(Microsoft PowerPoint - [v 1.A] Ceiling Cassette [\310\243\310\257

$Page 1: (Microsoft PowerPoint - [v 1.A] Ceiling Cassette [\310\243\310\257$
Cassette

LG Air conditioning Academy

Air Conditioning Academy

Contents

1. Introduction1.1 What is Cassette?

1.2 Product Shape

1.3 Product background / Comparison

1.4 STP / Market Analysis

1.5 Nomenclature

2. Line Up2.1 Line Up

2.2 Specification

3. USP3.1 USP

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((((((((((((((((((((((((.. 05

(((((((((((((((((((((.. 06

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(((((((((((((..(((((((((((((((((.. 15

(((((((((((((..(((((((((((((((((.. 23

(((((((((((((((((((..((((((((((.. 26

Copyright 2010@LG Electronics / AC Company All Rights ReservedCassette 2

3.1 USP

3.2 Minor USP

3.3 Product Comparison with Old and New, another company

4. General Information4.1 Item Inside Product Box

4.2 Accessories Information

5. Product Details5.1 Cycle Diagram

5.2 Part & Dimensions

5.3 Control Parts

5.4 Wiring Diagram : Indoor Unit

5.5 wiring Diagram : Outdoor unit

(((((((((((((((((((..((((((((((.. 26

(((((((((((((((((((..((((((((((.. 36

(((((((((((.. 37

((((((((((((((((((((((((.. 40

((((((((((((((((((((((((.. 41

(((((((((((((((((((((((((((.. 43

(((((((((((((((((((((((((((.. 45

(((((((((((((((((((((((((((.. 47

((((((((((((((((((((((((.. 49

((((((((((((((((((((((((.. 50

6. Installation6.1 Installation Scene

6.2 Installation of Outdoor Unit

6.3 Installation of Indoor Unit

6.4 Piping & Wiring of Outdoor Unit

6.5 Piping & Wiring of Indoor Unit

7. Start up7.1 Checking point

Contents

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(((((.(((((((((((((((((((..53

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((((((((((((((((((((((.. 62

((((((((((((((((((((((.. 70

((((((((((((..(((((((((((((((.. 71


8. Control logic8.1 Basic Features

8.2 Compressor control

8.3 Fan Control

8.4 Defrost Control

8.5 EEV Control

8.6 PCB Details

9. Troubleshooting9.1 Error code

9.2 Trouble shooting

((((((((..((((((((((((((((((.. 72

((((((((..((((((((((((((((((.. 76

((((((((..((((((((((((((((((.. 82

((((((((..((((((((((((((((((.. 85

((((((((..((((((((((((((((((.. 88

((((((((..((((((((((((((((((..93

((((((((..(((((((((((((((((((.. 98

((((((((..(((((((((((((((((((.. 102

0. Product Introduction

LG’s "Ceiling Cassette" is a indoor unit which is installed for a significant purpose. The ceiling

cassette is used for commercial purposes. It can be installed in various places such as

restaurants, hotels, offices and meeting rooms.

1.1 What is Cassette? 1. Introduction

Cassette


1.2 External Appearance 1. Introduction

1-WAY CST 2-WAY CST

Single CST systemSingle CST system

4-WAY CST

Depending on the direction of air flow 1 / 2 / 4 WAY cassette, classified as follows


0.8~2.5hp 2.0~2.5hp 2.0~5.0hp

1.3 Product Background 1. Introduction

Multi (All in 1)Single Split

Cassette

Cassette

Air Cooled SystemAir Cooled System


Cassette


Air Cooled System

Multi V AHU (VRF)Multi V (VRF)



Water Cooled System

Multi V Water (VRF)



Indoor Unit

DuctDuct4way

Cassette2way

Cassette1way

CassetteART1way



Ventilation System Network Solution

16-CentralController

Function Control

64-CentralController

PC-CentralController


HomeNetwork

BMS

AHU

PDI

1.4 STP / Market Analysis 1. Introduction

School Office


Home Commercial

1.5.1 Global (New version)

1.5 Nomenclature 1. Introduction

Serial number

FunctionA : Basic C: Plasma air purifierE : Elevation F : Elevation grille + plasma air purifier

Decoration PanelL : Basic panel


L : Basic panel

Chassis name

Electric rating6:1Φ 220V-240V,50Hz

Cooling/heating capacityEx) 12 → 12,000 Btu/h

Model typeC : Cooling only H : Heat pump

Type of air conditionerAT : Ceiling cassette using R410A

1.5 Nomenclature 1. Introduction

1.5.1 Global (Old version)

LT E 12 6 0 F L

Function

L : Basic A : Plasma air purifier

Model type

F : Cooling only R : Heat pump


F : Cooling only R : Heat pump

Serial number

Electric rating

6 : 10, 220V-240V, 50Hz

Cooling/heating capacity

Ex) 12 →12,000 Btu/h

Chassis name

Type of air conditioner

LT : LG ceiling cassette

1.5 Nomenclature

1.5.2 Europe

1. Introduction

U T 2 4 N N D

Serial number

Chassis name

Indoor unit


Cooling / Heating capacity (kBtu/h)

Type

T : Cassette, B : Duct,

V : Convertible, Q : Console

U : Universal model

Model type

U : Universal model

2.1 Line up 2. Line up

2.1.1 Outdoor units - 50Hz,R410A

Cooling onlyAT-C1260CLC0

[T11ACP SC0]

LT-E1860FA

[T18ACP SE0]

LT-E2460FL

[T24AC SE0]

LT-D2860FL

[T28AC SD0]

No. Connectable indoor units 1

Total capacity index of

connectable indoor units

kW 3.52 5.28 7.03 8.21

kBtu/h 12 18 24 28


kBtu/h 12 18 24 28

Power supply 1ø, 220-240V, 50Hz

Chassis

2.1 Line up

2.1.1 Outdoor units - 50Hz,R410A

2. Line up

Heat pump AT-H126CLC0

[T11AHP SC0]

LT-E1860RL

[T18AH SE0]

LT-D2860RL

[T28AH SD0]

No. of connectable indoor units 1



kW 3.52 5.28 8.21

kBtu/h 12 18 28


Power supply 1øøøø, 220-240V, 50Hz

Chassis


2.1.2 Outdoor units - 50Hz,R22

Nominal Capacity Model Power Supply

kW kBtu/h Model Name Refrigerant ØØØØ,V,Hz

5.318

HT-C186HLA0

HT-C186HLA1

1øøøø, 220-240v, 50Hz

7.0 24

HT-C246HLA0

HT-C246HLA1


R22

1øøøø, 220-240v, 50Hz

8.8 30 HT-C306HLA0

10.6 36HT-C368DLA0

HT-C368DLA1

3øøøø, 380-415v, 50Hz14.1 48

HT-C488DLA0

HT-C488DLA1



Model nameLT-C182QLE0

LT-H182QLE0

LT-C242PLE0 LT-H242PLE0 LT-C302PLE0

LT-H302PLE0




kW 5.28 7.06 7.06 8.79

kBtu/h 18 24.1 24.1 30


Power supply 1øøøø, 220V, 60Hz

Chassis

2.1 Line up


2. Line up

Model nameLT-C362NLE0

LT-H362NLE0LT-C482MLE0 LT-H482MLE0

LT-C602MLEO

LT-H602MLE0




kW 10.55 14.06 14.06 17.58

kBtu/h 36 48 48 60

Power supply 1øøøø, 220V, 60Hz


Chassis

2.1.4 Indoor Units – 50Hz,R410A


Category Type Chassis

Model names

Capacity, kW (kBtu/h)

3.52

(12)

5.28

(18)

7.03

(24)

8.21

(28)

1-way TC

AT-C126CLC0

[T11ACP SC0]

AT-H126CLC0

[T11AHP SC0]


Ceiling

cassette

[T11AHP SC0]

4-way

TE

LT-E1860FA

[T18ACP SE0]

LT-E1860RL

[T18AH SE0]

LT-E2460FL

[T24AC SE0]

TD

LT-D2860FL

[T28AC SD0]

LT-D2860RL

[T28AH SD0]


2.1.5 Indoor Units – 60Hz,R22


Model names

Capacity, kW(kBtu/h)

5.28(18)

Ceiling

cassette4-way TQ

LT-C182QLE0

LT-H182QLE0



Model names


7.06(24.1) 8.79(30)

Ceiling

cassette4-way TP

LT-C242PLE0

LT-H242PLE0

LT-C302PLE0

LT-H302PLE0


2.1.5 Indoor Units – 60Hz,R22


Model names


10.55(36)

Ceiling

cassette4-way TN

LT-C362NLE0

LT-H362NLE0



Model names


14.06(48) 17.58(60)

Ceiling

cassette4-way TM

LT-C482MLE0

LT-H482MLE0

LT-C602MLE0

LT-H602MLE0

2.2 Specification 2. Line-up

Indoor unit type Ceiling Cassette –––– 1way

Model AT-C126CLC0 [T11ACP SC0]AT-H126CLC0

[T11AHP SC0]

Power supply øøøø/V/Hz 1 / 220~240 / 50 1 / 220 / 50

Cooling capacitykW 3.52 3.52

Btu/h 12,000 12,000

Heating capacitykW - 3.52

Btu/h - 12,000

Current Nominal running current A 0.56 0.56


Note: Refer PDB for the specifications of all the models.

Fan

Motor type Induction Induction

Fan type Cross flow fan Cross flow fan

Motor output(W)x number of unit 14 x 1 14 x 1

Air flow rate (H/M/L)

cmm 10/9/8 10/9/8

cfm 353/317/283 353/317/283

Capacitor µF/Vac 0.9/400 0.9/400

Drive Direct drive Direct drive

Coil Row x stages x FPI mm 2R x 11C x 18 2R x 11C x 18

Indoor unit type Ceiling cassette 1-way

Model AT-C126CLC0 [T11ACP SC0] AT-H126CLC0 [T11AHP SC0]

Dimensions

(WxHxD)

Body mm(inch) 860*390*180(33.8*15.3*7.0) 860*390*180(33.8*15.3*7.0)

Decorative

panel

Mm(inch) 1050*390*180(33.8*15.3*7.0) 1050*390*180(33.8*15.3*7.0)

Weight Body Kg(lbs) 22(48.5) 22(48.5)

Decorative Kg(lbs) 3(6.6) 3(6.6)



Decorative

panel

Kg(lbs) 3(6.6) 3(6.6)

Air filter Long life filter Long life filter

Sound level (H/M/L) dB(A)+3 38/35/32 38/35/28

Piping

connections

Liquid Mm(inch) 6.35(1/4) 6.35(1/4)

Gas Mm(inch) 12.7(1/2) 12.7(1/2)

Note: Refer PDB for the specifications of all the models.


1. Capacities are based on the following conditions :

Drain OD/ID mm 32/25 32/25

Dehumidification rate l/h 1.5 1.5

Safety devices Fuse, Thermal protector for fan motor

Temperature sensor Thermistor Thermistor

Referigerant R410A R410A

Referigerant control Capillary tube Capillary tube

Connectable outdoor unit Single Single

Power and transmission interunit cable No.x mm₂₂₂₂ 4 * 0.75 6 * 0.75


1. Capacities are based on the following conditions :

Cooling : - Indoor Temperature 27(80.6) DB /19(66.2) WB

- Outdoor Temperature 35(95) DB /24(75.2) WB

Heating : - Indoor Temperature 20(68) DB / 15(59) WB

- Outdoor Temperature 7(44.6) DB / 6(42.8) WB

Piping Length : - Interconnection Piping Length 7.5m

- Level Difference of Zero.

Conversion Formula

kW = Btu/h x 0.0002931

CFM = CMM x 35.3

3.1 USP 3. USP

- Individual 4 Way airflow control.

- Lowest noise - World’s best.

- Wide Jet Vane

- Whirlwind operation mode

- Auto operation elevation grill

- Wide LCD wired remote controller with features.

3.1.1 Product USP for Customer & Installer

Customer


- 4 Way corner-separating panel

- Simple installation

- Easy SVC and Convenient maintenance

- Additional function

Installer

3.1.2 Optimized airflow with a customer matching design

3.1 USP 3. USP

4 Way airflow control (1Vane 1Motor)

60˚ 30˚

40˚


20˚

Need Direct

air flow Need indirect

air flow

3.1 USP 3. USP

3.1.3 Wide Jet Vane

High cooling – heating and optimized air flow

Improved wide vanes reduce dead bands and provide better air and temperature distribution.


3.1.4 Independent installation, Filter alarm, Simple setting

3.1 USP 3. USP

- Big Font to see even from a distance

- Large wide LCD for easy check

- Easy installation (Easily hanged Type)

New Wired Remote controller


Filter cleaning time display at the wired remote controller

Filter Alarm

“ ”

3.1 USP 3. USP

3.1.4 Independent installation, Filter alarm, Simple setting

Easy Setting, Independent Remote Controller Installation


Single indoor unit can be controlled from

2 remote controllers

Remote controller function setting

- Low, standard, high, high-high ceiling

- ESP

- Remote controller Sensor

3.1.5 Additional Features

3.1 USP 3. USP

Airflow can reach even from a height of Max. 4.2 m

Extra high ceiling Mode

A 4.2m maximum high ceiling mode is available

with the support of the indoor unit fan position

control algorithm design. This setting offers a

reduction of droughts.


Strong and fire prevention indoor cover design

Fire Prevention Design

Competition design

3.1.6 Convenient Installation

3.1 USP 3. USP

Detachable corner part-Easy hanger adjustment and drain pipe leak checking .

Refrigerant

pipe

Easy leak

check from

Detachable corner part

<Hanger adjustment>


Easy

hanger

adjustment

Easy hanger

adjustment

pipe

connection

checking

check from

drain pipe

connection

<Drain / leak check>

4

3.1.7 Improvement in Installation

3.1 USP 3. USP

Less installation time

Elbow-Less Vs One Touch Drain-Hose (Optional)


Easy setting of the panel and thus easy installation of the front panel

making easy product installation

One Touch Panel Setting Method

43.1 USP 3. USP

Parallel piping make easy installation ability .

Gas pipe / Liquid pipe no interaction

Simple, Rational Connecting Piping Position and Direction

3.1.7 Improvement in Installation


4

3.1.8 Artificial Intelligence Elevation Grill (Optional)

3.1 USP 3. USP

Max. 4.5m

• Automatic elevation grille make it easy to clean filter and to keep

IDU clean

Automatic elevation grill (option)


3. USP

MAR COM

3.2.1 Lowest Noise - World’s Best

High Efficiency turbo fan BLDC MOTOR

- Orifice & air flow optimization design

- Removal of abnormal noise through high efficiency turbo fan

- Resonance noise removal by anti vibration design & BLDC motor

3.2 Minor USP

BLDC Motor

5dB(A) decrease

10dB(A) decrease Other AC Motor


Strong design indoor unit Base Pan Decaweb structure design

BLDC Motor

Low-low Low Mid High Power Wind

Airflow

Variable

range

70% 90% 100% 110% 130%

4

3.3.1 Swirl Swing

Swirl swing distributes air evenly throughout the room to ensure a more comfortable

conditioned environment by adjusting the movement of the louvers.

3.3 Product Comparison 3. USP


3.3.2 Wide Jet Air Flow

Improved wide and narrow vane will provide comfortable temperature distribution

without air flow dead zone.

3. USP3.3 Product Comparison

Current New Cassette

Air flow dead zone Even air distribution


The new outlet design can reduce ceiling contamination from air current flowing along the ceiling.

3.3.3 Design to Reduce the Ceiling Stains

3. USP3.3 Product Comparison


4.1 Item Inside Product Box

4.1.1. Indoor Box

4. General Information

1 Indoor Unit

2 Owners Manual

3 Installation Manual

4 Remote Controller

5 Etc.

4.1.2. Outdoor Box

1 Outdoor Unit

2 Owners Manual


2 Owners Manual

3 Installation Manual

4 Etc.

4.2 Accessories 4. General Information

4.2.1 For end user


4.2 Accessories 4. General Information

4.2.2 For Installer

Name Drain hose Clamp metal

Washer for

hanging

backet

ClampInsulation for

fitting (other)

• Paper

pattern for

installation

• Owner’s

Quantity 1EA 1EA 8EA 8EA 1SET


Owner’s

manual

•

Installation

manual

Shape For gas pipe

For liquid pipe

5.1.1 Cycle diagram

5.1 Cycle Diagram 5. Product Details

Example. LTExample. LT--H362NLE0H362NLE0


LOC. Description PCB Connector

Th1 Thermistor for indoor air temperature CN_ROOM

Th2 Thermistor for evaporating temperature CN_PIPE1

5.1.1 Cycle diagram

5.1 Cycle Diagram 5. Product Details



LOC. Description PCB Connector

Th3 Thermistor for condensing temperature Deice PCB

5.2 Dimensions (Indoor) 5. Product Details



Note: Refer PDB for more details of all the models.

5.2 Dimensions (Outdoor) 5. Product Details




5.3 Control Parts (Indoor) 5. Product Details

Example. LT-H362NLE0

CN-KPUMP

CN-FLOAT

CN-MOTORCN-DISPLAY

CN-OPTION

CN-ROOM


CN-POWERCN-VANE2 CN-VANE1 CN-REMO CN-PIPE1

5.3 Control Parts (Outdoor) 5. Product Details


3Min. Delay PCB Comp Capacitor Fan Capacitor

Magnetic

Switch


Terminal Block

5.4 Wiring Diagram: Outdoor Unit 5. Product Details



5.5 Wiring Diagram: Indoor 5. Product Details


CAUTION

Don’t touch the motor

connector

While the unit is operating

It may result in motor

malfunction




Construction work Air conditioning work

Setting sleeve and insert work details

Fitting of steel sleeves

Moulding box and

reinforcement work

Preparation of

contract drawing

Removal of moulding boxes

Sleeve and insert work

Installation of indoor unit


1. The division of the work should be

thoroughly clarified.

2. Keep a constant check on the

progress of the construction work to

avoid deviations from the air

conditioning work schedule.

Removal of moulding boxes

Refrigerant piping work

Drain piping work

Duck work

Insulation work

Electrical work

Construction work


Building rooftop Electrical work

Outdoor unit foundation work

Installation of outdoor unit

All tight test

Vacuum drying


1. The division of the work should be

thoroughly clarified.

2. Keep a constant check on the

progress of the construction work to

avoid deviations from the air

conditioning work schedule.

Energization

Cleaning inside and outside

Additional charge of refrigerant

Fit decoration panels

Test run

T.A.B and final report

Transfer to customer

with explanation

6.2 Installation of Outdoor

6.2.1 Safety Precautions

6. Installation

The meanings of the symbols used in this manual are as shown below.

This symbol indicates the possibility of death or serious injury.

This symbol indicates the possibility of injury or damage to properties.


Please strictly follow the instructions given in the Installation manual .Improper installation by ignoring

the instructions can lead to damage to life and property.

Make sure to read the following safety instructions very carefully and thoroughly .



6.2.2 Foundation

6. Installation

LT-C182QLE0

LT-C242PLE0


LT-C242PLE0

LT-C302PLE0

LT-C362NLE0

LT-H182QLE0

LT-H242PLE0

LT-H302PLE0

LT-H362NLE0

<Basic intensity>

Bolt FactorBolt FactorBolt FactorBolt Factor M10M10M10M10---- J typeJ typeJ typeJ type

Concrete height 100mm of more

Bolt inserted depth 70mm of more



6.2.3 Settlement of outdoor unit

6. Installation

Bolt construction work Settlement draw of outdoor units


• Anchor the outdoor unit with a bolt and nut tightly and horizontally on a concrete or rigid mount.

• When installing on the wall, roof or rooftop, anchor the mounting base securely with a nail or wire

assuming the influence of wind and earthquake.

• In the case when the vibration of the unit is conveyed to the house, secure the unit with an anti-vibration

rubber.



6.2.4 Selection of best location

6. Installation

This Single A unit is suitable for installation in a residential and commercial environmental areas.

If installed near a household appliance it can cause electromagnetic interference.

The units should be installed in a location that meets the following requirements:

① A robust and strong base which can support the weight of the unit and will not degrade easily

② If an awning is built over the unit to prevent direct sunlight or rain exposure, make sure that the

discharge air of the condenser is not restricted.

③ It is recommended that the outdoor unit should be fenced to avoid animals or plants being

exposed in the direct path of the discharged air .

④ Ensure proper spaces between the unit and its surrounding as given in the figure.


④ Ensure proper spaces between the unit and its surrounding as given in the figure.

⑤ Ensure that the water shall not cause any damage by overflowing in case of water condensation

⑥ The noise, vibration and hot discharged air of the outdoor unit should not annoy the surrounding

environment.

⑦ Ensure that there is no damage to the pipes in long run as it may cause the refrigerant leakage.

⑧ In case the outdoor may have heavy snow :

a. Make foundation at a suitable height.

b. Fit a suitable hood or a awning over the unit.

⑨ Rooftop Installations : If the outdoor unit is installed on a roof structure, be sure to level the unit.

Ensure the roof structure and anchoring method are adequate for the unit location. Consult

local codes regarding rooftop mounting.



6.2.5 Clearance Space

6. Installation

Ensure that the space around the back is more than 300 mm on the opposite to the PCB side and secure 600 mm space near the compressor and PCB side of the air conditioner for service.




6.2.6 Clearance of side discharge

6. Installation

Case 1. Where there is an obstacle on the air intake side: (Unit: mm)

No obstacle above Obstacle on the air intake side, too

100 or more


Obstacle on the both sides Obstacle on the air intake side,

and both sides

100 or

more

Case 2. Where there is an obstacle on the discharge side: (Unit: mm)

No obstacle above Obstacle above, too

6. Installation

6.2.6 Clearance of side discharge


1000 or more



6.3 Installation of Indoor 6. Installation

• There should not be any heat source or steam

near the unit.

• There should not be any obstacles to the air

circulation.

• There should be provision of easy condensate

drain.

• Taking into account the noise prevention criteria,

spot the installation location.

• Do not install the unit near the door way.

6.3.1 Selection of best location


• Do not install the unit near the door way.

• Keep proper distances, of the unit, from ceiling,

fence, floor, walls and other obstacles as shown

in figure.

• The indoor unit must have sufficient

maintenance space


6.3 Installation of Indoor 6. Installation

6.3.2 Indoor unit installation

• Attach the hanger bracket to the

suspension bolt.

Be sure to fix it securely by using a nut

and washer from the upper and lower

sides of the hanger bracket

• The following parts are locally purchased.

Flat washer for M10

(accessory)

Flat washer for M10

(accessory)

Nut

Hanging bolt

(W3/8 or M10)

Nut

(W3/8 or M10)

Spring waster

(M10)


- Hanging Bolt - W 3/8 or M10

- Nut - W 3/8 or M10

- Spring Washer - M10

- Plate Washer - M10

Nut

(W3/8 or M10)

Keep the distance

Of the bolt

From the bracket

to 40mm or more Air conditioner body

False ceiling

Adjust the same height

Ceiling


6.4 Piping & Wiring: Outdoor

6.4.1 Connecting pipe to Outdoor

6. Installation

1) Align the center of the piping and

sufficiently tighten the flare out by

hand.


2) Finally, tighten the flare nut with torque

wrench until the wrench clicks.

When tightening the flare nut with torque

wrench, ensure the direction for tightening

follows the arrow on the wrench.

6.4.2 Electrical Wiring

6.4 Piping & Wiring: Outdoor 6. Installation




6.4.3 Method of connecting power cable


No need of independent power supply for the indoor units.

Power suppy

Circuit breaker


Outdoor unit Indoor unitEarth wire


6.4.4 Leakage Test


System sample

Do not open the

service valve

during

the airtight test.


6.4.4 Leakage Test


[Check 1] (Where pressure falls while carrying out Steps 1 to 3 described on previous page)

• Check by measure gage......Gas detector.

• Check by ear......Listen for the sound of a major leakage.

• Check by hand......Check for leak by feeling around jointed sections with hand.

• Bubble check ......Bubbles will reveal the presence of a leakage.


[Check 2] (When searching for a minor leak or when there has been a fall in pressure while the system

has been fully pressurized but the source of the leak cannot be traced.)

• Release the nitrogen until the pressure reaches 0.3MPa.

• Increase pressure to 1.5MPa using gaseous refrigerant(R410).

• Search for the source of the leakage using a leakage detector such as a halide torch or a propane or

electronic detector.

• If the source of the leakage still cannot be traced then re-pressurize with nitrogen up to 3.8MPa and

check again. (The pressure must not be increased to more than 3.8MPa.)

6.4.4 Leakage Test


Important points

Where the lengths of piping involved are particularly long then the air tight test should be carried

out block by block.

- Indoor side

- Indoor side + vertical pipes

- Indoor side + vertical pipes + outdoor side



6.4.5 Vacuum drying


There are two vacuum drying methods and appropriate method should be chosen always to confirm with

individual local conditions.

[Normal vacuum drying]........The standard method

[Operational steps]

1. Vacuum drying (1st time): Connect a manifold gauge to the service port of the liquid or gas pipe and

operate the vacuum pump for at least 2 hours.

(The degree of vacuum produced should be in excess of 5 Torr)

If after 2 hours the vacuum produced has not exceeded 5 Torr then either there is moisture in the

pipe or there is a leak.


pipe or there is a leak.

Operate the vacuum pump for further one more hour.

If, even after 3 hours, the vacuum has not reached 5 Torr then check the system for a leak.

2. Carry out vacuum test.

Produce a vacuum in excess of 5 Torr and do not release it for an hour or more. Check the vacuum

gauge to make sure that it has not risen. (If the gauge rise then there is still moisture in the pipe or

there is a leak somewhere.)

3. Additional charge of refrigerant.

Connect the charging cylinder to the liquid pipe service port and charge with the required amount of

refrigerant.

4. Open stop valve to the full.

Open the stop valve on the liquid and the gas pipes to the full.

6.4.5 Vacuum drying



- Vacuums should be produced in both the

liquid and the gas pipes.

(Because there are a large number of

functional components in the indoor unit

which cut off the vacuum mid-way

through)

6.5 Piping & Wiring: Indoor Unit 6. Installation



7.1 Checking point

7.1.1 Checks Before Test Run

7. Start up

Wrong power wiring, loosed screws

Wrong control transmission wiring, loose

screws

Piping size , presence of thermal insulation

Measurement of main power circuit insulation

Use a mega-tester


Addition or refrigerant if required

Fully open respective stop valves on liquid, gas

Turn on outdoor unit power

Be sure to record the

additional quantity of

refrigerant

8.1 Basic Features 8. Control logic

Tin

Tsuc(Tout)

Tdisp

Discharge

Superheat

Sub cooling

(heating)Tdisp

ToutTin

Tsuc

EEVTpipe

Outdoor unit

Heat Exchanger

Feedback Control P-h diagram


Superheating

(cooling)Indoor unit

Heat Exchanger

EEVTpipe

Cooling mode Heating mode

Tout Evaporator outlet Condenser inlet

Tin Evaporator inlet Condenser outlet

T pipe Condenser out Evaporator inlet

Tsuc Compressor suction Compressor suction

TdispCompressor

discharge

Compressor

discharge


8.1.1 Cooling Mode

1. Control Factor

- In cooling mode, the main control factor is superheating.

→ Superheating is Tout – Tin , and this value is different as per types of indoor units and their capacity.

- Discharge T limit control, when the system operated in low temperature,

we increase the temperature of cycle.

2. How To control

- Check the operating indoor units capacity.

- Check the room temperature (Judging operating condition : Normal, Low ambient, Overload()



- Check the outdoor temperature

(1) Judging operating condition : Normal, Low ambient, Overload(

(2) Fan speed of outdoor unit decision

- Check the temperature gap between room temp. and set temp.

(Compressor operating ratio: 60 ~ 120 %)

- Compressor operating frequency, EEV open degree and superheating decision

- Compressor operate and EEV open according to starting control algorithm

- After starting, EEV is controlled in every 2 minutes to adjust EEV pulse till target

superheating is obtained

1. Control Factor

- Main control factor is Suction Super-heating control

→ super-heating is Tsuc – Tpipe, the target value of suction super-heating different according to

outdoor temperature and capacity of indoor operating.

- Sub control factor is IDU-distribution control. After checking the differences of each room condition,

- Discharge T limit control, when the system operated in low temperature, we increase the

temperature of cycle.


8.1.2 Heating Mode


2. How To control

- Check the summation of the operating indoor units capacity.

→ Super-heating changes according to indoor units capacity


- Check the outdoor temperature

(1) Judging operating condition : Normal, Low ambient, Overload(

(2) Fan speed decision

- Check the temperature gap between room temp. and set temp.

(Compressor operating ratio : 60 ~ 138 %)


8.1.2 Heating Mode


(Compressor operating ratio : 60 ~ 138 %)

- Check compressor input voltage (Compressor operating frequency decision)

- Compressor frequency, EEV open degree and superheating decision.

- Finally, compressor operate and EEV open according to starting control algorithm

- After starting, EEV is controlled in every 2 minutes to adjust EEV pulse till target sub-cooling

is obtained.

- Check condenser’s pipe temperature in every 30~45min and in case of freezing condition,

operating mode converts from heating to cooling.

- In about every 3 hours, operating mode converts from heating to cooling to return the oil.

System Indoor Outdoor Calculation of Start Continues

To & fro

feedback

Indoor temperatureIndoor capacityIndoor On/OFFSelected fan speed

OutdoorTemperature

Basic formula of calculationCompressor setting

Stop

8.2 Compressor Control 8. Control logic

Process

8.2.1 Frequency Control


Frequency that corresponds to each rooms capacity will be determined according to the difference in

the temperature of each room and the temperature set by the remote controller.

There are various factors determining the frequency.

1. Indoor unit capacity value.

2. Temperature compensation factor

3. Initial frequency setting

System

ON/Setting

Indoor

dataOutdoor

data

Calculation of

set frequency

Start

systemContinues

check

Stop

system

System

error

8.2.2 Compressor Basic Principle

8. Control logic8.2 Compressor control

IPM (Inverter)

120 f

P

RPM → revolutions/minute

f → Frequency

P → Number of poles

RPM =

BLDC motor


BLDC Motor

EMF

MCU

(16Bits)

Position

Detect

Circuit

U

V

W

UVWXYZ

Basic principle is to control the rpm of the motor by changing the working frequency of the input current. Three

phase voltage is supplied to the motor and the time for which the voltage will supplied is controlled by IPM

(intelligent power module).

Switching speed of IPM defines the variable frequency input to the motor.

P → Number of poles


8.2.3 Inverter compressor Starting

Target

frequency

(Hz)

Step B

Step C

Step DStep E Target frequency

Inverter


: Target Step calculation method

Step A = Step 1 Frequency (Min. frequency :20~25Hz)

Step B = (Step A + Target STEP) / 2

Step C = (Step B + Target STEP) / 2

Step D = (Step C + Target STEP) / 2

Step E = (Step D + Target STEP) / 2

30 150 180 210 240

Step A

Time (sec)

8.2.4 Step (frequency) control :Primary step setting


Comp_Step = (Step_base+Long piping compensation) x ∆Step_TAO x ∆Step_TAI x ∆Step_DTAI

Step_base Standard frequency step by ΣQj (Summation of capacity code)

Long piping Comp. Step compensation by setting long piping ( 3 Hz )

∆Step_TAO step compensation by TAO (Outdoor temp.)

: Capacity steps of compressor are decided by ΣQj (Summation of capacity code), TA0(Outdoor temp.),

TAI(Indoor temp.), DTAI (Step Compensation of temperature difference Indoor Temp. and Setting Temp.


∆Step_TAO step compensation by TAO (Outdoor temp.)

∆Step_TAI step compensation by TAI (Indoor temp.)

∆Step_DTAI Step Compensation of temperature difference Indoor Temp. and Setting Temp.

※ The compressor get the minimum step in case Step_base value is lower than the minimum step

of operating capacity.

※ Target frequency step (Step_base) exceeds maximum step, the Step_base value follows the

maximum step value.

Workingratio

100%(Option)

8.2.5 Step (frequency) control :Setting Value / Cooling


step compensation by Outdoor temp. step compensation by Indoor temp.

∆Step_TAO ∆Step_TAI

Workingratio

100%(Option)


Lowambient

Pulldown

Over load

Temp.()

Note ∆Step_DTAI : Step Compensation of temperature difference Indoor Temp.

and Setting Temp.(40-110%)

Temp.()

8.2.6 Step (frequency) control :Setting Value / Heating


Working

ratio

step compensation by Outdoor

temp.

step compensation by Indoor

temp.

Step Compensation of

temperature difference

Indoor Temp. and Setting

Temp.

2.5

MPS Multi

(Heating)

1.15

Working

ratio

∆Step_TAO ∆Step_TAI ∆Step_DTAI


23 2818

85%

100%

75% Over load

Standard condition

3

Temperature (°°°°c)

Low

Temperature

working

130%

1.5

0.5

0

0.5

-1.5

-2.5

2.5

1

0.8

0.6

0.6

0.6

0.6

0.6

10 324

Low

Temperature

working

50%

80%

100%

-18

70%

Temperature (°°°°c)

140%

Standard condition

Over load

8.3 Fan Control 8. Control logic

Control logic of outdoor fan depends on two factors

a) Outdoor temperature.

b) Total indoor units capacities.

1) Single fan model 2) Two fan model

Function

8.3.1 Outdoor Fan Control

Step_Fan Fan A Step_Fan Fan (A) Fan (B)


2 High

1 Low

0 X

4 High High

3 Low Low

2 High X

1 Low X

0 X X

8.3 Fan Control8.3 Fan Control 8. Control logic

1) Outdoor temperature basis outdoor fan control for cooling mode

Operating process

Control logic of outdoor fan depends on outdoor temperature


Cooling Single FANOutdoor

temperatureCooling two FAN

Step_Fan + 1 41

38

28

22

Step_Fan + 2

Step_Fan + 1

Step_Fan Step_Fan

Step_Fan －－－－ 1


2) Outdoor temperature basis outdoor fan control for heating mode

22

10Step_Fan －－－－ 1 Step_Fan －－－－ 2

Step_Fan －－－－ 3

Heating Single FANOutdoor

temperatureHeating two FAN

Step_Fan -120

14

4

-3

Step_Fan -2

Step_Fan -1

Step_Fan Step_Fan

Step_Fan +1Step_Fan +1

Step_Fan +2

Inv. COMP

(T2=0)

(T1=0)

Outdoor pipe temp

Const. COMP

O/D fan Set speed Off OffSet speed Set speed

8.3 Fan Control8.3 Fan Control 8. Control logic



3) Abnormal cooling: Suction temperature is lower than 0°C at that situation outdoor fan runs at

minimum speed due to which the suction pipe temperature rise gradually

to reach more that 4°C. (Low ambient cooling control)

4) Abnormal heating : If the condenser pipe temperature is more than 15°C then control will go like this

a) Outdoor pipe temperature > 15 °C Outdoor fan work at minimum speed due to this temperature.

b) Outdoor pipe temperature < 7 °C the cycle returns back to step algorithm

※ After the compressor stops the outdoor fan will run for 30 sec at high speed and then it will stop.

5) Low ambient cooling case : In this situation outdoor fan works in ON/OFF control.: If the pipe temperature is 0°C and it is falling rapidly in that case compressor will run for 5 min &

then it will go in low ambient control.

※※※※After the system is stopped by CT cut or heat sink cut-off then the cycle returns to the normal conditioned control.

8.4 Defrost Control 8. Control logic

1.Function

: These are about the control of compressor, fan of outdoor unit, reversing valve, EEV.

2. Starting to the defrosting operation

Defrost operation will be start when all the conditions below are matched simultaneously

A) Accumulation time of operation and the period after completion of defrost = 35min

(Outdoor air temperature –3°C)

B) Outdoor piping temperature is below than –6 (Option) °C for starting defrosting operation.


B) Outdoor piping temperature is below than –6 (Option) °C for starting defrosting operation.

3. Completion of defrost operation

Send signal of defrost completion in case of meeting one of the condition as below.

1) Defrosting time 7 minutes

2) Piping temperature maintain 10 seconds (Option ) in condition of more than 15°C (Option).

8.4 Defrost Control 8. Control logic

4. Defrosting Control Algorithm

1) Lowering the compressor frequency when starts the defrosting operation.

compressor is ON after 10 seconds from the arrival time of 30 Hz (Option) frequency

and is speed up its revolution till 100 Hz (Option)

2) Every EEV have 350 pulse (Option) of opening when starts defrosting operation.

3) Reversing valve is OFF after 5 seconds from arriving the compressor operating frequency of 30 Hz

and then fans of indoor units turn OFF.

4) After 5 seconds from the time arriving 30 Hz, fans of outdoor unit turn OFF and Hot Gas

bypass/Oil separator valve turn ON.


bypass/Oil separator valve turn ON.

5. Control algorithm of defrost completion

1)Frequency of compressor lowering to 30 Hz and maintain constant speed operation with 30 Hz for 75

seconds and then follow starting operation. If the constant speed compressor is OFF previously, it will

receive OFF signal after 5 seconds from the arrival time of 30 Hz.

2) The EEV will open with the standard previous pulse after 5 seconds from the time of 30 Hz.

3) Reversing valve is ON after 15 seconds from the time of 30 Hz of compressor frequency.

4) Fan of outdoor unit is ON with high speed and maintain it after 5 seconds from the time of 30Hz.

5) Hot Gas bypass valve/Oil separator bypass valve make OFF after 75 seconds from the time of 30Hz.

8.4 Defrost Control

Inverter Comp.

Outdoor EEV

Satisfy

Defrost Start

Condition

Satisfy

Defrost End

ConditionDefrost

Start

Heating

Start

(Defrost flag clear)

30 Hz

100 Hz(Option)

30 Hz

ON

Control

Control

350 Pulse(Option)

5s10s

60s(Option)

1 2 3 4 5 6 7 8ONorOFF

Starting 5step

1.0 *

5s 5s

1.1 * 1.2 *Setting opening

Before starting defrost

30s

9

Defrost signal of

10 11

Starting 6stepStarting 7step

Baseline

30s 30s 30s

2min 2min

8. Control logic


Outdoor Fan

Hot gas bypass

Indoor Fan

Reversing Valve

ON

OFF

ON/OFF

ON

OFF

ON

OFF OFF

ON

OFF

Hot

start

Maximum fan mode Set fan mode

(Option)

Defrost signal of

indoor unit on/

Starting maximum defrosting

time count

Indoor defrost signal OFF

Oil separator

Bypass valve OFF OFF

ON

8.5.1 Control of EEV opening

8.5 EEV Control8.5 EEV Control 8. Control logic

Heating

Cooling

Heating and cooling

EEV

opening

(Pulse)

0

460

Close

Power input

(Reset)Comp On Comp Off

160

240

Open

Comp On


1. EEV openings have a controllable ranges 40 to 500 pulse in both condition of cooling and heating.

2. Products do not be operated before initializing of EEV when starting.

3. Time constant control period of EEV is every 2 minutes except below conditions.

-.Control EEV every 1 minutes for 10 minutes after starting.

-.When indoor capacity changed, Control EEV every 1 minutes for 10 minutes after starting

-. Control EEV every 1 minutes for 10 minutes after starting in case of the special situation such as

defrost completion, oil recovery, oil equalizing control, oil supplying, current transformer limitation,

limitation of discharge temperature, low ambient operation control.

time

0

Initializing

90 sec

Starting

controlTime constant

control

30 sec

Off

Starting

control60 sec

-200

8.5 EEV Control 8. Control logic

Target stepTarget Pulse

Full open

Starting EEV

opening

Comp starting

8.5.2 Starting control (210 sec)

0. 7×××× Target Pulse(option)

0.8×××× Target Pulse

0.9×××× Target Pulse


Time(sec)30 150 180 240

Time (Option)

210

Comp starting

1. Only 1 LEV will operate as mentioned above and others are idle initially.

2. Starting control does not use the time when the system operate with partial load,

(example) after finishing starting control for 1 indoor unit, another indoor unit

(ON additionally) will directly operate from target opening pulse of LEV.

3. Urgent control by indoor piping temperature

a) LEV open 4 pulse with every 10 sec when the indoor piping temperature is below 3

b) When the temperature reaches 6, return to the starting control pulse value.

1) Superheating control (Cooling Mode)

- Superheating : T superheating = Tout – Tin = 2

- EEV pulse up : T superheating > 2

- EEV pulse down : T superheating < 2

2) Discharge T limit Control (Cooling mode)

- Discharge T limit : Td-T pipe

- EEV pulse down : T target < 25

- Superheating control : T target > 25

3) Target Temperature Control (Heating mode)



8.5.3 Steady state control

Tin

Tdisp

Discharge

Superheat

Sub cooling

(heating)

P-h diagram



- EEV pulse up : T superheating > 2

- EEV pulse down : T superheating < 2

4) Discharge T limit Control (Heating mode)

- Discharge T limit : Td-T pipe

- EEV pulse down : T target < 25

- Superheating control : T target > 25

5) IDU-distribution control

- Check the difference between the each room’ condensing

temp. and target temp.

- Up EEV pulse : T in < T target

- Down EEV pulse : T in > T target

Tsuc(Tout)

Superheating

(cooling)

Power ON

EEV

Initialization

(Duration 90 sec)

Fully close (set 0,-

200 pulse, can hear

knocking sound)

Power Reset

Fully Open

Check outdoor

temp.(To)

On-time control

(Duration continues)Step control (every 2

min response time)

Catch up the

stagnation


8.5.4 Flow Chart (Cooling)


Compressor ON

Outdoor Fan ON

Starting control

(Duration 210 sec)Step control

(every 1 min

response time)

Standard Initial set

pulse open

Super heat

control

(Tsh= Tout –Tin)

Open EEV

Check Tsh

Tsh ≥2

Close EEV

Tsh <2Check Td

Td <20

Td ≥20

Close EEV

* Td differ from the O.D temp. and capacity operating

Power ON

EEV

Initialization

(Duration 90 sec)

Fully close (set 0,-

200 pulse, can hear

knocking sound)

Power Reset

Fully Open

On-time control

(Duration continues)Step control (every 2

min response time)

Catch up the

stagnation

Check outdoor

temp.(To)

8.5.4 Flow Chart (Heating)



Compressor ON

Outdoor Fan ON

Starting control

(Duration 210 sec)Step control

(every 1 min

response time)

Standard Initial set

pulse open

Super heat

control

(Tsh= Ts –Tp)

Open EEV

Check Tsh

Tsh ≥2

Close EEV

Tsh <2Check Td

Td <20

Td ≥20

Close EEV

Pipe Length Expansion valvePosition Detector EEPROM

Input voltage

Error Display

Temperature

Sensing

Position Detect

IPM

8.6 PCB Details 8. Control logic


Input voltage

/ Phase sensing

Current sensing

Communication

Parts

Press S/W

Central Control

PC Monitoring

EMC

IPM

DC Link

(290V)

PSC Control

SMPS : 15Vdc* 2

8.6.1 General Information PSC Model

8. Control logic8.6 PCB Details

VWU

COMP

Inverter

Protective circuit

• Low/High voltage

• Peak current

IPM

Shunt resistor

3-Phase

Pulse

Width

Modulation

AC220V ~ 240V / 50Hz

Reactor

DC 400VConverterConverter

＋Noise

Filter

1Φ AC DC 3Φ DC

BLDC Motor

BEMF

Power Factor

Correction


• Peak current

8.6.1 General Information PSC Model

8. Control logic8.6 PCB Details8.6 PCB Details

Pipe

Length

DC Link

Volt.

Error

Indicator

Press

S/W

Volt./ Phase

Detector

Current

Detector

Power Factor

(PSC)


EMC

EEPROMIPM

Position

Detector

SMPS EEV PC

Monitoring

Communication

Parts

Thermal

Sensor

On-board

Rewrite

Central

Control

VWU

COMP

Inverter

AC220V ~ 240V / 50Hz

PR

PFC ModulePFC Module

Noise

Filter

1Φ AC 3Φ AC

BLDC Motor

27

26

25

21

23

OUT(WL)

OUT(VL)

OUT(UL)

C(SC)

C(FOD)

VFO

IN(WL)

IN(VL)

IN(UL)

COM(L)

VCC

S

R

ND

NS

＋DC

Protective circuit

• Low voltage

•Over voltage

3 - Phase Power Drive Bock

Shunt resistor

Vector

Control

8.6 PCB Details8.6 PCB Details 8. Control logic

8.6.2 General Information PFC Model


2323

NS •Over voltage

•Peak current

8.6 PCB Details8.6 PCB Details 8. Control logic

8.6.2 General Information PFC Model

Power Factor

(PFC)

Reversing

Coil

Current

DetectorPFC Coil ConnectorPress

S/W

Error

Indicator


SMPS

EMC

Thermal

Sensor

EEPROM

(PFC)

IPM

Position

Detector

EEV Communication

PartsBLDC Motor

9.1.1 Indoor side

Error Indicator

• The function is to self-diagnosis air conditioner and express the troubles identically if there is any trouble.

• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.

• If more than two troubles occur simultaneously, primarily the highest trouble of error code is expressed.

• After error occurrence, if error is released, error LED is also released simultaneously.

• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.

• Having or not of error code is different from Model.

9.1 Error Code 9. Troubleshooting


• Having or not of error code is different from Model.

2.4 Self-diagnosis Function (Outdoor)

Ex) Error 21(DC Peak)

2 Times

1 Sec.

1 Time

2 Sec.

LED01G

(RED)

LED02G

(GREEN)

2 Times

1 Sec.

1 Time

2 Sec.

2 Times

1 Sec.

1 Time

Note: For the details of error-code please refer PDB.

Case of errorContentsError

code

Open / ShortOutlet pipe sensor06

Different mode operationDifferent mode operation07

Communication Poorly

Float switch Open

Communication Poorly

Open / Short

Open / ShortAir sensor (open/short)01

Inlet pipe sensor02

Communication(Indoor↔Wired R/Control)03

Drain pump/ Float switch04

Communication(Indoor↔Outdoor)05

Off

Off

Off

Off

Off

Off

Off

Indoor

Status

9.1.1 Indoor side

9.1 Error Code 9. Troubleshooting


Different mode operationDifferent mode operation07 Off

Check sum mismatchingEEPROM check sum09 Off

Motor not operationBLDC motor fan lock10 Off

Ex) Error 21(DC Peak)

2 Times

1 Sec.

1 Time

2 Sec.

LED01G

(RED)

LED02G

(GREEN)

2 Times

1 Sec.

1 Time

2 Sec.

2 Times

1 Sec.

1 Time

Case of errorLED02GLED01G

ContentsError Outdoor

9.1.2 Outdoor side

9.1 Error Code9.1 Error Code 9. Troubleshooting


Case of errorLED02G

(Green)

LED01G

(Red)Contents

Error

code

Position Detection Error6times 2times DC Compressor Position26

7times 2times PSC Fault27

Off8times 2times DC Link High Volt28

Off

Off

Abnormal AC volt. Input.

Low / High press switch OPEN

DC Link volt. Is 140V↓

Current is 14A↑

Compressor malfunction,IPM Fault

3times 3times

2times 3times

5times 2times

4times 2times

3times 2times

2times 2times

1time 2times IPM Fault (Over current)21

CT 2(Max. Current)22

DC Link Low Volt.23

Low / High press24

AC Low / AC High Volt.25

Discharge Pipe Temp. High (INV)32

Discharge Pipe Temp. High (Cons)33

Off

Off

Off

Off

Off

Off

Off

Off

Off

Off

Outdoor

Status

Case of errorLED02G

(Green)LED01G(Red)

ContentsError

code

CT Circuit malfunction4times CT Circuit40 Off

Outdoor

Status

9.1.2 Outdoor side

9.1 Error Code9.1 Error Code 9. Troubleshooting


Open / Short7times 4times D-pipe sensor Cons. (open/ short)47

1time 5times Over capacity51

Communication Poorly3times 5times Communication (Indoor ↔ Outdoor)53

Condenser temp. high

Check sum mismatching

Open / Short

Open / Short

Open / Short

Open / Short

1time 6times

6times

6times 4times

5times 4times

4times 4times

1time 4times D-pipe sensor INV. (open/ short)41

Air sensor (open/ short)44

Condenser Pipe sensor (open/ short)45

Suction pipe sensor (open/ short)46

EEPROM check sum60

Condenser Pipe sensor temp. high61

Off

Off

Off

Off

Off

Off

Off

Off

Off

Heat sink temp. high2times 6times Heat sink sensor temp. high62

Open / Short5times 6times Heat sink sensor (open/ short)65

Off

Off

Over load combination

9.2 Trouble shooting9.2 Trouble shooting 9. Troubleshooting

TitleCheck

codeCheck point & Normal conditionCause of error

Indoor air sensor01

• Normal resistor : 10KΩ/ at 25 (Unplugged)

• Normal voltage : 2.5Vdc / at 25 (plugged)

• Connector connection error

• Faulty PCB

• Faulty sensor (Open / Short)

Indoor inlet

pipe sensor02


• Faulty PCB




Indoor • Connector connection error • Normal resistor : 5KΩ/ at 25 (Unplugged)

9.2.2 Check code Trouble shooting CH01, CH02, CH06


Indooroutlet

pipe sensor06


• Faulty PCB





Estimate the Voltageof each sensor.

Is the voltage of the sensor is 2.5Vdc at 25

Change

the sensorNo

Correct

connectionNo

Check theConnector connection

Unplug the sensor on Indoor unit PCB

Is it normal ? Yes

Repair or Change the PCB.

9.2.2 Check code Trouble shooting CH01, CH02, CH06

Check Flow Chart


Note: For the details of check-point errors please refer PDB.

connectionYes

Estimate the resistanceof each sensor.

Is it normal ?

Is the resistance of the sensoris 10 / 5 at 25?

Change

the sensorNo

Yes

Plug the sensor on Indoor unit PCB

Repair or Change the PCB.

Ω V

Unplugged plugged

Check the resistance Check the voltage

10 2.5Vdc


9.2.2 Sensor Table

Pipe Temp Air Temp

B Constant 3977 B Constant 3977

Std Temp 25 Std Temp 25

Resistance 500 Resistance 1000

Temp Resistance Volt Temp Resistance Volt

-30.0 102.17 4.714 -30.0 204.35 4.720

-25.0 73.49 4.611 -25.0 146.97 4.620

-20.0 53.55 4.481 -20.0 107.09 4.492


-15.0 39.50 4.322 -15.0 79.00 4.336

-10.0 29.48 4.131 -10.0 58.95 4.149

-5.0 22.24 3.910 -5.0 44.47 3.931

0.0 16.95 3.661 0.0 33.39 3.685

5.0 13.05 3.389 5.0 26.09 3.416

10.0 10.14 3.102 10.0 20.27 3.131

15.0 7.94 2.88 15.0 15.89 2.838

20.0 6.28 2.515 20.0 12.55 2.546

25.0 5.00 2.232 25.0 10.00 2.262

30.0 4.01 1.965 30.0 8.03 1.994

35.0 3.24 1.717 35.0 6.49 1.745


9.2.2 Sensor Table

Pipe Temp Air Temp

40.0 2.64 1.493 40.0 5.28 1.519

45.0 2.16 1.293 45.0 4.32 1.316

50.0 1.78 1.116 50.0 3.56 1.137

55.0 1.48 0.962 55.0 2.95 0.981

60.0 1.23 0.828 60.0 2.46 0.846

65.0 1.03 0.714 65.0 2.06 0.729

70.0 0.87 0.615 70.0 1.74 0.628


75.0 0.74 0.531 75.0 1.47 0.542

80.0 0.63 0.459 80.0 1.25 0.469

85.0 0.54 0.397 85.0 1.07 0.406

90.0 0.46 0.345 90.0 0.92 0.353

95.0 0.40 0.300 95.0 0.79 03.07

100.0 0.34 0.262 100.0 0.68 0.268


9.2.2 Sensor Table

Heatsink Temp D-Pipe Temp

B Constant 3970 B Constant 3500

Std Temp 25 Std Temp 25

Resistance 10.00 Resistance 200.00

Temp Resistance Volt Temp Resistance Volt

-30.0 102.17 4.71 -30.0 2845.99 4.969

-25.0 73.49 4.61 0.0 585.66 4.851

-20.0 53.55 4.48 5.0 465.17 4.814


-15.0 39.50 4.32 10.0 372.49 4.770

-10.0 29.48 4.13 15.0 300.58 4.717

-5.0 22.24 3.91 20.0 244.33 4.657

0.0 16.95 3.66 25.0 200.00 4.587

5.0 26.05 4.73 30.0 164.79 4.508

10.0 20.26 4.66 35.0 136.64 4.418

15.0 15.87 4.57 40.0 113.98 4.318

20.0 12.55 4.47 45.0 95.62 4.208

25.0 10.00 4.35 50.0 80.65 4.088

30.0 8.03 4.21 55.0 68.38 3.958

35.0 5.49 4.06 60.0 58.27 3.820


9.2.2 Sensor Table

Heatsink Temp D-Pipe Temp

40.0 5.28 3.89 65.0 49.88 3.674

45.0 4.33 3.71 70.0 42.90 3.522

50.0 3.57 3.52 75.0 37.05 3.365

55.0 2.96 3.32 80.0 32.14 3.205

60.0 2.47 3.11 85.0 27.99 3.043

65.0 2.07 2.90 90.0 24.46 2.880

70.0 1.74 2.69 95.0 21.46 2719


75.0 1.48 2.48 100.0 18.89 2.561

80.0 1.26 2.28 110.0 14.79 2.255

85.0 1.07 2.09 120.0 11.72 1.972

90.0 0.92 1.90 130.0 9.40 1.716

95.0 0.80 1.73 140.0 7.62 1.487

100.0 0.69 1.57 150.0 6.24 1.287

Publisher : CAC Engineering Team

Air Conditioning Company

LG Electronics Inc.

Cassette

LG Electronics Inc.

The date of issue : 2010.06

Copyright 2010 by LG Electronics, Inc. All rights reserved.

No part of this publication may be reproduced or distributed in

any form or by any means, without the prior written

permission of the publisher.


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