earth

Drain piping

Refrigerant piping

Transmission wiring betweenindoor and outdoor units

To dedicatedbreaker

Is the air filter dirty?

What about voltage and current?

What about switch capacity?What about cable thickness?

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Test Run and Operation Data ESIEN05-04


Correlation ofAir-Conditioner’sOperation Statusand Pressure /Running Current

What happens in comparison to normal values is summarized in the table below.(Measured from 15 ~ 20 minutes or more after operation starts.)

When Cooling

When Heating

Notes: Q ∗1. Water in the refrigerant freezes inside the capillary tube or expansion valve, and is basicallythe same phenomenon as pump down.

Q ∗2. Dirt in the refrigerant clogs filters inside the piping, and is basically the same phenomenon aspump down.

Q ∗3. Pressure differential between high and low pressure becomes low.

Air-Conditioner Status Low Pressure High Pressure Running Current

Air Filter Fouling Lower Lower LowerShort Circuit of Indoor UnitInlet/Outlet Air

Lower Lower Lower

Outdoor Unit Fin Fouling Higher Higher HigherShort Circuit of Outdoor UnitInlet/Outlet Air

Higher Higher Higher

Air Mixed in Refrigerant Higher Higher HigherWater Mixed in Refrigerant ∗1 Lower Lower LowerDirt Mixed in Refrigerant ∗2 Lower Lower LowerLack of Refrigerant (Gas) Lower Lower LowerUnsatisfactory Compression ∗3 Higher Lower Lower

Air-Conditioner Status Low Pressure High Pressure Running Current

Air Filter Fouling Higher Higher HigherShort Circuit of Indoor UnitInlet/Outlet Air

Higher Higher Higher

Outdoor Unit Fin Fouling Lower Lower LowerShort Circuit of Outdoor UnitInlet/Outlet Air

Lower Lower Lower

Air Mixed in Refrigerant Higher Higher Higher

Water Mixed in Refrigerant ∗1 Lower Lower LowerDirt Mixed in Refrigerant ∗2 Lower Lower LowerLack of Refrigerant (Gas) Lower Lower LowerUnsatisfactory Compression ∗3 Higher Lower Lower

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ESIEN05-04

Part 5 – Disassembly and Maintenance 5–1

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Part 5Disassembly andMaintenance


Chapter See page

1–Disassembly and Maintenance 5–3

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ESIEN05-04

5–2 Part 5 – Disassembly and Maintenance



ESIEN05-04 Disassembly and Maintenance


3

5

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5

Part 5

1 Disassembly and Maintenance


Introduction This chapter contains the following information on the indoor units:

Q Exploded views

Q Components

Q Disassembly procedures

Exploded views andcomponents

This chapter contains the following topics:

Dissassemblyprocedures

This chapter contains the following topics

Topic See page

1.2–FCQ35, 50, 60, 71B 5–4

1.3–FCQ100, 125B 5–6

1.4–FFQ25, 35, 50, 60B 5–8

1.5–FBQ35, 50B 5–10

1.6–FBQ60, 71B 5–12

1.7–FBQ100, 125B 5–141.8–FDQ125, 200, 250B 5–16

1.9–FDEQ71, 100B 5–18

1.10–FDEQ125B 5–20

Topic See page

1.11–FCQ71, 100, 125, 140D 5–22

1.12–FFQ25, 50, 60B 5–42

1.13–FHQ35, 50, 60, 71, 100, 125B 5–79

1.14–FUQ71, 100, 125B 5–94

1.15–FAQ71B 5–111

1.16–FAQ100B 5–122

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Disassembly and Maintenance ESIEN05-04


1.2 FCQ35, 50, 60, 71B

Exploded view The illustration below shows the exploded view.

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Components The table below contains the components of the exploded view.


B1 Heat exchanger assy E23 Drain pump

B1.1 Branch pipe (FCQ35) E24 Float switch

B1.1 Distributor with filter E25 Fan motor

B1.2 Single union joint F1 Casing assy

B1.3 Single union joint F6 Inspection cover assy

B1.4 Flare nut F8 Drain pan assy

B1.5 Flare nut F8.1 Drain plug

B1.6 Filter (not for FCQ71) F9 Sound absorbing material

C1 Fan rotor (turbo) F10 Heat exchanger blind plate assy

C2 Lock washer F11 Heat exchanger mounting plate

C3 Nut with washer F12 Hold plate assy

E1 Switch box assy F13 Panel mounting plate

E2 Switch box body F14 Drain pump mounting plate

E4 Bell mouth F15 Vibration isolator

E5 Switch box cover assy 1 F16 Hexagon mounting bolt

E6 Switch box cover 2 F17 Vibration isolator

E7 PCB assy F18 Nut with washerE7.1 Capac.setting adapt. (not for FCQ71) F19 Feeler bulb clamp

E8 Thermistor (Air) F20 Thermistor fixing plate

E9 Capacitor F21 Rubber bush

E10 Terminal F22 Inner heat insulator

E11 Terminal block G1 Drain hose

E12 Power supply transformer G2 Hose band

E14 Wire harness H1 Top tray assy

E15 Wire harness H2 Bottom tray assyE16 Wire harness K1 Drain hose assy

E19 Earth wire K2 Hose band

E20 Earth screw K3 Insulation for joint (liquid)

E21 Thermistor (liquid) K4 Insulation for joint (gas)

E22 Thermistor (coil) (not for FCQ71) K5 Sealing material

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1.3 FCQ100, 125B


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B1 Heat exchanger assy E25 Fan motor

B1.1 Distributor with filter F1 Casing assy

B1.2 Single union joint F6 Inspection cover assy

B1.3 Single union joint F8 Drain pan assy

B1.4 Flare nut F8.1 Drain plug

B1.5 Flare nut F9 Sound absorbing material

C1 Fan rotor (turbo) F10 Heat exchanger blind plate assy

C2 Lock washer F11 Heat exchanger mounting plate

C3 Nut with washer F12 Hold plate assy

E1 Switch box assy F13 Panel mounting plate

E2 Switch box body F14 Drain pump mounting plate

E4 Bell mouth F15 Vibration isolator

E5 Switch box cover assy 1 F16 Hexagon mounting bolt

E6 Switch box cover 2 F17 Vibration isolator

E7.1 PCB assy F18 Nut with washer

E7.1.1 Thermistor (Air) F19 Feeler bulb clamp

E9 Capacitor F21 Rubber bushE10 Terminal F22 Inner heat insulator

E11 Terminal block G1 Drain hose

E12 Power supply transformer G2 Hose band

E14 Wire harness H1 Top tray assy

E15 Wire harness H2 Bottom tray assy

E16 Wire harness K1 Drain hose assy

E19 Earth wire K2 Hose band

E20 Earth screw K3 Insulation for joint (liquid)E21 Thermistor (liquid) K4 Insulation for joint (gas)

E23 Drain pump K5 Sealing material

E24 Float switch

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1.4 FFQ25, 35, 50, 60B


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B1 Heat exchanger assy E21 Lock metal

B1-1 Header assy E22 Single phase AC fan motorB1-1-1 Single union joint 3/8

(Only for FFQ25 and FFQ35)E23 Vibro-isolating bolt

E24 Vibration isolator

B1-1-1 Single union joint 1/2(Only for FFQ50 and FFQ60)

E25 Drain pump ASSY

E25-1 Drain pump

B1-2 Liquid pipe assy E25-2 Drain pump mounting plate

B1-2-1 Distributor E25-3 Mounting bolt

B1-2-2 Single union joint 1/4 E25-4 Rubber vibration isolator

B3 Flare nut E26 Float switch mounting plate assy

B4 Flare nut E26-1 Float switch mounting plateC1 Turbo fan rotor E26-2 Float switch assy

C2 Fan rotation stopper F1 Top plate assy

C3 Insulation nut F2 Front plate sealing assy

E1 Electric components assy F3 Localized die rear plate

E2 Switch box assy F4 Localized die rear plate

E3 Cover, switch box F5 Localized die rear plate

E4 Power transformer F6 Hanger metal assy

E5 Printed circuit assy F7 Blind plate assy

E5-1 Capacity setting adapter F7-1 Grounding wire

E6 Housing, printed circuit F7-2 Grounding screw

E7 Capacitor, fan Motor F7-3 Locking wire saddle

E8 Terminal block F8 H/E mounting plate

E9 Terminal block F9 Hold Plate assy

E10 Wire harness (transmission) F10 Bell mouth assy

E10-1 Fuse holder F11 Inner insulation top panel

E10-2 Fuse F12 Drain pan top assy

E11 Wire harness assy F12-1 Drain plug

E12 Wire harness assy (swing motor) F13 Thermistor mounting spring

E13 Relay harness for fan motor F14 Bushing

E14 Thermistor (for air) G1 Drain hose assy

E15 Thermistor assy K1 Internal drain hose

E15-1 Thermistor K2 Hose band

E16 Grounding screw K3 Insulation for joint (liquid)

E17 Grounding wire K4 Insulation for joint (gas)

E18 Grounding wire K6 Drain hose sealing material

E19 Wire clip K7 sealing material

E20 Wire clip

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1.5 FBQ35, 50B


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A c c e s s o r i e s

F a n a s s y

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1 Top plate assy 29 Plain washer

2 Right plate assy 30 Fitting bolt drain pump3 Left plate assy 31 Fan assy

4 Interchangeable plate 31.1 Fan top plate

5 Small bottom plate 31.2 Fan housing bottom

6 Large bottom plate 31.3 Fan housing top

7 Air outlet flange 31.4 Rotor assy

8 Center stay assy 31.4.1 Hexagon socket screw

9 Air filter holding plate assy 31.5 Fan motor

10 Stay for fan top panel assy 31.6 Fan motor stand

11 Fan side blind plate assy 31.7 Motor fixing plate assy

12 Cooler side blind plate assy 32 Switch box assy

13 Pipe setting plate assy 32.1 Switch box body

14 Swtich box cover assy 32.2 Switch box fixing plate

15 Drain pan setting plate 32.3 Terminal fixing plate

16 Drain socket cover assy 1 32.4 Option fixing plate left

17 Drain socket cover assy 2 32.5 Option fixing plate right

18 Hanger bracket 32.6 PCB assy

19 Drain pan assy 32.7 Air thermistor

19.1 Drain socket cap 32.8 Power supply transformer

20 Heat exchanger assy 32.9 Fan motor capacitor

20.1 Distributor with filter assy 32.10 Terminal for remote control

20.2 Single union joint 32.11 Terminal for power supply

20.3 Single union joint 32.12 Wire harness

20.4 Flare nut 32.13 Wire harness

20.5 Flare nut 32.14 Tie wrap with clip

21 Air filter assy 32.15 Capacity setting adapter

22 Service cover assy 33 Thermistor (liquid)

23 Drain pump fixing plate 34 Thermistor (coil)

24 Service cover cap assy 35 Thermistor fixing blade25 Drain pump 36 Metal clamp

26 Float switch 37 Drain hose

27 Drain hose assy 38 Insulation for joint (gas)

28 Vibration absorber 39 Insulation for joint (liquid)

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1.6 FBQ60, 71B


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1 Top plate assy 29 Plain washer

2 Right plate assy 30 Fitting bolt drain pump3 Left plate assy 31 Fan assy

4 Interchangeable plate 31.1 Fan top plate

5 Small bottom plate 31.2 Fan housing bottom

6 Large bottom plate 31.3 Fan housing top

7 Air outlet flange 31.4 Rotor assy

8 Center stay assy 31.4.1 Hexagon socket screw (FBQ60)

9 Air filter holding plate assy 31.5 Fan motor

10 Stay for fan top panel assy 31.6 Fan motor stand

11 Fan side blind plate assy 31.7 Motor fixing plate assy

12 Cooler side blind plate assy 32 Switch box assy

13 Pipe setting plate assy 32.1 Switch box body

14 Swtich box cover assy 32.2 Switch box fixing plate

15 Drain pan setting plate 32.3 Terminal fixing plate

16 Drain socket cover assy 1 32.4 Option fixing plate left

17 Drain socket cover assy 2 32.5 Option fixing plate right

18 Hanger bracket 32.6 PCB assy

19 Drain pan assy 32.7 Air thermistor

19.1 Drain socket cap 32.8 Power supply transformer

20 Heat exchanger assy 32.9 Fan motor capacitor

20.1 Distributor with filter assy 32.10 Terminal for remote control

20.2 Single union joint 32.11 Terminal for power supply

20.3 Single union joint 32.12 Wire harness

20.4 Flare nut 32.13 Wire harness

20.5 Flare nut 32.14 Tie wrap with clip

21 Air filter assy 32.15 Capacity setting adapter (FBQ60)

22 Service cover assy 33 Thermistor (liquid)

23 Drain pump fixing plate 34 Thermistor (coil) (FBQ60)

24 Service cover cap assy 35 Thermistor fixing blade25 Drain pump 36 Metal clamp

26 Float switch 37 Drain hose

27 Drain hose assy 38 Insulation for joint (gas)

28 Vibration absorber 39 Insulation for joint (liquid)

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1.7 FBQ100, 125B


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1 Top plate assy 31 Fan assy

2 Right plate assy 31.1 Fan top plate3 Left plate assy 31.2 Fan housing bottom

4 Interchangeable plate 31.3 Fan housing top

5 Small bottom plate 31.4 Rotor assy

6 Large bottom plate 31.5 Fan motor

7 Air outlet flange 31.6 Fan motor stand

8 Center stay assy 31.7 Motor fixing plate assy

9 Air filter holding plate assy 31.8 Rotor assy

10 Stay for fan top panel assy 31.8.1 Hexagon socket screw

11 Fan side blind plate assy 31.9 Shaft assy

12 Cooler side blind plate assy 31.10 Coupling

13 Pipe setting plate assy 31.11 Vibro proof rubber assy

14 Swtich box cover assy 31.12 Bearing board

15 Drain pan setting plate 31.13 Bearing fixing plate

16 Drain socket cover assy 1 32 Switch box assy

17 Drain socket cover assy 2 32.1 Switch box body

18 Hanger bracket 32.2 Switch box fixing plate

19 Drain pan assy 32.3 Terminal fixing plate

19.1 Drain socket cap 32.4 Option fixing plate left

20 Heat exchanger assy 32.5 Option fixing plate right

20.1 Distributor with filter assy 32.6 PCB assy

20.2 Single union joint 32.7 Air thermistor

20.3 Single union joint 32.8 Power supply transformer

20.4 Flare nut 32.9 Fan motor capacitor

20.5 Flare nut 32.10 Terminal for remote control

21 Air filter assy 32.11 Terminal for power supply

22 Service cover assy 32.12 Wire harness

23 Drain pump fixing plate 32.13 Wire harness

24 Service cover cap assy 32.14 Tie wrap with clip25 Drain pump 33 Thermistor (liquid)

26 Float switch 35 Thermistor fixing blade

27 Drain hose assy 36 Metal clamp

28 Vibration absorber 37 Drain hose

29 Plain washer 38 Insulation for joint (gas)

30 Fitting bolt drain pump 39 Insulation for joint (liquid)

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1 Top plate assy 6.22 Thermistor

2 Fan assy + fan mounting plate 6.23 Tie wrap with clip3 Side plate right 6.24 PCB assy

4 Side plate left 6.25 Power supply transformer

5 Service cover assy 6.26 Earth wire

6 Switch box assy 6.27 Insulation switch box

6.1 Switch box fixing plate 6.28 Insulation switch box

6.3 Terminal fixing plate 6.29 Insulation switch box

6.4 Magnetic contacor 7 Hook

6.6 Switch box body 8 Filter cover

6.7 Option fixing plate left 9 Fixture heat exchanger right

6.8 Option fixing plate right 10 Fixture heat exchanger left

6.9 Wire harness 11 By-pass sealing plate

6.10 Wire harness 12 Heat exchanger lassy

6.14 Wire harness 13 Drain pan assy

6.15 Wire harness 14 Bottom plate assy

6.16 Wire harness 15 Airfilter

6.17 Wire harness 16 Pipe fixing plate

6.18 PCB assy 17 Clamp

6.19 Locking guard spacer 18 Clamp

6.20 Terminal strip 19 Thermistor fixing

6.21 Thermistor

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1.9 FDEQ71, 100B


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1 Top plate assy 10 Discharge plate assy

2 Suction plate assy 11 Bottom assy3 Air filter 12 Filter holding plate

4 Fan assy 13 Hook

4.1 Fan top plate assy 14 Pipe support plate

4.2 Fan housing bottom (large) 15 Pipe sealing

4.3 Fan housing top (large) 16 Switch box assy

4.4.1 Rotor assy 16.1 Switch box cover assy

4.5 Fan motor assy 16.2 Switch box mounting plate assy

4.6 Fan motor stand 16.3 Resin case

4.7 Motor fixing plate assy 16.4 PCB assy

4.8 Capacitor 5 microf 16.5 Transformer

4.9 Cable holder 16.6 Terminal board

4.15 Hexagon socket screw 16.7 Terminal strip

5 Right side plate assy 16.8 Tie wrap with clip (L=140)

6 Left side plate assy 16.9 Wire harness (X2M - X27A)

7 Heat exchanger assy 16.10 Wire harness (X1M - X5A)

7.1 Distributor with filter assy 16.11 Blind rubber butching

7.2 Single union joint 3/8 16.12 Thermistor (air)

7.3 Flare nut 3/8 16.13 Thermistor (liquid)

7.4 Single union joint 5/8 17

7.5 Flare nut 5/8 18

8 Drain pan sealing assy 19

9 Drain pan fixing 20

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1.10 FDEQ125B


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1 Top plate assy 7.5 Flare nut 5/8

2 Suction plate assy 8 Drain pan sealing assy3 Air filter 9 Drain pan fixing

4 Fan assy 10 Discharge plate assy

4.1 Fan top plate assy 11 Bottom assy

4.2 Fan housing bottom (small) 12 Filter holding plate

4.3 Fan housing top (small) 13 Hook

4.4.1 Rotor assy 14 Pipe support plate

4.4.2 Rotor assy 15 Pipe sealing

4.4.2 Rotor assy 16 Switch box assy

4.5 Fan motor assy 16.1 Switch box cover assy4.6 Fan motor stand 16.2 Switch box mounting plate assy

4.7 Motor fixing plate assy 16.3 Resin case

4.8 Capacitor 5 microf 16.4 PCB assy

4.9 Cable holder 16.5 Transformer

4.10 Bearing board 16.6 Terminal board

4.11 Vibro proof rubber assy 16.7 Terminal strip

4.12 Bearing fixing plate 16.8 Tie wrap with clip (l=140)

4.13 Shaft assy 16.9 Wire harness (X2M - X27A)

4.14 Cuppling 16.10 Wire harness (X1M - X5A)

4.15 Hexagon socket screw 16.11 Blind rubber butching

5 Right side plate assy 16.12 Thermistor (air)

6 Left side plate assy 16.13 Thermistor (liquid)

7 Heat exchanger assy 17

7.1 Distributor with filter 18

7.2 Single union joint 3/8 19

7.3 Flare nut 3/8 20

7.4 Single union joint 5/8

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1.11 FCQ71, 100, 125, 140D

Overview This part contains the following topics:

Topic See page

Removal of Suction Grille 5–23

Removal of Air Filter 5–24

Removal of Decoration Panel 5–26

Removal of Horizontal Blade 5–28

Removal of Swing Motor 5–29

Removal of Switch Box 5–31

Removal of PC Board 5–33

Removal of Humidity Sensor and Air Temperature Thermistor 5–35

Removal of Fan Motor 5–36

Removal of Drain Pan, Drain Pump, Float Switch 5–38

Removal of Heat Exchanger Temperature Thermistor 5–41

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1.11.1 Removal of Suction Grille

Warning Be sure to wait 10 minutes or more after turning off all power supplies before disassembling work.

Procedure:

Step Procedure Points

1 Removing the suction grille c Push the buttons and pull down1 Push the 2 buttons

simultaneously and pulthe suction grille downslowly.

Q When closing, push up thegrille slowly.

2 With the suction grilleopen at an angle of 45°,lift it up to remove it.

d Open te 45° Q Grille is attached with 3 hooks

Suction grille

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1.11.2 Removal of Air Filter


Procedure:


1 Removing the air filter1 Open the suction grille.

(Refer to the procedurefor removing the suctiongrille.)

2 Disengage the hooks ofthe air filter by pulling thefilter downward at anangle, and remove thefilter.

Air filter

Tab

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2 Mounting the air filter1 Hook the air filter on

projections at the top of2 Force the bottom of the

air filter into projections atthe bottom of the suctiongrille to secure the airfilter.


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1.11.3 Removal of Decoration Panel


Procedure:


1 Removing the decorationcovers in the corner ofdecoration panel

Q Remove a string (provided toprevent the decoration coverfrom dropping) from thedecoration cover in the cornerfrom the pin to dismount thedecoration cover.

1 To remove thedecoration covers in thecorner, pull the inside(suction grille side)down.

2 Remove the one screwto dismount the terminalblock box cover, thendisconnect theconnector for swingmotor.For the auto grille,disconnect the autogrille power supplycable from the powersupply terminal block.

3 Loosen the 4 retainingscrews from thedecoration panel.

4 The decoration panel iscaught on the 4 hooksof the main unit.

Decoration cover in the corner

Structure ofmounting fixture

Hook

Mountingfixture

Retaining screw

Terminal block box cover

Connector forswing motor

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5 Remove the 2 mountingfixtures on the outside(Section A), then removethe 2 mounting fixtures

on the inside (Section B).

6 Remove the decorationpanel.

Q Mounting the decorationcoverin the cornerMount the decoration cover sothat 4 hooks on the decorationcover canengage with the hole in thedecoration panel.


Decoration panel

Mounting fixture

Mounting fixture

Mounting fixture

String

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1.11.4 Removal of Horizontal Blade


Procedure:


1 Remove 4 screws each(16 screws in total) todismount the 4 sealmaterials.

2 Remove 2 screws each(16 screws in total) todismount the 8horizontal bladebearings.

Reassembling

Q Make sure that the air outletinsulation material (sealmaterial) is as shown below(may result in dewcondensation).

Seal material

Horizontalbladebearing

Swing motor

Horizontal blade

Air outlet insulation material

Sealmaterial

No catching or gap is allowed forthe seal material

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1.11.5 Removal of Swing Motor


Procedure:

Step Procedure Points1 Remove the decoration

cover in the cornerlocated right below therefrigerant piping.

2 Remove the 2 swingmotor mounting screws.

3 Disconnect the swingmotor connector.

Q The connector section isprotected with the use of

aluminum tape. Remove thealuminum tape.

Decoration cover in the corner

Swing motor

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Q Caution during swing motorinstallation

Q Protect the connector sectionwith using the aluminum tape.

1. After installing theswing motor, be sure to

turn off the powersupply for reset (forinitializing the vanepositions).

2 Be sure to engage thegears on the motor sideand panel side.(Improper gearengagement results infaulty swing operationand abnormal noise.)


Motor-side gear

Swing motor

Panel-side gear

Motor-side gear

Panel-side gear

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1.11.6 Removal of Switch Box


Procedure:

Step Procedure Points1 Remove the 2 mounting

screws on the switchbox cover.

2 Remove the 1 mountingscrew on the terminalblock cover.

3 Disconnect eachconnector

(7 connectors in total)connected to the insideof the switch box.

Q Transfer connector x3 pieces

Q Direct connector x 4pieces

Switch box cover

Terminal block boxcover

remote control

Moisture sensor

Heat exchangertemperaturethermistor Float switch

Drain pump

Swing motor

For powersupplyconnection Swing motor

Moisture sensor

remote control

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4 Disconnect theconnector for fan motor.

Q For FCQ71D : Directconnector

Q For FCQ100~140D: Relayconnector

5 Remove the groundingwire mounting screw.

6 Remove the switch boxfixing screw.

7 Tilt the switch box in thedirection shown by thearrow, then draw theentire switch box out.

(Status after removal)


Switch box fixing screw

Fan motor

Grounding wire

Inverter PC board(for RZP100~140D models only)

Power supply PC board

Control PC board

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1.11.7 Removal of PC Board


Procedure:Step Procedure PointsQ Remove the switch box

according to the procedurefor removing the switch box.

1 Remove 2 switch boxmounting screws toopen the box.

1 Disconnect the control PCboard.

1 Disconnect the 2connectors between thepower supply and

control PC boards, thendraw the control PCboard out in thedirection shown by thearrow.

2 Disconnect the inverter PCboard.1 Disconnect the harness

from the 2 tabsprovided in the box.

2 Draw the inverter PCboard out in thedirection shown by thearrow.

Tabs

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3 Disconnect the powersupply PC board.

1 Disengage the 3 tabson the front by pressing

the back of the PCboard in the directionshown by the arrow,then remove the powersupply PC board.


Tabs

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1.11.8 Removal of Humidity Sensor and Air Temperature Thermistor


Procedure:

Step Procedure PointsQ Remove the terminal block

box cover according to theprocedure for removing theswitch box.

1 Disconnect theconnector for humiditysensor.

Q The moisture sensor and airtemperature thermistor isintegrated.

2 Disengage the 3 tabs toremove the humidity

sensor.

Humidity sensor

TabsConnector Tab

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1.11.8 Removal of Fan Motor


Procedure:

Step Procedure PointsQ Remove the terminal block

box cover according to theprocedure for removing theswitch box, then disconnectthe following connectors.Transfer connectorz Wired remote controlz Swing motorz Humidity sensorConnector built in the

switch boxz Connector used forpower supply cables

1 Removing the bell mouth.1 Disconnect the 2 remote

control cables and 3power supply cables.

2 Disconnect the drainpump and float switchwiring from bell mouth.

(* 1)3 Remove the 5 mounting

screws on the bell mouth.* 1: At this time, do not cut theclamp material attached to thedrain pan near the switch box.Loosen the mounting screw toremove the clamp material.

For heat pump

For float switch

Remotecontrollercable

Power supply cable

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2 Removing the fan rotor.1 Remove the resin nut and

fan rotor retainer todismount the fan rotor.

3 Remove the fan motor.1 Disconnect the 2

connectors on the fanmotor.

2 Remove the nut withcollar and vibro-isolatingrunner to dismount thefan motor.


Fan rotor retainer

Resin nut

Vibro-isolatingrubber

Nut with collar

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1.11.10 Removal of Drain Pan, Drain Pump, Float Switch


Procedure:Step Procedure Points1 Removing the drain pan1 Remove the drain socket

cap to discharge water.2 Remove the 5 mounting

screws to pull the drainpan out downward.

Drain socket cap

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2 Removing the drain pump1 Cut the clamp material.2 Pull the drain hose out.3 Remove the 3 screws

on the drain pumpmounting plate.

4 Remove the 2 mountingscrews on the drainpump.

5 Displace the drain pumpsideward to remove it.

Q When removing the drainpump, cut the following clampmaterials.

z Clamp material securing thedrain pump lead wire to thedrain pump mounting plate.

z Clamp material bundling thedrain pump lead wire and float

switch lead wire.

3 Removing the float switch Q When removing the floatswitch, cut the following clampmaterials.

z Clamp material securing thedrain pump lead wire to thedrain pump mounting plate.

z Clamp material bundling thedrain pump lead wire andfloat switch lead wire.

1 Reverse the drain pumpmounting plate whichwas removed accordingto the procedure

described on thepreceding page.

2 Remove the 1 screw,displace the float switchsideward, thendismount the floatswitch.


Clamp material

Drain pump

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[Installation procedure ofdrain pump or float switch]1 Install a spare drain

pump or float switch on

the mounting plate, thenfirmly secure the leadwires using the providedclamp materials (3pieces).

2 Connect the lead wires ofthe drain pump or floatswitch in the originalstate, firmly secure theaforementioned clampmaterials (screw typefixing) to the drain panwith the use of mountingscrews.


Mounting screw(For float switch)

Floatswitch

Float switchlead wire

Mounting plate

Provided clamp material(for bundling)(Fix to the hole in themounting plate)

Drain pumplead wire

Provided clampmaterial(for bundling)

Provided mounting screw(for drain pump)

Pay attention to the mountingdirection of clamp material.

1mm or less

Provided clamp material(for fixing screw)(Fix the lead wires eachother.)

Mountingscrew

DrainPan

Clamp material(for fixing screw)

Engage with the fixing tabs (5 tabs)

Drain pump

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1.11.11 Removal of Heat Exchanger Temperature Thermistor


Procedure:

Step Procedure PointsQ Remove the drain pan

according to the procedurefor removing the drain pan.

1 Cut the clamp material.2 Draw the heat exchange

temperature thermistortogether with theinsulation material out inthe direction shown bythe arrow.

Clampmaterial

Heat exchangertemperature thermistor

Insulationmaterial

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1.12 FFQ25, 50, 60B


Topic See page



Removal of Decoration Panel 5–46

Removal of Horizontal Vane 5–49


Removal of Switch Box 5–53

Removal of Fan Rotor and Fan Motor 5–55

Removal of Drain Pan 5–58

Removal of Drain Pump 5–59

Installation of Drain Pump 5–61

Replacement of Heat Exchanger Thermistor 5–64

Replacement of Heat Exchanger 5–66

Replacement of PC Board 5–72

Replacement of Receiver Section of infrared remote control 5–76

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Procedure:


1 Removing the suction grille1 To remove the suction

grille, slide the two tabssimultaneously and pullthe suction grille downslowly.

Q The grille can beinstalled freely in fourdirections. Q When closing, push up the

grille slowly.

2 With the suction grilleopen at an angle of 45°,lift it up to remove it.

(S2630)

(S2631)

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Procedure:


1 Removing the air filter1 Open the suction grille.

(See "Removal ofSuction Grille" .)

2 Disengage the hooks ofthe air filter by pulling thefilter downward at anangle, and remove thefilter.

(S2632)

(S2633)

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2 Installation of the air filter1 Hook the air filter to the

protrusions located at thetop of the suction grille.

2 Push the lower section ofthe air filter into theprotrusions located at thebottom of the suctiongrille to secure the airfilter in place.


(S2634)

(S2635)

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1.12.3 Removal of Decoration Panel


Procedure:


1 Removing the decorationpanel

1 Remove the switch boxcover and disconnect theconnector of swing motorfrom the harnessconnector of electricparts.

2 Check that theprovisional hanger is inthe position where it canbe engaged with the hookof switch box.

(S2636)

(S2637)

Provisional hanger

Hook of switch box

(S2638)

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3 The decoration panel isattached with 4 mountingscrews.

Remove the two fixingscrews at the switch boxside first.

4 Loosen the other twoscrews by approx. 10mm.

The decoration panel ishung with these two fixingscrews and theprovisional hanger.


Provisional hanger

Loosen the two screwsby approx. 10 mm

(S2639)

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5 Turn the provisionalhanger to disengage itfrom the hook of switchbox, and slide the

decoration panel in thearrow direction to removethe panel.


(S2640)

(S2641)

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1.12.4 Removal of Horizontal Vane


Procedure:



Q Refer to the "Removalof Decoration Panel"

2 Remove the padding atfour corners of framefixed with three screwseach. At that time, peel

the end of black sealingmaterial of discharge portin part.

Q Peel not the anti-sweatmaterial but only sealingmaterial of discharge port.

Note: When restore thesealing material ofdischarge port, be carefulthat no clearance existsbetween padding andsealing material asoriginal installation.

(Otherwise, due drippingmay occur due to leakageof cool air.)

(S2642)

(S2643)

Anti-sweat material

Sealing materialof discharge port

(S2644)

Padding

Sealing materialof discharge port

Anti-sweat material

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3 Remove the two screwsfor each bearing ofhorizontal vane (16screws in total).

4 Remove the horizontalvane.


Fixing screws

Fixingscrews

(S2645)

(S2646)

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Procedure:



Q Refer to the "Removalof Decoration Panel"

2 Pull out the swing motorharness from the wiringgroove.

3 Remove two mountingscrews for swing motor

mounting plate to removethe plate.

4 Turn the horizontal vaneto downward manually,and turn up the panelside gear to disengagethe motor side gear.

5 Remove the swingmotor.

Fixing screw

Wiring groove

(S2647)

(S2648)

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Q Precaution during swingmotor insttallation

1 Engage the swingmotor-side gear with thepanel-side one.

(Otherwise, faultyswinging operation orabnormal noise may becaused.)

Install the motor afterchecking of correct gearengagement.

2 Install the swing motor inreverse process ofremoval procedure.

Q When install the decorationpanel, be careful not to catchthe lead wire.

3 After installing the swingmotor, be sure to turn onthe power switch forresetting (for initializingthe vane positions).


Motor-side gear

Panel-side gear

(S2649)

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1.12.6 Removal of Switch Box


Procedure:


Remove decoration panelfirst.

1 Remove the lid of switchbox.(Two pieces of M4screws)

2 Disconnect theconnection wires foroutdoor units and earthwire. At this time, cut thetie wrap fixing theconnection wires.

Disconnect wire ofremote control also. Atthis time, cut the tie wrapfixing the wire of remotecontrol.

(S2650)

(S2651)

Fixingscrew(M4×12)

Fixing

screw(M5×12)

Fixing screw(M4×12)

Wires for remote controller

Tie wrap

Tie wrap

Outdoor unitconnection wireand earth wire

Outdoor unitconnectionwire terminal

P1P2F1 F2 X17A X18AX25A

X20A

Capacitorfor fan

X15A

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3 Remove five pieces oflead wires from PCB onthe switch box and leadwire connected to the

capacitor for fan motor.(Refer to the list shown inthe right.)

4 Cut tie wraps fixing leadwires of float switch,thermistor for heating andliquid pipe thermistor.

5 Remove two fixingscrews located at bothends of switch box andone screw inside the box.

6 Remove the switch box.

∗ Five pieces lead wires shown below (connect to the PCB) andlead wire connected to the capacitor for fan motor.X15A······Lead wire of float switch

X17A······Lead wire of thermistor for heatingX18A······Lead wire of liquid pipe thermistorX20A······Lead wire of fan motorX25A······Lead wire of drain pump

(S2763)

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1.12.7 Removal of Fan Rotor and Fan Motor


Procedure:


Q Remove the switch box.

Q Remove the bell mouth(Two screws)

Q A convex protrusion isprovided at the position of bellmouth fixing screw to preventmisjudgment with switch boxfixing position.

1 Removing the fan rotor1 Remove the resin nut and

rotation stopper todismount the fan rotor.

Q For removal of switch box,refer to the "Removal of SwitchBox" on page 5- 53 .

2 Remove the resin nutwith spanner.

3 Pull down the fan rotorslowly.

(S2653)

(S2654)

(S2655)

Rotationstopper

Resin nut

When tighten or loosen the fanrotor fixing resin nut,hold the base of the fan.see detail below.

Caution

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4 Make sure to hold thehub as shown in Fig.1when tightening orloosening the fan fixingnut with a spanner.Toavoid deformation andvibration of the fan, donot apply excessivetorque to the shroud(the slash part of Fig.2).

Note: There is noproblem to hold theshroud when carryingor lifting the fan.

2 Removing the fan motor1 Disconnect the harness

connector for motor fromthe motor.

2 Remove the threewasher faced bolts.


Hub Shroud

Fig. 1 Fan fixing method Fig. 2 Do not apply excessive torqueto the area shown in slash

(S2764)

Washer faced bolt

(S2656)

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3 Pull down the fan motorslowly.


(S2657)

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1.12.8 Removal of Drain Pan


Procedure:


1 Remove the drain socketto drain water from thedrain hole.

2 Remove the 4 mountingscrews to remove thedrain pan.

Q Remove the drain socket to

drain water from the drain hole.

Q If water is in the drain pan, itcan spill and wet the floor.

Drain water completely orcover the floor with a vinylsheet before removing thedrain pan.

3 Pull down the drain panstraight down.

Drain socket

(S2658)

(S2659)

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1.12.9 Removal of Drain Pump


Procedure:


1 Removing the drain pump1 Remove two screws

fixing float switch ass'y.

(Screw d and e )

2 Remove the float switchass'y.

Q Remove the float switch beforeremoving drain pump in orderto prevent the float switch fromdamage.

Screw

Screw

Screw

(S2660)

(S2661)

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3 Cut the tie wrap fixing thedrain hose.

Remove the screw c

Q When pulling out the drainhose, be sure to wear safetygloves to prevent your fingerfrom injury with heat

exchanger fin.

4 Pull out the drain hose.

5 Remove the drain pump.


Screw

S2662

(S2664)

(S2663)

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1.12.10 Installation of Drain Pump


Procedure:


1 Installing the drain pump1 Put the lead wire in the

wiring groove properly, fixthe drain pump ass'y withscrew c and insert thedrain hose.

Screw c

Wiring groove (S2665)

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4 Insert the float switchass'y.

At this time, put the lead

wires in the wiring grooveproperly.

5 Install the drain pumptogether with the floatswitch with screw d ande .


(S2661)

Wiring grooveLead wires

Screw

Screw

(S2669)

When install the drainpan, put the lead wiresof float switch and drainpump in wiring grooveand pass the lead wiresabove on the blacksealing material on thedrain pan.(Otherwise, duedripping may occur dueto leakage of cool air.)

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1.12.11 Replacement of Heat Exchanger Thermistor


Procedure:


1 Disconnect thegrounding terminal fromthe header.

2 Pull apart the thermistorass'y and motor lead wirefrom the clamps.

Pull out the thermistorfrom the slit of heatexchanger partition plate.

3

4 Remove two screws tothe top panel, then, pullthe partition plate of heatexchanger downward.

(S2670)

ClampClamps

Fan motor lead wire Thermistorass'y

Slit (S2671)

(S2672)

Heat exchangerpartition plate

Fan motor lead wire

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5 Take out the two tiewraps fixing the antisweat tube of header andthermistor.

(Be sure not to take outother tie wrap.)

Q Heat resistance tie wrap isused. Be sure to use a heatresistance tie wrap wheninstalling new thermistor.

∗ Heat resistance tie wrapParts No. :1278921(Drg No. :4SA90202-1)

6 Pull out the thermistorfrom the insertion pipe.Thermistor for heating :The upper one wrappedwith a yellow tapeThermistor for liquidpipe :The lower one withouttaping

Q Replace thermistor as anass'y. (Two thermistors arebound with special heatresistance tube.)


(S2673)

Anti sweat tube

(S2674)

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1.12.12 Replacement of Heat Exchanger


Procedure:


1 Removing the heatexchanger

1 Remove the refrigerantpipe after completion ofrefrigerant collection andpump down operation.

Q This work should be performedwith two personnel includingone person for supporting theheat exchanger to avoid fallingdown during the work.

2 Remove the fixing plateof heat exchanger.

3 Remove the pipe fixingplate mounted with twoscrews.

(S2675)

Heat exchangerfixing plate

Pipe fixingplate

(S2676)

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4 Remove the heatexchanger.

2 Installing the heatexchanger

1 Insert the heat exchangerin the groove of ceilingpolystyrene foamproperly, and bring thetube plate section of heatexchanger into intimatecontact with the

polystyrene partitionplate correctly.

2 Insert the claw section ofpipe fixing plate into thecontracted part of theexternal plate securely.


(S2677)

Groove of ceiling polystyrene foam.

Polystyrene partition platefor heat exchanger tube plate

(S2678)

Bring the heat exchangertube plate section into intimatecontact with polystyrene partitionplate without clearance.

(S2680)

(S2679)Claw section

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3 Install the heatexchanger mountingplate.

4 Insert two thermistors.

Then cover the header byanti sweat tube.

Q Set the lead wire with yellowtape (for heating) upper sidewhile that with no tape (forliquid) lower side.

5 Reinstall the lead wire ofthermistor and anti sweattube on the originalposition by using twopieces of heat resistancetie wrap.

∗ Heat resistance tie wrapParts No.:1278921(Drg No.:4SA90202-1)


Heat exchangermounting plate

(S2681)

(S2682)Anti sweat tube

(S2673)

Anti sweat tube

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6 Put the heat exchangerpartition plate inside andfix them with two screws.

7 Pass the thermistor ass'ythrough the clamps andthe slit of partition platesecurely as the originalstate.

Pass the lead wire ofmotor also through theclamp securely.

8 Insert the groundingterminal to the header.


(S2672)

Heat exchangerpartition plate

Fan motor lead wire

Clamp Clamps

Slit of partition plate

Fan motor lead wire

Thermistor ass'y

(S2683)

(S2684)

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9 Install the drain panputting the lead wire offloat switch and drainpump into the wire

groove securely.When install the drainpan, put the lead wires inwiring groove and passthe lead wires above theblack sealing material onthe drain pan securely.

(Otherwise, due drippingmay occur due to leakageof cool air.)

10 Installing the bell mouth.

When install the bellmouth, put the lead wiresof fan motor andthermistor into the wiringgroove securely as theywere, taking care that thewires do not contact withfan rotor.

11 Tighten the two screws toinstall the bell mouth.

(Bell mouth is formedwith step.)

Q A convex protrusion isprovided at the position of bellmouth fixing screw to preventmisjudgment with switch boxfixing position.


Wiring groove (S2685)

Wiring grooveFan motor lead wire Thermistor ass'y wire

(S2686)

(S2653)

(S2654)

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12 Install the switch box withtwo M4 screws and oneM5 screw.

Q For installation of the switchbox, refer to the "Removal ofSwitch Box" on page 5- 53 .

Q For re-wiring inside the switchbox, refer to the "Replacementof PC Board" on page 5- 72 .


(S2652)

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1.12.13 Replacement of PC Board


Procedure:


1 Removing the PC Board1 Remove the switch box

cover.(M4 screw×2)

2 Disconnect theconnectors shown in theright connected to the PCboard.

Cut the tie wrap fixing thelow tension cable (blue)to the switch box.

3 Press two clawssupporting the PC boardto disengage one side of

the PCB, then tilt theboard and disconnect thelead wire for swing flap.(X36A)

Air temperature thermistor : X19AHigh tension cable of transformer : X11ALow tension cable of transformer : X10AOutdoor unit connection wire : X27AFan motor lead wire : X20ALead wire of remote controller : X5ALead wire of drain pump : X25A

Lead wire of liquid pipe thermistor : X18ALead wire of swing motor : X36A (Refer to the item 3 below.)Lead wire of thermistor for heating : X17ALead wire of float switch : X15A

Lead wire ofremote controller

Tie wrap ClawClaw Low-voltage cable

of transformer

Connector for

fan motor

High-voltagecable oftransformer

Cut this tie wrap

Cut this tie wrapAir temperature thermistor

To the swingflap motor

Outdoor unitconnection wireand earth wire

Outdoor unitconnectionwire terminal

P 1 P 2 F1 F2 X17A X36A X18AX25A

X20A

X27AX11AX10AX19A

X15A

X5A

(S2687)

Claw

(S2688)

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2 Installing the PC board andre-wiring inside the switchbox

1 Engage the PC boardwith two claws shown inthe right figure, push upthe board until a clicksound is generated, thenconnect the lead wiresshown right.

2 Next connect the leadwires in the route shownbelow and fix them withtie wrap in the followingorder.c Connect the fan

motor lead wire to theconnector X20A.

d Connect the lead wireof capacitor for fanmotor to thecapacitor.

e Insert the lead wire ofdrain pump to theconnector X25A.

f Connect the lead wireof float switch toX15A through the

specified path andwire clamp 1.

g Insert two thermistorsto the connectormatching the colorwith X17A and X18Athrough the wireclamp 1(e.g. connect the wirewith yellow tape to theyellow connector).

Connect the lead wire offloat switch and twopieces of wire ofthermistor to the switchbox by using tie wrap h .

(Use tie wrap properly toprevent the wire fromcontact with hot part ofthe PC board.)Insert the rubber bushingof air temperaturethermistor i into the slitof switch box.Then, check that it is

connected to theconnector X19A.


P1P2F1F2

X10A

X36A

X5A X11A X27A

Hooking claws for mounting PC board (Three locations)

Fixing claws for the PC board with pushing force upward(Two locations)

(S2689)

Lead wire of swing motor :X36AHigh roltage cable of transformer :X11ALow roltage cable of transformer :X10AOutdoor unit connection wire :X27AWire of remote controller :X5A

(S2690)

∗ Be careful that the lead wire does not lay off the groove.

To drain pump

Tofloat switch

e Drain pump connector

h Tie wrap

g Heat exchangerthermistor connectorsX17A, X18A

d Lead wire ofcapacitor forfan motor

i Rubber bushing forair temp. thermistor

f Connector X15Afor float switch

j Tie wrap for low-tensioncable of transformer c Fan motor lead wire X20A

To heatexchangerthermistor

Wire clamp

Slack wire hereif the wire isexcessively long.

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3 Re-connect the outdoorunit connection wire, theearth wire and wire ofremote control as they

were, and fix themsecurely with tie wrap.(Only when install theswitch box)

Q Be sure to fix the lead wire tobe connected to the connectorX10A for low-tension cable oftransformer to the switch box

with tie wrap j .(The tie wrap is used forpreventing the wire fromcontact with a hot part on thePC board.)

3 Installing the decorationpanel

1 Put the two holes on thedecoration panel to thepanel mounting screwsand slide the panel, turn

the stoppers to preventthe panel from fallingdown, then install theremainder two screws.

Q When installing the decorationpanel, be careful not to catchthe lead wire.


Powertransformer

Tie wrap

Terminal of outdoor unit

connection wire

Outdoor unit connectionwire and earth wire

(S2691)

PCboard

(S2692) (S2693)

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2 Insert the lead wires ofswing flap to theconnector on the PCboard.

3 Install the cover of switchbox and the grille.


(S2637)

(S2636)

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1.12.14 Replacement of Receiver Section of infrared remote control


Procedure:


1 Removing the receiversection

1 Remove two screws ofthe transmission partsbox to remove the box.

2 Cut the tie wrap fixingtransmission parts boxand harness anddisconnect the connectorX1A.

3 Disconnect the lead wireof the transmission partsbox from the connectorX24A on the indoor unitPC board.

X24

Transmission parts box

(S2695)

(S2694)

Tie wrap

X 2 A

X 1 A

(S2696)

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Q Refer to "Removal ofDecoration Panel"

5 Pull out the lead wire ofreceiver section fromwiring groove.

6 Push three claws on therear side of panel toremove the corner cover(receiver section).

2 Installing the receiversection

1 Pass through the leadwire of the receiversection, and insert thecorner cover.

2 Put the wire in the wiringgroove on the hookingpiece securely.


Decoration panel

Push three claws to removethe corner cover.

Lead wire of receiver section

(S2697)

(S2698)

(S2699)

(S2700)

Hooking piece(S2701)

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3 Install the switch box andthe decoration panel.

Q When install the decorationpanel,be careful not to catch the leadwire.

4 Insert the lead wire of thereceiver section toconnector X1A, and bindthe two wires with tiewrap.

5 Set the dip switches. Q Setting the dip switches

Set the dip switches with sameconditions as those of thetransmission parts boxremoved.(For details of setting, refer tothe instruction manual ofinfrared remote control kit.)

6 Mount the transmissionparts box with two screws

after checking that the tiewrap is in the fixingposition and the lead wireis caught with fixing partof tie wrap and can notcome out.

7 Insert the lead wire fromthe transmission partsbox to the connectorX24A on indoor unit.

Pass through the leadwire to be connected toX24A on the indoor unitPC board under thehooking piece.


Tie wrap

X 2 A

X 1 A

(S2696)

(S2694)

1 2 3 M S

S S 2 S S 1

(S2702)

X24

(S2703)

Hooking piece

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1.13 FHQ35, 50, 60, 71, 100, 125B


Topic See page

Removal of Air Filter and Suction Grille 5–80

Removal of Electrical Parts and PC Boards 5–82

Removal of Horizontal Blade 5–85

Removal of Fan Rotor and Fan Motor 5–86

Removal of Fan Bearing 5–89

Removal of Bottom Panel and Drain Pan 5–91


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1.13.1 Removal of Air Filter and Suction Grille


Procedure:


1 Push the 2 tabs andopen the suction grilles.

2 Push the air filterinstallation panel from 2places in the direction ofthe arrow, and pull the airfilter out toward yourself.

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3 Grip the suction gril lehinge strongly andremove the suction grille.


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1.13.2 Removal of Electrical Parts and PC Boards


Procedure:.


1 Loosen the 2 screws ofthe control box cover andremove the control boxcover.

2 Remove the 2 screws ofthe control box.

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6 Slide the PC board to theleft away from the tabson the right, and removethe PC board.


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1.13.3 Removal of Horizontal Blade


Procedure:


1 Gently bend the supportplate located at thecenter of the horizontalblade, and detach thecenter shaft.(Two shafts providedon Types 140 and160.)

2 Then gently bend thecenter of the horizontalblade, and take both theend shafts out of theirbearings.

Q When removing the horizontalblade from the bearings atboth ends, be careful not toget the blow port thermalinsulation scratched.

Reassembling precautions1 The shaft at the right end

of the horizontal blade iscut in D shape. Fit thisD-shaped end to theD-profiled bearing.Reattach the horizontalblade at the right side

first.

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1.13.4 Removal of Fan Rotor and Fan Motor


Procedure:


1 Push the 2 tabs of the fanhousing toward theinside with your fingers,and pull out the fanhousing.

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2 Loosen the 2 hexagonset screws of theintermediate bearing.

3 Slide the intermediatebearing to the right andremove the fan rotorass’y.


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4 Cut off the tie-wrap of theglass tube cover over thefan motor connector.Slide the glass tube and

get the connectorexposed.

Q A connectorsConnector (1) handles highvoltage (220-240 V), so besure to turn of the power

supply before disconnecting.

5 Disconnect the 2 fanmotor connectingconnectors.

6 Remove the 2 fan motorfasteners.

7 Remove the fan motor. Q Finally reconnect the fanmotor connector, cover it withthe glass tube and secure itwith the tie-wrap.


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1.13.5 Removal of Fan Bearing


Procedure:


Q Remove the fan rotoraccording to the proceduresfor removing the fan rotor andfan motor.

1 Remove the left sidepanel installation screw.

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2 Slide the left side paneltoward the front of theunit and remove.

3 Remove the 2 bearinginstallation screws andremove the bearing.


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1.13.6 Removal of Bottom Panel and Drain Pan


Procedure:


1 Remove the 7 bottompanel installation screws(2 each on the left andright, 3 in the rear), andremove the bottompanel.

Remove the rear surface screws(2 each on the left and right), and

remove the center screw whilesupporting the bottom panel fromunderneath.

2 Let down the rear of thebottom panel, push outtoward the front(removed from thehooking part) andremove.

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3 Remove the drain panretainer (2 screw).

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Procedure:


1 Remove the screw fromthe right side panel. Slidethe right side paneltoward the front anddetach it.

2 Cut off the tie-wrap of theswing motor connector.

3 Disconnect theconnector from the swingmotor connector.

4 Remove the screw fromthe swing motor. Theswing motor has twoprojections on it. Lowerthe swing motor and takeit out.

Q When reassembling, fit thehorizontal blade shaft end tothe D-profiled bearing.Apply the tie-wrap to theconnectors to secure them inplace.

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1.14 FUQ71, 100, 125B


Topic See page



Removal of Fan 5–98



Removal of Drain Pump 5–105


Removal of Air Flow Control Blade 5–109

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Procedure:


1 Opening suction grille

Push two tabs on suctiongrille toward the center ofgrille at the same time.

2 Pull down suction grille.(Two strings areequipped to prevent thegrille from dropping.)

3 To remove air filter, liftthe tabs up at the sametime and pull it forward.

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Procedure:


1 Unhook twodrop-prevention stringswhile supporting suctiongrille with hand.

2 Open suction grilleforward for approx. 45degree.

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3 Disengage three hookslocated at rear side of thegrille to remove suctiongrille.


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1.14.3 Removal of Fan


Procedure:


1 Remove two mountingscrews to dismountswitch box cover.

2 Remove suction airtemperature thermistorattached to bell mouth.

3 Bell mouth is mountedwith tree screws.

Loosen a screw locatedat diagonal position tothe pipings and removeother two screws.

Edge of rib

Stick filamenttape Edge of

clamp

(S1271)

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Procedure:


1 Removing fan motor

a. Disconnect connector.

b. Remove lead wireretaining plate.

Caution:

Fan motor can be removedwithout removing the lead wireretaining plate.However, when washing the heatexchanger, this plate should beremoved and protect the leadwires.

2 Remove screws formounting fan motor.

Q FUQ71BUV1B:Three screws

Q FUQ100/125BUV1B:Four screws

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3 Remove motor by pullingdown.


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Procedure:Step Procedure PointsQ Remove suction grille

according to the Removal ofair filter and that of suctiongrille.

1 To dismount three cornersections A, B and C,remove a flocked screw.

2 Remove three flockedscrews to dismountcorner section D.

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3 Disconnect wires andconnectors from PCB.

4 Arrange wire harness toavoid interference withnext process.

Caution:

This work should be done by twopersonnel.If drain water remain in the pan, itmay drop and stain on the floor.Make sure to check if no drainwater remain in the pan, or coverthe floor with vinyl sheet before

disassembling work.

5 To dismount drain panblocking plate, removeeach two mountingscrews located at fourcorners.


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6 Remove drain pan bypulling it down.


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1.14.6 Removal of Drain Pump


Procedure:


1 Drain pump is located atpiping side.

Cut clamp material ofhose, and disconnecthose from pump.

Caution:

When reconnect drain hose withthe pump, secure hose at jointusing clamping material such asTielap. (Clamping material shouldbe normally included in the stockitems.)

2 Remove four screws todismount drain pump.

3 Dismount drain pump bypulling it down.

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4 Removing float switch

a. Loosen threemounting screws to

remove drain pumpmounting base.

b. Remove two screwslocated at opposite sideof drain pump mountingbase to dismount floatswitch.


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Procedure:


Q Remove suction grilleaccording to "Removal ofSuction Grille"

1 Swing motor is located atthe diagonal position ofpiping.

2 Remove two mountingscrews for swing motorcover.

3 Remove swing motorcover by holding two tabson the cover.

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4 Remove two screws todismount swing motor.


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1.14.8 Removal of Air Flow Control Blade


Procedure:


1 To remove horizontalblade, press down tabslocated at both end ofblade and pull themforward.

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2 Remove horizontalblade.


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1.15 FAQ71B


Topic See page

Removal of Air Filter and Front Panel 5–112

Removal of Front Grille 5–112

Removal of the horizontal blade and vertical blade 5–115

Removal of Electrical Box 5–117

Removal of Heat Exchanger 5–118

Removal of Fan Motor and Fan Rotor 5–119

Removal of Air Swing Motor 5–120

Drain Hose Piping to the Left 5–121

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1.15.1 Removal of Air Filter and Front Panel


Procedure:


1 Put your fingers onprotrusions at left andright side of the unit toopen the front panel.

2 To remove the air filter,push up the tab and pulldown the filter.

Q The air filter is free from theside of left or right.

Q It is easy to install if insertingalong the guide.

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3 Disengage the holdingsection on upper right ofthe panel by pushingtoward left, then slide

toward right to removethe front panel.


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1.15.2 Removal of Front Grille


Procedure:


Q Removing the front panel inaccordance with "Removalof Front Panel".

1 Remove three pieces offront grille fixing screws.

2 Remove the front grille bypulling forward whilepushing three hookslocated at upper part ofthe grille one by one.

Q If hard to remove, try to pushthe hooks by a screwdriver orthe like to remove.

3 The front grille can be

removed by pullingforward and lift thebottom part.

Q Make sure that the three

hooks are set on the originalposition when reinstalling thefront grille.

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1.15.3 Removal of the horizontal blade and vertical blade


Procedure:


1 Removing the horizontalblade.

1 Open the horizontalblade.

2 Bend the horizontal bladeslightly to disengage thefixing part at right side.

3 Pull the horizontal bladerightward and take it out.

Horizontal blade

Holder

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2 Removing the vertical blade.1 Disengage the protrusion

on upper side of bladefrom holder plate. (Threelocations)

2 Push the vertical bladebackward and pull thelower side forward todisengage the blade fromthree hooks.


Holder plate

Protrusion

Holder plate

Vertical blade

Hook

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1.15.4 Removal of Electrical Box


Procedure:


Q Removing the front grille inaccordance with "Removalof Front Grille" .

1 Remove the screw on theservice cover.

2 Remove the screw on thedrip proof plate.

3 Remove the screw for thegrounding wire.

4 Remove the followingconnectors.

Q Fan motor connector

Q Air swing motorconnector

5 Pull the heat exchangerthermistor and dismantleit.

6 Remove the fixing screwfor switch box.

7 Pull forward the switchbox holding lower part ofthe box.

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1.15.5 Removal of Heat Exchanger


Procedure:


Q Removing the front grille inaccordance with "Removalof Front Grille" .Removing the switch box inaccordance with "Removalof Electrical Box" .

Caution:

If gas leaks, repair the leakagesection, collect refrigerant insidethe unit completely, then,recharge refrigerant afterperforming vacuum dehydration.

Caution:

Don't mix air or the like other thanthe specified refrigerant into arefrigeration circle.

(Mixing of air or other gas causesabnormal high pressure in therefrigerating cycle and results inpipe rupture or personal injuries.)

Q Pay attention not to soil thefloor with residual drain.

Q In case that the drain hose isburied inside wall, remove theheat exchanger after pullingout the drain hose.

Caution:

When removing or reinstalling theheat exchanger, be sure to weargloves or wrap the heatexchanger with cloth or the like.(Otherwise, the fins may injureyour hand.)

1 Press strongly the clawson both left and rightsides of heat exchangertoward inside.

2 To remove the heat

exchanger, pull it upward.

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1.15.6 Removal of Fan Motor and Fan Rotor


Procedure:


Q Removing the front grille inaccordance with "Removalof Front Grille" .Removing the electrical boxin accordance with"Removal of Electrical Box" .

1 Removing the fan motor1 Insert a Phillips tip

screwdriver into the air

outlet and remove thescrews fixing the fanmotor and fan rotor. (Thescrews can be removedwithout removing ofhorizontal blade.)

2 Remove the two screwson the bearing cover (1)and (2) and dismantle thecovers.

3 Take out the fan motorsideways.

2 Removing the fan rotorQ Removing the heat

exchanger in accordancewith "Removal of HeatExchanger" .

1 Remove the two screwsto dismantle the rotorcover.

2 Pull the fan rotor out.

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1.15.7 Removal of Air Swing Motor


Procedure:



1 Disconnect the air swingmotor connector in theelectrical box.

2 Remove the screw whichfixes the air swing motor.

3 Pull the air swing linkassembly to the leftstrongly to dismantle.

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1.15.8 Drain Hose Piping to the Left


Procedure:



Q The drain pan and bottomframe are designed as anintegral-type.

Q Insert the drain hose to thehose plug securely as far as itwill go.

1 Pull out the drain hoseattached on the rear rightof the unit.

2 Pull out the drain plugand drain socketattached on the rear leftof the unit.

3 Piping of Drain Hose atLeft Side.

4 Insert the drain plug anddrain socket into the rightside of the unit withhexagonal pin wrench.

Q Insert the drain plug andsocket securely as far as it willgo.

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1.16 FAQ100B


Topic See page


Removal of Slide Panel, Operation Display Cover, and Front Grille 5–124

Removal of Electrical Parts Box 5–125

Removal of PC Board 5–126

Removal of Swing Louvre Unit 5–127



Removal of Heat Exchanger 5–132

Removal of Fan Rotor 5–133

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Procedure:


1 Hold the air filter tabswith your hands and pullout.

2 Pull the air fil ter out.

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1.16.2 Removal of Slide Panel, Operation Display Cover, and Front Grille


Procedure:


1 Remove the left and rightside panels. (1 whitescrew each on left andright)

The wiring diagram is applied tothe right side panel, andtroubleshooting list is applied tothe left side panel.

2 Remove the operation

display cover installationscrew and remove thecover by sliding to theright.

3 Remove the front grilleinstallation screws (3

M4X l12 screws withspacers)

4 Disconnect the upperhook of the front grilleand remove.

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1.16.3 Removal of Electrical Parts Box


Procedure:


Q Remove the left and right sidepanels, operation displaycover and front grilleaccording to the proceduresfor their removal.

The left and right side panelshave to be taken off in order toremove the front grille.

1 Remove the(1) thermistor,(2) heater connectorand(3) rubber clipconnected to the PCboard.

2 Remove the 2 screwsfastening the electricalparts box to the units.

3 Lift the electrical partsbox and remove bymoving toward the right.

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1.16.4 Removal of PC Board


Procedure:Step Procedure PointsQ Remove the outer panels

according to the procedurefor "Removal of ElectricalParts Box" .

1 Disconnect the front sidewiring connectorconnected to the PCboard.

2 Disconnect the PC boardfrom the tabs by pushingit inward. Draw the PCboard out partly anddisconnect the remainingconnectors.

The tape holding the electricalparts box and PC board is fortransport, and is unnecessarywhen reinstalling.

3 Completely remove thePC board.

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1.16.5 Removal of Swing Louvre Unit


Procedure:


Q Remove the electrical partsbox according to "Removal ofElectrical Parts Box" .

1 Remove the horizontalblade.

2 Remove the swingLouvre unit. (3 screws)

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3 Remove the swing motorfrom the swing Louvreunit.

You can replace the swing motorwithout removing the swingLouvre unit.


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Procedure:


Q Remove side panels andother external casing, andelectrical parts box accordingto their removal procedures.

Use 2.5 mm hexagon nut driver.

1 Loosen the hexagon setscrew fastening the fanrotor and fan motor.

2 Remove the fan motorfastener. (3 screws)

3 Remove the fan motor.

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Procedure:Step Procedure PointsQ If removing the drain pan:

Carry out pump down,disconnect the transmissionpiping and wiring, andremove the main unit.

The bottom panel is fastened tothe unit installation plate by 3screws.

Q Remove side panels,operation display cover andfront cover according totheir removal procedures.

1 Remove the bottompanel.

2 Remove the air dischargesection.

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3 Remove the air dischargeunit.(7 screws)

Center of air discharge sectionalso screw fastened.

4 Remove the drain pan. 1 Pull left side toward yourself.

2 Move the drain hose to theright until it comes off.


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1.16.8 Removal of Heat Exchanger


Procedure:


Q Before dismounting a heatexchanger, make sure toproceed pump downrefrigerant to outdoor unit anddisconnect the connectionpipe and wiring, then removethe indoor unit.

1 Dismount top plate

2 Remove the 3 settingscrews for heatexchanger and onescrew for pipe fixing box.

There is a hock right hand sidebehind the heat exchanger.

Top plate

(S1325)

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1.16.9 Removal of Fan Rotor


Procedure:


Q Remove the heat exchangeraccording to "Removal ofHeat Exchanger" .

You can also remove the auxiliaryelectric heater without removingthe heat exchanger.

1 Remove the 2 screws ofthe left side panel.

2 Remove the fan rotor bysliding to the left andpulling out towardyourself.

Reference:If you have enough space to pullthe fan rotor out from the left side,you can remove it withoutdismounting the heat exchanger.

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ESIEN05-04

Index i

3

4

5

1Index

Symbols"88" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–17

AA1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–32A3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–33A6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–36AF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–35Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–44 , 5–80 , 5–95 , 5–112 , 5–123AJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–38Automatic restart . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–10

BBottom Panel. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–91

CC4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–40

C5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–40C9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–40CC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–43Ceiling height. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–15Centralized Address Setting Error. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–52Centralized group No. Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–19Changing

Field settings, wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–11Field settings, infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–12Maintenance mode settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–21

CheckingClogged points . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–60Fan motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–61PCB’s Hall IC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–54Power supply wave form . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3 –55Test run checks. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–4Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–56

CJ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–42Combination overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k i–iiComponents

Exploded views, indoor units. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–3Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–55PCB layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–107Switch box layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–95Wired remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–10infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–12Wiring diagrams, indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–61

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ESIEN05-04

ii Index

ControlCondensation avoidance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–19 , 2–20 , 2–21

Draft avoidance control 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–20Draft avoidance control 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–21Drain pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–17Indoor unit fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–23PMV. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–15Thermostat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–16

Correlation of Air-Conditioner’s Operation Status and Pressure / Running Current . . . . . . . . . . . . . . . k 4–26

DDecoration Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–26 , 5–46Diameters, pipe connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–55Dimensions

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–3

Draft avoidance control 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–21Drain Pan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–58 , 5–91 , 5–102 , 5–130Drain Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–59 , 5–61 , 5–105

EEEPROM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–32Electrical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–45Emergency operation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–5Error codes

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–31System malfunctions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–45

EvaluationAbnormal high pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–58Abnormal low pressure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–59

Exploded viewsIndoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–3

FFactory settings

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–14Fan and flap operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–22Fan Bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–89Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–55 , 5–86 , 5–100 , 5–119 , 5–129Fan Rotor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–55 , 5–86 , 5–119 , 5–133FAQ100B

Removal of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–123Removal of Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–130Removal of Electrical Parts Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–125Removal of Swing Louvre Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–127

FAQ100BUV1BRemoval of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–129Removal of Fan Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–133Removal of Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–132Removal of PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–126Removal of Slide Panel, Operation Display Cover, and Front Grille . . . . . . . . . . . . . . . . . . . . . k 5–124

FAQ71BDrain Hose Piping to the Left. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–121Removal of Air Filter and Front Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–112Removal of Air Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–120Removal of Fan Motor and Fan Rotor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–119Removal of Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–118

Removal of the horizontal blade and vertical blade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–115FAQ71BUV1BRemoval of Electrical Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–117Removal of Front Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–114

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ESIEN05-04

Index iii

3

4

5

1FCQ71~140D

Removal of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–24

Removal of Decoration Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–26Removal of Drain Pan, Drain Pump, Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–38Removal of Fan Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–36Removal of Heat Exchanger Temperature Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–41Removal of Horizontal Blade. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–28Removal of Humidity Sensor and Air Temperature Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–35Removal of PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–33Removal of Suction Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23Removal of Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–29Removal of Switch Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–31

FFQ35~60BInstallation of drain pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–61Removal of air filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–44Removal of decoration panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–46Removal of drain pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–58

Removal of drain pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–59Removal of fan rotor and fan motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–55Removal of horizontal vane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–49Removal of suction grille. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–43Removal of swing motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–51Removal of switch box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–53Replacement of heat exchanger thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–64Replacement of heat exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–66Replacement of PC board. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–72Replacement of receiver of infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–76

FHQ35~125BRemoval of air filter and suction grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–80Removal of bottom panel and drain pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–91Removal of electrical parts and pcb boards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–82Removal of fan bearing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–89

Removal of fan rotor and fan motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–86Removal of horizontal blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–85Removal of swing motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–93

Field settingsLevels . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–20Overview indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–13

Filter counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–16Forced operating mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–5Forced thermostat OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–13Freeze prevention function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–14Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–55FUQ71~125B

Removal of Air Filter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–95Removal of Drain Pan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–102Removal of Fan. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–98

Removal of Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–107FUQ71~125BU

Removal of Air Flow Control Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–109Removal of Drain Pump . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–105Removal of Fan Motor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–100Removal of Suction Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–96

HHeat Exchanger. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–66Horizontal Blade . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–85Horizontal Vane. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–49

IIdentification function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–7

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ESIEN05-04

iv Index

LLocating

Exploded views, indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–3Functional diagrams . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–55PCB layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–107Switch box layout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–95Thermistors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–4Wired remote control components. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–10infrared remote control components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–12Wiring diagrams, indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–61

MMalfunction Code and LED Display Table

Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–28System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–29

Malfunction ofCapacity setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–38Drain system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–35Drain water level systemt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–33Field setting switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–50Indoor PCB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–32remote control air thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–42remote control air thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–43Transmission between indoor and outdoor unit. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–46Transmission between indoor unit and remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–48Transmission between MAIN and SUB remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–49

Motor lockIndoor unit fan . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–36

OOperation data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–24Outlook

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–3

PPCBs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–107Printed Circuit Board (PCB)

Indoor Unit PCB (FFQ-B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–72Indoor Unit PCB (FHQ-B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–82

RReceiver Section . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–76remote control

Multiple setting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–8Setting address for receiver of infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5Setting address for infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6Thermostat, using conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–11

remote control Display Malfunction Code and Contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–26Removal of Drain Pan, Drain Pump, Float Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–38Removal of Heat Exchanger Temperature Thermistor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–41Removal of PC Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–33Resistance conversion table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–57

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ESIEN05-04

Index v

3

4

5

1SSafety devices

Indoor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–30Self-Diagnosis by Wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3–21Setting

Address for receiver of infrared remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–5Address for infrared remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–6Ceiling height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–15Centralized group No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–19Field settings, wired remote control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–11Field settings, infrared remote control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–12Filter counter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–16MAIN/SUB when using two remote controls . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–18

SettingsChanging maintenance mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–21Factory overview indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–14

Feld overview indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–13Maintenance mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–22Possible system settings. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–21

Simulated operation function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2–8Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–45Standard Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4–25Suction Grille . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–23, 5–43, 5–80, 5–96Swing Motor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–51, 5–93, 5–107, 5–120Switch box

Layout . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1–95Removal . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5–53

TTechnical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–45Test run

Checks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 4–4Thermistor

Indoor Heat Exchanger . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 5–64Thermistors

Checking . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3 –56Functions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–4Locating. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 2–4

Troubleshooting Based on Equipment ConditionCooling/Heating Operation Starts but Stops Immediately. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–10Equipment Discharges Dust.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–16Equipment Discharges White Mist . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–14Equipment does not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–6Equipment Operates but does not Provide Heating.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–12

Equipment Produces Loud Noise or Shakes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–15Indoor Fan Operates, but Compressor does not. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–8remote control LCD Displays "88". . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–17Swing Flap does not Operate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–18

Troubleshooting by LED Indication on the Indoor Unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–27Troubleshooting by remote control Display / LED Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–28

UU4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–46U5 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–48U8 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–49UA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–50UC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–52

UF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 3–46

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ESIEN05-04

vi Index

WWiring diagrams

Indoor units . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . k 1–61

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Documents

ESIEN05-04 - R-410A Sky Air Indoor_part2_tcm135-72767