Service Manual H2SM-14 18HC03R2-SM080229

Domestic Air Conditioner

SERVICE MANUAL

Models : H2SM-14HC03/R2

Features

Comfortable:wide-angle airflowHealth air purifying Quiet operation Engergy efficient Wide variety of functions

Serial Number: Versio n:00.00 Edition: 2005-3-25

H2SM-18HC03/R2

Content 1. Description of product model coding and series introduction 2. Specifications 3. Curves of performance 4. Description,net dimensions and functions of main component s

and accessories 5. Brief introduction to electrical control functions 6. Abnormity diagnose 7. Wiring diagram 8. Circuit diagram

9.Trouble shooting 10. Refrigerating cycle diagram 11. Noise level test chart and air veloc ity distribution 12. Installation manual

Domestic Air Conditioner Model: H2SM-14HC03/R2 H2SM-18HC03/R2

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Description of product modelcoding and series introduction


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No.

1

2

3

Operating condition

Norminal cooling

Norminal heating

Norminal electricalheating

indoor air statusDBOC WBOC

20OC 15OC

DBOC WBOC

7OC 6OC

outdoor air status

--- --- --- ---

B.Standard Situation/Conditions

27OC 19OC 35OC 24OC

A. Description of coding rules of unit model

The type of power supplyDeveloping sequence

Function code H-heat pumpe-electric aided heating

numbers based on thousand unitThe structure code of indoor & outdoor unit

H-Abbreviation of Haier

3 4 5 6 7 81 9 10

C-cooling only

Examples:

H2SM-18HB03/R2,It represents wall-mounted multi-type split type room air conditioner.The cooling capacity is 18000BTU/h,and the power supply is 220-230V/50Hz,”B” means the improvement

2

The quantity of the indoor unit is two


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C.Series brief introduction

1.comfortable:wide-angle airflow The vertical dual-flap and horizontal wide-angle louvers ensure the cool(warm air reaches every corner of the room.

2.Health air purifying and negative ion function An air purifying filter with deodorizing and disinfecting functions keeps the air clean and users healthy.The negative ion generator can produce the negative ion that make the air fresher and cleaner.

3.Quiet operation Fan With Random-pitched Blades. Random-pitched blades help reduce operating noise while maintaining a high airflow rate.

2.Engergy efficient The design of inner-grooved copper tube greatly increases the refrigerant contact area and the efficiency of cooling/heating functions.

5.Convenience Auto restart and washable panel: The grille can be removed easily and washed when necessary.Any series have the function then even if the power falls when the unit is operating unit will automatically return to the operating settings in use before the power failure when power is restored.

6.Wide variety of functions 24-Hour Timer: 24-hour timer allows users to select the exact time they would like the air conditioner to turn on and to turn off.Timers on previous models operation based on the number of hours of desired operation.

7.Night-set models When the air conditioner is operationg on the timer-off circuit.The preset room temperature gradually rises(going down in heating)before the unit stops as shown delow.Users can sleep comfortably without sudden change in temperature.

8.Program”dry” This function automatically reduces the level of humidity while maintaining the preset indoor temperature.


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Specifications


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CURVES OF PERFORMANCE


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OF COMPRESSOR

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Performance Curve Return Gas Temperature

35

Model 39A173A

Subcooling

8.3

Power Supply

220-230V / 50Hz / 1PH

Run Capacitor

25 μF / 370 VAC Ambient Temperature

35

Cond. Temperature

800970

114013101480165018201990216023302500

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12

Cap

acit

y (K

cal/

Hr)

455055

60

550585620655690725760795830865900

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12

Pow

er (W

atts

)

2.502.652.802.953.103.253.403.553.703.854.00

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12

Cur

rent

(A

mps

)

20.023.527.030.534.037.541.044.548.051.555.0

-8 -7 -6 -5 -4 -3 -2 -1 0 1 2 3 4 5 6 7 8 9 10 11 12

Evaporating Temperature( )

Flow

(K

g/H

r)

C

C

C

C

OC

OC

OC

OC

50

55

60

OC

OC

OC

OC

45

5045

55

60

OC

OC

OC

OC

60O

C

55OC

50OC

OC45


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Performance Curve Return Gas Temperature 35

Model 44A233ASubcooling 8.3

Power Supply 220-230V / 50Hz / 1PH

Run Capacitor 40 uF / 370 VAC Ambient Temperature 35

Cond.Temperature

1500

190021002300250027002900310033003500

Capa

city

(Kca

l/Hr)

750790830870910950990

Pow

er(W

atts

)

3.33.53.73.94.14.34.54.74.95.15.3

Curre

nt(A

mps

)

38.041.244.447.6

57.2

70.0

Evaporating Temperature( )

Flow

(Kg/

Hr)

C

C

C

55 C

C60

C50

C45

55 C

C60

C50

C45

C45C50

55 CC60

C45C50

55 C

C

60

1700

0 1 2 3 4 5 6 7 8 9 10 11 12- 1

0 1 2 3 4 5 6 7 8 9 10 11 12- 1

0 1 2 3 4 5 6 7 8 9 10 11 12- 1

0 1 2 3 4 5 6 7 8 9 10 11 12- 1

50.854.0

60.463.666.8

107011101150

1030

C


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DESCRIPTION, DIMENSION

& FUNCTION OF MAIN

COMPONENTS AND ACCESSORIES


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Description and function of main components and accessories


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795

26

5

182

Net dimensions for outdoor unit

583815

869

68

0

319.5352

295

Net dimensions for indoor unit


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BRIEF INTRODUCTION TO

ELECTRICAL CONTROL FUNCTION


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one. Temperature Control Function In temperature control function, the operation frequency of outdoor unit is determined based on room temperature and the set temperature. In automatic fan speed mode, indoor fan is controlled based on the need of temperature control In heating mode, indoor fan is controlled based on the temperature of coil. 1-1-1.Specification of Indoor Ambient Temperature Sensor In case of short circuit or open circuit, indicator lamp alarms and indoor fan stops. When normal condition is resumed, fan will automatically restart and operate normally. Short Circuit: Temperature: over 126oC, Hexadecimal System: over F8H, Resistance: below 0.65K,Voltage: over 4.85V. Normal Temperature: Temperature: 25 oC, Hexadecimal System: 40H, Resistance: 23K, Voltage: 2.33V. Open Circuit: Temperature: below -31 oC, Hexadecimal System: below 08H, Resistance: below 620K Voltage: below 0.15V. B Parameter = 4200 R (25 oC) = 23K 1-1-2 Specification of Indoor Coil Temperature Sensor B Constant Number = 3700 R (25 oC) = 10K1-1-3 When heating operation starts and indoor fan stops or when within 30s of indoor fan starts after heating operation starts, the resistant of indoor ambient temperature sensor is ignored. (to avoid the impact of heat exchanger temperature over it.) When forced operation ends after start-up, temperature zone control begins. 1-3. Set Temperature Correction Set temperature is corrected according to unit model, operation mode, fan speed and whether it is in power operation. Fan speed correction is available only during low and mid heating operation. 1-4. Temperature Zone Control 1-4-1.ErrorTemperature zone error is calculated as per the following formula:In Heating Mode: E = (Remote Control Set Temperature + Correction Value) – Indoor Temperature In Cooling & Dehumidification Mode: E = Indoor Temperature - (Remote Control Set Temperature +

Correction Value) 1-4-2 Compressor Shutdown E is negative and |E|> T

Heating Cooling T TCHAHL 0.67 TCHACL 0.33

After change of T TCHAHH 0.67 TCHACH 1 T Change Condition When operation starts E 3.0 ,

Compressor shuts down after continuous testing for 120s, At the beginning of operation, with reference to the conditions given in above table, it operates based on the parameters after change of T until compressor shuts down for the first time. In the time period between compressor shutdown and restart, it operates based on T. (except in dehumidification mode) Compressor starts at the beginning of operation or upon switch of operation mode (except standby ends) or when E (error) > - T. When compressor is operating, remote control set temperature is changing towards the direction of compressor shutdown and when it is below – T, compressor will shut down. 2-4-3. Compressor Operation Compressor restarts when E (error) > - T+0.67 and when 3 mins standby is over.


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two. Indoor Fan Control

2-1. Heating 2-1-1. Warm Start Two. Cold Air Control in Heating Mode

Heat Exchange Temperature:

THHOT3

37.0

THHOT2

35.2

THHOT1

25.2 4mins

THHOTR

16

Stop SLO LO Set LO SLO Stop Conduct indoor fan control as per the above diagram and the heat exchange temperature. 1. Judge wind speed when heat exchange temperature is rising:

Fan is at super low level when heat exchange temperature is below 35.2 . Fan will stop upon initially energized into heating mode or after defrosting, or when heat exchange temperature is lower than 25.2 . Fan is at super low level when temperature is higher than 25.2 but lower than 35.2

. ;Fan is at low level when heat exchange temperature is between 35.2 and 37 ;Fan will operate as per setting when heat exchange temperature is above 37 .

2. Judge wind speed when heat exchange temperature is falling: Fan is at low level when heat exchange temperature is below 35.2 but above 25.2 ;Fan is at super low level and will maintain the mode when heat exchange temperature is lower than 25.2 Fan is at super low level upon initially energized into heating mode or after defrosting, or heat exchange temperature is lower than 25.2 but higher than 16 ; Fan will stop when heat exchange temperature falls below 16 .

3. Wind speed is at super low or low level when heat exchange temperature is rising. If heat exchange temperature fails to enter the next temperature zone after 4 mins while wind speed rises to the next stage, it is necessary to maintain the set wind speed for 4 mins before it is adjusted based on heat exchange temperature.

4. When heat exchange temperature is falling, wind speed will return to set speed if low wind level is maintained for over 4 mins.

2-1-2. 3 mins standby period when compressor shutdown. 1. When compressor shuts down temperature sensor is off , airflow is low for the initial 20s then reduced to super low (When in silent operation, it is SSLO); 2. Wind is maintained at super low level in the standby period in heating mode Compressor stops during mode switch. .3. Remote control shut down and stop indoor fan. 2-1-3. Compressor Restart When warm start, airflow is at remote control set level. When in automatic airflow mode, airflow is determined based on temperature. Refers to temperature zone control functions. 2-2 Cooling Airflow is different when airflow is set at high, mid and low level. When in automatic airflow mode, airflow is determined as per temperature. Refers to temperature control functions. 2-3. Dehumidification 2-3-1. Compressor is off and is in 3 mins standby.


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Fan will stop if compressor stops Fan is at super low level upon the end of 3 mins standby. Compressor is on after 3 mins standby. 2-3-2. Compressor is on. When airflow is set at high, mid or low level, fan will operate as per the setting. When in automatic airflow mode, airflow is determined as per temperature.

three. Timed Operation Time counting will start based on the difference of timer clock and current clock. In timed operation, display panel timer lamp is on. 3-0-1. Timer Off When timer off is set, panel timer lamp is on and unit will stop operation as per the timing. 3-0-2. Timer On If timer on is set, when unit is off, panel timer lamp will be on and unit will resume operation as per the timing and in set mode. Execution sequence is based on the setting. Four . Sleep Operation When remote control set sleep mode, timer lamp is on. 4 1. In cooling/dehumidification mode, set temperature will rise 1oC after 1 hour operation and another 1oC after the second hour. The unit will stop after another 6 hours. 4 2. In heating mode, set temperature will fall 2 oC after 1 hour and another 2 oC after the second hour and will rise 1oC after another 3 hours and the unit will stop after another 3 hours. 4 3 If airflow of indoor fan is high before setting sleep mode, then it will turn into mid level after sleep mode is set. If airflow of indoor fan is mid before setting, it will turn into low level after setting. If airflow of indoor fan is low before setting, then it will not change after setting. Five . Automatic Operation

4-1. Automatic Operation Mode: On entering this mode, main control unit will decide the corresponding operation mode as per room

temperature to maintain the set temperature Set temperature is 23 in heating mode and 26 in cooling mode. .

Upon initial startup, the unit will enter heating mode if room inlet air temperature is equal to or lower than 23 or it will enter cooling mode if temperature is higher than 23 .

When entering heating mode, the unit will operate as per heating program set temperature is 23Upon reaching temperature where compressor stops operation, compressor will stop and standby for 3 mins. In case it detects that inlet air temperature is higher than 27 15 mins after compressor stops, the unit will enter cooling mode. Otherwise, the unit will remain in heating mode.

When entering cooling mode, the unit will operate as per cooling program set temperature is 26 .Temperature difference compensation is automatically cancelled. Upon reaching temperature where compressor stops operation, compressor will stop and standby for 3 mins. In case it detects that inlet air temperature is equal to or lower than 23 15 mins after compressor stops, the unit will enter heating mode. Otherwise, the unit will remain in cooling mode.

If the unit changes into automatic mode from any other mode and if the operation mode is changed (detect before operation), the unit will stop for 3 mins and it will operate based on inlet air temperature after 3 mins.

Six . Trial OperationTrial operation will end after 30 mins, after which unit shuts down. In trial operation, the unit will quit trial operation mode upon reception of signal.

Compressor Stop Protection:


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Eight . EEPROM Control When outdoor unit is supplied with power, if there is any inconsistency between EEPROM parameter and

checksum, EEPROM error.

When indoor unit receives EEPROM error signal from outdoor unit, it will display outdoor unit EEPROM error.

At this time, control and emergency operation are not acceptable.

It can only be cancelled through power off.

Nine . Error Detect Method 9-1. Indoor Temperature Sensor Error

In operation, an error occurs if the temperature is above 126 oC or below – 31oC.

Operation will resume automatically when temperature is outside the above range.

9-2. Heat Exchange Temperature Sensor Error

In operation, an error occurs if the temperature is above 196 oC or below – 53oC.

Operation will resume automatically when temperature is outside the above range.

In error condition, low load protection is cancelled.

9-4. Transmission Error

Based on the condition of communication between indoor and outdoor unit, in case outdoor unit fails to

receive signal within 20s after indoor unit sends out signal, transmission is abnormal. (except in the period of

first 2 mins when power is supplied.). It is confirmed as transmission error when outdoor unit receive the error

signal.

Transmission error is removed by stopping operation.

Ten . Special Function

10-1. Power-Off Compensation

a Entry Condition: Press sleep key 10 times in 7s and buzzer gives out 4 sounds and save the current status

into indoor unit EEPROM upon the entry.

b. On entering power-off compensation operation, indoor unit operates as per the following procedures:

Remote control emergency signal, and operates as per condition set by remote control and emergency setting

and save the current status into indoor unit EEPROM.

Main unit will operate as per condition set on panel board. And save the current status into indoor unit

EEPROM.

c. Exit Condition: Press sleep key 10 times in 7s and buzzer gives out 2 sounds

d. If timer and sleep features are set under power-off compensation condition, main unit memory is in a state

of shut-off if power is off and on again.


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Eleven . Error Presentation Mode 11.1 Three Indicator Error Code

Error Display

Error Conditions PS Timer Operation

Operation Heating Cooling

Indoor

Outdoor

Autom

atic

Reset

Cause

Indoor Senistor Error * * 1. Connector loose contact or ambient

temperature sensor error.

Indoor Heat Exchange Senistor Error

* * 1. Connector loose contact or coil sensor error.

Outdoor Senistor Error * * 1. Connector loose contact or sensor error

*1. There is large interference source around or wiring error. Transmission Error

* 2. Wiring error or control panel error.

* 1. Whether control panel is damaged. EEPROM Error

* 1. Whether control panel is damaged.

Indoor Fan Error *

Note On Blink Off * This function is available.

Twelve . Emergency Switch When shutdown, press emergency switch down for less than 5s, the unit will start emergency operation. When shutdown, press emergency switch down for more than 5s but less than 10s, the unit will start trial operation. When shutdown, press emergency switch down for more than 10s but less than 15s, it will demonstrate the previous error. When shutdown, press emergency switch down, the panel will display automatic operation. When shutdown, press emergency switch down for less than 15s, or remove hand from emergency switch, the unit will not accept remote control signal. Unit enters shutdown condition after 15s. Unit can receive remote control signal after 15s. Press emergency switch during operation, air-conditioner will shut down., During operation, if error occurs, press emergency switch to shut down the unit to clear error condition. During error presentation, press emergency switch and error presentation will end. During operation, if emergency switch is pressed continuously (press and hold) in normal or abnormal condition (such as tact switch short circuit) or in error presentation condition, the unit can also receive remote control signal. Error Record Presentation Mode: When press and hold switch for 10s it gives out 3 sounds, release switch to enter error record presentation mode. Press and hold switch for 15s, panel display is off and error record presentation mode is cancelled. Previous alarm information will be sent to display panel for status display. Error record presentation mode is cleared after 10s. (Error record presentation mode is only displayed for 10s.) During the presentation, no remote control signal except shutdown signal is accepted. There is no presentation when no error occurs, only buzzer utters sound.


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Outdoor PCB Function Manual 1. Single-unit cooling operation

1.1When the single unit’s indoor unit gives a cooling signal, the corresponding outdoor

compressor carries out cooling operation. During the operation, the outdoor fan operates 1

second before the compressor operates.

1.2When changed from heating to cooling, the compressor stands by for 3 minutes, the

outdoor fan operates to blow off remaining heat and stops 30 seconds later.

1.3When the outdoor ambient temperature T1 38 , the outdoor fan runs at the high

speed. There is a return difference of 2 for the change between high and medium

speed.

When the outdoor ambient temperature T1 26 , the outdoor fan runs at the low

speed. There is a return difference of 2 for the change between low and medium

speed.

When the outdoor ambient temperature T1 8 , the outdoor fan is in a cycle of 1

minute stop and 3 minute run. There is a return difference of 2 for the change

between low speed and run and stop.

1.4Once the fan operates in a mode, it must operate for more than 45 seconds.

There is a temperature cut-off protection: when the indoor coil temperature higher than

T_CPS (68 ) and maintains for 10 seconds, both the compressor and outdoor fan stop.

The compressor will not restart in 3 minutes until the coil temperature lower than T_CP

R(50 ). The indoor fan is controlled the same as the thermostat is OFF.

2. Double-unit cooling operation

2.1When the indoor unit gives out a double unit cooling signal, outdoor compressor A starts

cooling operation. During the operation, the outdoor fan runs 1 second before compressor

A operates, 20 seconds later, outdoor compressor B starts cooling operation.

2.2Once a compressor starts, the other compressor will not start in 20 seconds from the

start.

2.3 When changed from heating to cooling, the compressor stands by for 3 minutes. When

both compressors are in the strand-by status, the outdoor fan stops. Otherwise, it operates.

The status of the fan depends on the number of the compressors that operate.


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2.4 When the outdoor ambient temperature T1 30 , the outdoor fan runs at the high

speed. There is a return difference for the change between high and medium speed;


speed. There is a return difference for the change between low and medium speed;

When the outdoor ambient temperature T1 5 , the outdoor fan is in a cycle of 1

minute stop and 3 minute run. There is a return difference of 2 for the change

between low speed and run and stop.

2.5Once the fan operates in a mode, it must operate for more than 45 seconds.

2.6 There is a temperature cut-off protection: when a indoor coil temperature higher than

T_CPS (68 ) and maintains for 10 seconds, the corresponding compressor stops. The

compressor will not restart in 3 minutes until the coil temperature lower than T_CP R(50 ).

The indoor fan is controlled the same as the thermostat is OFF.

2.7 In the case of double-unit cooling, one compressor stops and it changes to the

single-unit operation. The fan is controlled in the single-unit operation mode. It stops 30

after blowing off the remaining heat only if both compressors turn off at the same time.

3.Single unit heating operation:

3.1 When the single unit’s indoor unit gives a heating signal, the corresponding outdoor

compressor carries out cooling operation. During the operation, the outdoor fan and 4-way

valve operate 1 second before the outdoor fan operates.

3.2. When changed from cooling to heating, the compressor stands by for 3 minutes, the

outdoor fan stops.


speed. There is a return difference of 2 for the change between high and medium

speed.

When the outdoor ambient temperature T1 13 , the outdoor fan runs at the low speed.

There is a return difference of 2 for the change between low and medium speed.

3.4. Once the fan operates in a mode, it must operate for more than 45 seconds.

3.5. There is a high temperature protection and a temperature cut-off protection.

High temperature protection: When the indoor coil temperature higher than T_OFS (56 ),

the outdoor fan stops; when the coil temperature falls to T_OFR (52 ), the outdoor fan

restarts. The outdoor fan stops for more than 45 seconds.


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High temperature cut-off protection: When the indoor coil temperature higher than T_CPS

(68 ) and maintains for 10 seconds, both the compressor and outdoor fan stop, and the

indoor fan operates as the thermostat is Off. The compressor will not restart in 3 minutes

until the coil temperature lower than T_CP R(50 ).

4. Double-unit heating operation

4.1 When the double-unit’s indoor unit gives out a heating signal, outdoor compressor A

starts heating operation. During the operation, outdoor compressor A and the 4-way valve

operate 1 second before the fan starts, 20 seconds later, outdoor compressor B starts

heating operation.

4.2Once an outdoor compressor starts, the other compressor will not start in 20 seconds

from the start.

4.3 When changed from cooling to heating, the compressor stands by for 3 minutes. When

both compressors are in the strand-by status, the outdoor fan stops. Otherwise, it operates.

The status of the fan depends on the number of the compressors that operate.


speed. There is a return difference for the change between high and medium speed;


speed. There is a return difference for the change between low and medium speed.

4.5Once a fan operates in a mode, it must operate for more than 45 seconds.

5. Cooling and heating operations take place at the same time:

5.1 When one of the indoor units gives out a cooling signal and another unit gives out a

heating signal at the same time, the outdoor fan operates at the low speed.

5.2 When the indoor unit gives the value of coil temperature, the outdoor fan runs at the low

speed if the heating outdoor unit judges high load.

5.3When outdoor ambient temperature T1 28 , there is no heating operation.

5.4When outdoor ambient temperature T1 7 , there is no cooling operation.

5.5Once a compressor starts, the other compressor will not start in 20 seconds from the start.

6.Single-unit heating operation with heat load:

6.1 In the single-unit heating operation, the indoor unit gives out the value of the coil

temperature, and the outdoor unit judges whether to start in the high load protection operation


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based on the value of the coil temperature it has received. If the conditions for high load

protection are met, the outdoor fan stops immediately. It will restart 45 seconds later if the

signal for the outdoor heat load disappears. Otherwise, the outdoor fan will continue to stop

until the signal for the outdoor heat load disappears. The signal for heat load is as follows:

High temperature protection: When the indoor coil temperature higher than T_OFS (56 ), the

outdoor fan stops; when the coil temperature falls to T_OFR (52 ), the outdoor fan restarts.

The outdoor fan stops for more than 45 seconds.

High temperature cut-off protection: When the coil temperature higher than T_CPS (68 ) and

maintains for 10 seconds, both the compressor and outdoor fan stop, and the indoor fan

operates as the thermostat is Off. The compressor will not restart in 3 minutes until the coil

temperature lower than T_CP R(50 ).

6.2 In the single-unit heating operation, the current in the compressor is larger than 4.0 A(for

Model 14)(4.8A for Model 18), and the outdoor fan stops. 45 seconds later, the current in the

compressor is less than 3.5A(for Model 14)(4.3A for Model 18), and the outdoor fan operates

in normal condition(the compressor does not detect current within 30 seconds after its start),

the current in the compressor is larger than 3.5A(for Model 14)(4.3A for Model 18) and less

than 4.0A(for Model 14)(4.8A for Model 18), and the outdoor fan does not restore.

7.Double-unit heating operation with heat load

7.1 In the double-unit heating operation, the indoor unit gives out the value of the coil

temperature, and the outdoor unit judges whether to start in the high load protection operation

based on the value of the temperature it has received. If the conditions for high load protection

are met, the outdoor fan stops immediately. It will restart 45 seconds later if the signal for the

outdoor heat load disappears. Otherwise, the outdoor fan will continue to stop until the signal

for the outdoor heat load disappears. The signal for heat load is as follows:

High temperature protection: When the indoor coil temperature higher than T_OFS (56 ),

the outdoor fan stops; when the coil temperature falls to T_OFR (52 ), the outdoor fan

restarts. The outdoor fan stops for more than 45 seconds.

High temperature cut-off protection: When the coil temperature higher than T_CPS (68 )

and maintains for 10 seconds, both the compressor and outdoor fan stop, and the indoor

fan operates as the thermostat is Off. The compressor will not restart in 3 minutes until the


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coil temperature lower than T_CP R(50 ).

7.2 When the outdoor single-unit gives out the heat load signal, the outdoor fan stops

immediately, 45 minutes later, the heat load signal disappears, and the outdoor fan

operates.

7.3 In heating operation, any of the current in the compressor is larger than or equal to 4.0

A (for Model 14, 4.8A for Model 18), and the outdoor fan stops. The current in the

compressor is less than or equal to 3.5A (for Model 14, 4.3A for Model 18), and the

outdoor fan restores (the compressor does not detect current within 30 seconds after its

start), the current in the compressor is larger than 3.5A (for Model 14, 4.3A for Model 18)

and less than 4.0A(for Model 14, 4.8A for Model 18), and the outdoor fan does not restore.

8. Current peak protection

8.1. The current in the compressor is larger than 6.8A(for Model 14, 8.2A for Model 18) for

more than 5 seconds, The compressor which has the highest current will stop(the

compressor does not detect current within 10 seconds after its start) and 3 minutes later it

will continue to operate.

8.2. The compressor will no longer operate if overcurrent protection occurs 4 times in a row

within 30 minutes, and the output transformer signal fails. In the double-unit operation, if

one of the compressors stops due to the current too high, the other system is a single

system.

9. Single-unit defrosting operation (outdoor judgement)

Defrosting control

9.1. Conditions for starting in the defrosting operation

The heating compressor starts and operate continuously for 10 minutes. After the

compressor has been operating for 45 minutes in total, detecting the defrosting sensor TE

(detecting the frosting of the outdoor heat exchanger) and the outdoor ambient

temperature sensor TA for straight 2 minutes, provided the following conditions are met, it

will start for the defrosting operation: TE C TA

Where,

C: TA 0


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C=0.8

TA 0

C=0.6

=6

In the place where it tends to frost, it is preferred to choose H. In the place where it does not

intend to frost, it is preferred to choose L. It is set M at delivery.

During the defrosting operation, the temperature control starts -15 C TA -2

9.2. Interval of defrosting

When the result of the calculation from C TA falls in the range of -15 C TA ,

the interval between two defrosting operations is 45 minutes.

When the result of the calculation from C TA falls in the range of C TA <-15 , the

interval between two defrosting operations is 55 minutes.

9.3. Defrosting operation

At the beginning of defrosting, the compressor is halted for the first one minute, but the

outdoor fan operates, 50 seconds later, the 4-way valve is OFF.

9.4. Once starting to defrost, the compressor must be guaranteed at least 2 minutes of

operation before canceling defrosting. As for the conditions to cancel defrosting, it will restore

to the heating operation from the defrosting operation as long as any of the following

conditions is met.

(1) . The outdoor heat exchanger temperature is above 7 degrees for consecutive 80

seconds.

(2) . The outdoor heat exchanger temperature is above 5 degrees for consecutive 12

seconds.

(3) . The defrosting operation has lasted 9 minutes.

9.5 After the conditions for cancellation of defrosting are met, the following operations will

follow:

The compressor stops, the outdoor fan starts, 50 seconds later, the 4-way valve is engaged,

and 60 seconds later, the compressor operates.

10. Double-unit defrosting operation

After receiving the signal to stop the indoor unit during the defrosting period, the unit must not


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be turned off until the outdoor defrosting lasts more than 2 minutes.

When the double units are activated for defrosting, the activation of compressor B is 20

minutes later than that of compressor A.

Conditions for ending defrosting: It will restore to the heating operation from the defrosting

operation as long as any of the following conditions is met.

(1) . The temperatures on both outdoor heat exchangers are above 7 degrees for consecutive

80 seconds.

(2) . The temperatures on both outdoor heat exchangers are above 5 degrees for consecutive

12 seconds.

(3) . The defrosting operation has lasted 9 minutes.

The starting conditions and control process for the double-unit are same as that for single-unit

defrosting, the only difference is that the activation of compressor B lags that of compressor A.

11. Alarming operation

1. When the whole unit is in normal operation, the alarm light is always on, but does not

flash.

2. When the outdoor temperature sensor short-circuited or disconnected, the outdoor fan

always operates at the medium speed and will restore automatically after the sensor

comes to normal.

3. When the temperature sensor short-circuited or disconnected or the current transformer

fails, the alarm light flashes in the following manner; when the current transformer fails,

the signal is sent to the indoor unit that operates abnormally, and the corresponding

indoor unit indicates trouble:

Additional codes for overcurrent

LED light flashes once outdoor Eeprom in trouble

LED light flashes twice outdoor ambient temperature sensor in trouble

LED light flashes 3 times communication with indoor unit A in trouble

LED light flashes 5 times outdoor unit A’s coil in trouble

LED light flashes 6 times outdoor unit A’s CT current too high

LED light flashes 7 times communication with indoor unit B in trouble

LED light flashes 9 times outdoor unit B’s coil in trouble

LED light flashes 10 times outdoor unit B’s CT current too high


3526

ABNORMITY DIAGNOSE


3627

H2SM-14/18C03/R2

2 8

Codes and Description Code indication

indoor Description

Outdoor led1 blinks times

Power timer operate Operate heating cooling

★ ■ ■ Room temperature sensor failure --

★ □ □ Heat-exchange sensor failure --

★ □ ★ Indoor EEPROM error ---

■ □ ★ Indoor fan motor malfunction --

Indoor

Malfunction

■ ■ ★ Communication Error (between indoor and outdoor unit) 3 or 7

outdoor EEPROM error 1

★ □ ■ Outdoor Senistor Error 2

outdoor unit A’s coil sensor failure 5

Outdoor

Malfunction

outdoor unit B’s coil sensor failure 9

explanation □on★flash■off

Trouble Shooting ★ ■ ■: Room temperature sensor failure CN8 ★ □ □: Heat-exchange sensor failure CN8

YES

NO

YES

whether terminal CN8 on

indoor PCB contact wellt?

Pull out the terminals on the indoor mainboard and

reinsert them

Pull the sensor out of the mainboard

1) Measure the value of resistance Between its two

jumpers

2) Measure the temperature at the room temperature

sensing head.

Check the value of the

sensor to see whether the

sensor is damaged or not?

NO Sensor is broken,replace it with new sensor

The indoor PCB is broken, replace with new indoor PCB

H2SM-14/18C03/R2

2 9

★ □ ★: Indoor EEPROM error: Replace the PCB of indoor unit ■ □ ★:Indoor fan motor malfunction

Yes

Yes

YES

NO

whether terminal CN7

and CN11 on indoor PCB

well inserted or not?

Pull out and reinsert the terminals

Electrify the machine again and turn it on in the cooling

operation, Measure voltage between the positions 1 ( red

wire) and 5( black wire) of Terminal CN1 on the indoor PCB

NO the indoor pcb is damaged and need replace . the voltage is about

90-200vac

check whether motor

can run when

turn on the unit

the indoor motor is damaged and need

replace

NO

When motor is running Measure

whether there is voltage

pulse(0-5VDC) between the

positions 2 (middle wire) and

3( black wire) of Terminal CN7

on the indoor PCB

the indoor motor is damaged and need

replace

the indoor pcb is damaged and need replace

NO

H2SM-14/18C03/R2

3 0

LED1 of outdoor pcb flashes once: outdoor EEPROM error: Replace the PCB of outdoor unit, ★ □ ■ LED1of outdoor pcb flashes twice: Outdoor ambient Sensor failure CN1,

YES

NO

YES


outdoor PCB contact well?

Pull out the terminals on the outdoor mainboard and

reinsert them



jumpers

4) Measure the temperature of Outdoor ambient





The outdoor PCB is broken, replace a new one

H2SM-14/18C03/R2

3 1

■ ■ ★ :Communication fault between indoor and outdoor system

Yes NO Yes NO YES NO YES NO NO YES NO YES NO NO YES

Check whether the linking cable

between the indoor and outdoor

is not well connected

Reconnect the linking cable;

If unit A have error , please turn

on A and B both，check whether B

is fine

please reverse the outdoor

connecting wires A(C) and B (C)

between unit A and B,

if A is error and B is fine, indoor

unit A PCB is damaged

if A is fine and B has error,the

outdoor unit main PCB is damaged

please check whether the

connecting of L or N is reversed of

the two units

reconnect the L and N wires

Check whether the LED1

on the outdoor pcb is on the outdoor PCB is damaged

check whether the voltage of

CN7 in outdoor pcb is about

198-253VAC

check whether fuse of outdoor

pcb is broken reaplace the fuse with

T3.15A 250V

check whether the voltage of

CN4

in outdoor pcb is about 12VAC

check whether the wire from

terminal block to out pcb is well

connected

Reconnect the linking

wire

the transformer is bad

the outdoor PCB is damaged

H2SM-14/18C03/R2

3 2

LED1 of outdoor pcb flashes 5 or 9 times outdoor unit A or B’s coi sensor failure CN2

YES

NO

YES


outdoor PCB contact well?

Pull out the terminals on the outdoor mainboard and

reinsert them



jumpers

6) Measure the temperature of outdoor unit A or B’s coi





The outdoor PCB is broken, replace a new one

WIRING DIAGRAM


33


34938 34


4035

CIRCUIT DIAGRAM


436

H2SM-14/18C03/R2

3 7

1 2 3 4 5 6 7 8

A

B

C

D

87654321

D

C

B

A

R1710k

C12102

C13104

C16102

12345CN13

13 2

XT1

8M

R1510k

R2410K

R184.7k

R41 1K

R5210K

+5

C5 102

R30

10K

R28 1K

R27 10K

+5

R29 10K

Q22SC2412

Q12SC24121

2CN9

12 ZJ1

123

CN7

+5

C43103

+5VR50 51K

R14 1K

+5

IC10

TLP3526

123

CN1 C392UF 450V +5V

R57220

R42

345

678 1

2

IC2

24C02

+5

E6 4.7UF/50V

E7 4.7UF/50V

1234

CN8

R44 1K

R45 1K

R35 3.3K 1%

R3420K 1%

+5

C2 104

R46

1KC15102

C10102

C9102

Q4

2SC2412

SDASCL

123456789 10 11 12 13 14 15 16

IC42003

CD

BA

+12

C4

104

+5

C6

103/

50V

E5100u/16v

C18104/50V

+5

R65

10k

C36

103/50v

.

RL1JQ1A-12V

+12

R20 10K

+5

R10 10K

1234

CN6

R36 1K

R37 10K +5V

R8 10K

+5VR7 10K

C14104

BUZ1

BEEP-PKM13EPY-4002

Q52SC2412

R11

10K

R49100

R9 4.7K

R11M

R31

10K

+12V

C41102

R2 10K

R3 1K

C1102

+5V

02 IRQ

07

08 PTF4/TBCH0

PTF3/TBCH3

48

49

PTH1/KBD3

PTH1/KBD4

03 RST

21 VSS GND

GNDAVSS/VRE45

60 PTC0

PTF710

13 PTE0/TXD

56 VSSA GND

14 PTE1/RXD

PTE2/TACH015

25 PTG2/KBD2

PTE3/TACH11617 PTE4/SS18

19

20

PTE5/MISO

PTE6/MOSI

PTE7/SPSCK

PTC401

26PA0

27 PA128 PA229 PA330 PA431 PA532 PA633

PA738 PTB4

R3210K

50 PTD4

34PTB0/ATD0

35 PTB1/ATD1

394041424346

PTB5/ATD5PTD6/ATD6PTB7/ATD7PTD0PTD1PTD2

47PTD3

VDDAREF 44

0605PTF1/TACH3

PTF2/TBCH2

57 CGMXFC

5455

VDDAVREFH

59

58

OSC1

OSC2

51PTD5PTD6/TACLK 52

53626364

PTD7PTC2/MCLKPTC3PTC5

PTF0/TACH2 04

22

3637PTB3/ATD3

PTB2/ATD2

VDD

09 NC

61

2324

PTC1

PTG1/KBD1PTG0/KBD0

1CON1(red)

C19

104 MC68HC908AB32

+12v

R13 10K R12

10K

R2610K

5v

1112

PTF5PTF6

C7

104/

50V

C3103

C29104/50v

R53 1K

SW1

220V

-N

R594.7K

1CON2(white)

220V-L

220V-N

R66 27

C25102/50VC27102/50VC26102/50V

C47104/50V

E13100u/25v

R69 10KR68 10KR67 10K

R70 560R71 560R72 560

53

52

51

R88 560

C38102/50V

61

R1610k

+5

R21 10K

SW2

R73

10K

D6 1N4007

1

CON5

R81

330K 1/4W

R82

330 1/4W

C22

102R85 2.2K 1/4W

R87

10K 1/4W

+5

R8610K 1/4W

R80

2.2k 1/4WIC12

TLP421

+5R83

2.2K

1

N

C49103/50V

R84 6.8K 2WLED1

GREEN

+5

Q92SC2412

IC14TLP371

+51

2 4

56

1

23

4

D81N4007

Q3

2SC2412

R4 4.7KR38 10K+5VR39 4.7K

Q10

2SC2412

D7

RLS4148

R64 10K

R40 10K+5V

R8922K

R91

4.7K

5vSW3

R9210K

R93

10K

Q11

2SC2412

D1-D4

IN4007

FUSE3.15A

T1

D5

1N4007

E82200UF/25V

Z1

561K

C40

104/275V CN4

B2P3-VH-A

IC9

7805CN3

0-171825-3

CN2

RTB-1.5-2P

C35104

+12+5

C17104

R51

3.3K

Q82SB1197

R54680

R433.3K

1234567

CN5

SJ20-07WX

R47 560 1/4W

R5 10K

C24

0.01u/275V120 1W

L1

125uH

+5

R58 10K

R25

10K

R610K

R97

10K

R95

10K

R96

10K

R98

10K

R33

10K

5v

+5V

+5V

E4100u/16v

C28104/50V

+5

E15

470UF/16V

C42104/50V

+12

E9

100u/25v

4338

TROUBLE SHOOTING


4439




50

40

REFRIGERATING-CYCLE DIAGRAM


4641

Warning and cautions:

1.1 The multi-mounted split unit adopts double separated cooling systems (A and B) that are not connected together. If

the refrigerant leaks, the leaking system of them must be determined. So we can solute the abnormality. And refill the

system that lacks refrigerant. I t will influence the effect if the A and B systems are wrongly estimated.

1.2 The maximum length of single connecting pipe is 7m. And the units can't run normally if the pipe is over required

length.

1.3 Fill refrigerant in accordance with the diagram below if the connec ting pipe is over 5m.

Length 5m 7m ----

Outdoor unitHeat exchanger

B indoor unitHeat exchanger

A indoor unitHeat exchanger

A Compressor

A 4-way valve B 4-way valve

B Compressor

Capillary tubeCapillary tube

Capillary tube

Capillary tube

3- way valve

Cooling

Heating

3- way valve

2- way valve

2- way valve


42

NOISE LEVEL TEST CHART

& AIR VELOCITY DISTRIBUTION


4843


4944

B.Air velocity distribution


45

INSTALLATION & MAINTENANCE


46


47


48


49


50


Indoor unit B

Outdoor unit

NL

YEL/GRN

BRN

BLU{

PO

WER

YEL/GRNRED

WHT

BLK

WHTBLK

YEL/GRN

RED

13

2

12

3(C

)

YEL/GRNRED

WHT

BLK

WHT

BLK

YEL/GRN

RED

13

2

12

3(C

)

Indoor unit A

51


52


53


54


55

Documents

Service Manual H2SM-14 18HC03R2-SM080229