Carrier 42HWG007, 42HQG012, 42HQG007, 42HQG009, 42HWG012 Technical Data & Service Manual

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INDOOR UNIT 42HWG007/009/012/018/024 42HQG007/009/012/018/024 HWG195C/225C/305C/455C/605C HWG195H/225H/305H/455H/605H

SPLIT SYSTEM AIR CONDITIONER

42HWG-Series, 42HQG-Series, HWG

...

H-Series, HWG

...

C-Series

O N/O

T EM

SLE

E P

TECHNICAL DATA & SERVICE MANUAL

Contents

11. SPECIFICATIONS........................................................................................................................2

12. OUTLINE AND DIMENSIONS .....................................................................................................6

13. OPERATION ................................................................................................................................7

14. WIRING DIAGRAM ....................................................................................................................29

15. REFRIGERANT CYCLE ............................................................................................................33

16. CONTROL BLOCK DIAGRAM...................................................................................................35

17. ELECTRIC CIRCUIT DIAGRAM ................................................................................................37

18. KEY COMPONENTS OF ELECTRONIC CIRCUIT ...................................................................50

19. CHECKING AND REPAIRING OF ELECTRIC PARTS..............................................................55

10. TROUBLE SHOOTING ..............................................................................................................59

11. DISASSEMBLY INSTRUCTIONS ......................................................................................61

12. EXPLODED DIAGRAM AND PARTS LIST ........................................................................63

13. EXTENDING RATINGS .....................................................................................................71

14. DIP SWITCH CONFIGURATION FOR ETO ......................................................................87

SPECIFICATIONS

Model

Function

Power Supply

Capacity

Btu/h Dehumidification L/h Electrical data A (ID unit only) W Electrical data A (System) W

max (*)

Type

Fan

RPM (Hi/Lo) Capacitor Motor Model Number

Connection

Type

OD (Liquid/Suction)

Cord

Power supplied to

connection

indoor unit

conductor

Power supplied to

size

outdoor unit

Dimension (WxHxD) mm Net Weight Kg

OD MODEL

42HWG007/HWG195C

Cooling

230V-1PH-50Hz

2050 7000

0.8

0.11 25

3.1

700

4.2

890

Indoor unit

Cross flow fan

1000/800

1.0µF, 450V

IC-8415G1KG7A

Flare

1/4”(6.35),3/8”(9.52)

R,C,Y: 2.5mm

R,C,Y: 1.0mm

780x240x170

38GL--07---703EC-40

SKY195C

42HWG009/HWG225C

Cooling

230V-1PH-50Hz

2410 8300

1.0

0.11 25

4.2

930

5.6

1200

Indoor unit

Cross flow fan

1100/900

1.0µF, 450V

IC-8415G1KG7A

Flare

1/4”(6.35),3/8”(9.52)

R,C,Y: 2.5mm

R,C,Y: 1.0mm

780x240x170

38GL--09---703EC-40

SKY225C

42HWG012/HWG305C

Cooling

230V-1PH-50Hz

3140

10700

1.4

0.16 36

5.3

1190

8.0

1700

Indoor unit

Cross flow fan

1050/850

1.0µF, 450V

IC-9420G2KG7A

Flare

1/4”(6.35),1/2”(12.7)

R,C,Y: 2.5mm

R,C,Y: 1.0mm

815x260x185

38GL--12---703EC-40

SKY305C

NOTE: •

Above the datum for running current and power input mean the value tested in the following conditions.

1) Ambient temperature : Tid=27/19ºC, Tod=35ºC in cooling.

2) (*)Severe operating conditions: Tid=32/23ºC, Tod=43ºC in cooling.

3) Voltage: 198/264V.

•

Specifications can change without notice.

NOTE: •

Above the datum for running current and power input mean the value tested in the following conditions.

1) Ambient temperature : Tid=27/19ºC, Tod=35ºC in cooling and Tid=20ºC, Tod=7/6ºC in heating. Voltage 230V.

2) (*)Severe operating conditions: Tid=32/23ºC, Tod=43ºC in cooling and Tid=27ºC, Tod=24/18ºC in heating. Voltage 198/264V.

•

Specifications can change without notice.

Model

Function

Power Supply

Capacity

Btu/h Dehumidification L/h Electrical data A (ID unit only) W Electrical data A (System) W

max (*)

W max (*)

Type

Fan

RPM (Hi/Lo) Capacitor Motor Model Number

Connection

Type OD (Liquid/Suction)

Power supplied to

Cord

indoor unit

connection conductor

Power supplied to

size

outdoor unit

Dimension (WxHxD) mm Net Weight Kg

OD UNIT MODEL

42HQG007/HWG195H-SERIES

Cooling Heating

220/240V-1PH-50Hz

2020 2150 6900 7340

0.8 -

0.11 25

3.24 3.06 730 690

4.5 4.6

920 890

Indoor unit

Cross flow fan

1000/800

1.0µF, 450V

IC-8415G1KG7A

Flare

1/4”(6.35),3/8”(9.52)

R,C,Y : 2.5mm

O.W2 : 1.0mm

S1,S2 : 0,75mm

R,C,Y,O,W2 : 1.0mm

S1, S2 : 0,75mm

780x240x170

38YL--07---703EJ-40

SKY195HJ

42HQG009/HWG225H-SERIES

Cooling Heating

220/240V-1PH-50Hz

2350 2740 8020 9350

1.0 -

0.11 25

4.22 4.17 950 940

5.7 5.8

1230 1230

Indoor unit

Cross flow fan

1100/900

1.0µF, 450V

IC-8415G1KG7A

Flare

1/4”(6.35),3/8”(9.52)

R,C,Y : 2.5mm

O.W2 : 1.0mm

S1,S2 : 0,75mm

R,C,Y,O,W2 : 1.0mm

S1, S2 : 0,75mm

780x240x170

38YL--09---703EJ-40

SKY225HJ

42HQG012/HWG305H-SERIES

Cooling Heating

220/240V-1PH-50Hz

3110 3250

10600 11000

1.4 -

0.16 36

5.4 4.44

1220 1020

8.1 7.0

1700 1300

Indoor unit

Cross flow fan

1050/850

1.0µF, 450V

IC-9420G2KG7A

Flare

1/4”(6.35),1/2”(12.7)

R,C,Y : 2.5mm

O.W2 : 1.0mm

S1,S2 : 0,75mm

R,C,Y,O,W2 : 1.0mm

S1, S2 : 0,75mm

815x260x185

38YL--12---703EJ-40

SKY305HJ

Model

Function

Power Supply

Capacity

W Btu/h

L/h Electrical data A (ID unit only) W Electrical data A (System) W

max (*)

Type

Fan

RPM (Hi/Lo) Capacitor Motor Model Number

Connection

Type OD (Liquid/Suction)

Cord connection conductor size

(Power supplied to outdoor unit)

Dimension (WxHxD) mm Net Weight Kg

OD UNIT

42HWG018 / HWG455C

Cooling

230V-1PH-50Hz

4690

16007

1.7

0.19 45

7.9

1780

2270

Cross flow fan

1150/950

1.8µF, 450V

IC-9430G4KG7A

Flare

1/4”(6.35) 1/2”(12.7)

R,C,Y: 1.0mm

1080x295x185

38GL--18---703EC-40

SKY455C

42HWG024 / HWG605C

Cooling

230V-1PH-50Hz

6240

21300

2.5

0.19 45

10.6

2420

3300

Cross flow fan

1250/1050

1.8µF, 450V

IC-9430G4KG7A

Flare

1/4”(6.35) 5/8”(15.88)

R,C,Y: 1.0mm

1080x295x185

38GL--24---703EC-40

SKY605C

NOTE: • Cooling capacity test is performed through temperature condition based

on 27ºC D.B., 19ºC W.B., in indoor and 35ºC D.B., 24ºC W.B. in outdoor.

• Cooling capacity test is performed at high voltage.

• Specification can change without notice.

Model

Function

Power Supply

Capacity

W Btu/h

L/h Electrical data A (ID unit only) W Electrical data A (System) W

max (*)

Type

Fan

RPM (Hi/Lo) Capacitor Motor Model Number

Connection

Type OD (Liquid/Suction)

Cord connection conductor size

(Power supplied to outdoor unit)

Dimension (WxHxD) mm Net Weight Kg

OD UNIT

42HQG018 HWG455H

Cooling Heating

230V-1PH-50Hz

4790 5100

16360 17420

1.7

0.19 0.19 45 45

7.3 6.7

1630 1490

x 8.0

2270 1800

Cross flow fan

1150 950

1.8µF, 450V

IC-9430G4KG7A

Flare

1/4”(6.35) 1/2”(12.7)

R,C,Y,O,W2 : 1.0mm

S1, S2 : 0.75mm

1080x295x185

38YL--18---703EC-40

SKY455HJ

42HQG024 HWG605H

Cooling Heating

230V-1PH-50Hz 6110 7170

20886 24486

2.5

0.19 0.19 45 45

10.7 11

2430 2480

17.0 14.6

3300 2900

Cross flow fan

1250 1050

1.8µF, 450V

IC-9430G4KG7A

Flare

1/4”(6.35) 5/8”(15.88)

R,C,Y,O,W2 : 1.0mm

S1, S2 : 0.75mm

1080x295x185

38YL--24---703EC-40

SKY605HJ

NOTE: • Cooling capacity test is performed through temperature condition based

on 27ºC D.B., 19ºC W.B., in indoor and 35ºC D.B., 24ºC W.B. in outdoor.

• Cooling capacity test is performed at high voltage.

• Specification can change without notice.

OUTLINE AND DIMENSIONS

INDOOR UNIT

MODEL

42HWG007/009 42HQG007/009 HWG195C/195H/225C/225H

42HWG012,42HQG012, HWG305C/305H

42HWG018/024, 42HQG018/024, HWG455C/455H/605C/605H

780

815

1080

240

260

295

170

185

MOUNTING PLATE

MAIN BODY

POWER PLUG

DRAIN HOSE

CONNECTION TUBE

OPERATION

1) SYSTEM DIAGRAM

Indoor Unit

O N

F F

T E

S L

E E

ROOM AIR INLET

AIR FILTER

ELECTROSTATIC/ACTIVE CARBON FILTER

REMOTE CONTROL SIGNAL RECEIVER

AIR SWING FLAP

VERTICAL LOUVER

ROOM AIR OUTLET

LCD REMOTE CONTROL

OUTDOOR AIR OUTLET

OUTDOOR AIR INLET

INDOOR AND OUTDOOR

CONNECTION

DRAIN HOSE

Outdoor Unit

2) INDOOR UNIT DISPLAY AND SWITCH PANEL

(Green) : Lights during the operation.

(Orange) : Lights during timer mode.

Indoor Unit Display

Switches Panel

EMERG.

TEST

EMERG. button :

Can be used when the remote control is missed or inoperative.

TEST button :

Is only used by service men to test the unit operation.

For the usage of EMERG. and TEST buttons, refer to page 24.

“(8) Emergency and Test Operation.”

3) NAMES AND FUNCTIONS OF REMOTE CONTROLLER

• 42HWG007/009/012/018/024 HWG195C/225C/305C/455C/605C

RST TA

I / O

TEMP



SLEEP

MODE FLAP

CLOCK EVERYDAYHOUR MINUTE

SETTIMER

ON OFF

CANCEL

10 10

2 1

SWING

LR03(AM4)1.5V

FAN



I/O BUTTON



TEMPERATURE SETTING BUTTONS



SLEEP TIMER BUTTON



OPERATION MODE SELECTING BUTTON



FAN SPEED SELECTING BUTTON



FLAP CONTROL BUTTON



ON/OFF TIMER AND CURRENT TIME BUTTONS



HOUR/MINUTE SETTING BUTTONS



SET AND CANCEL BUTTONS



EVERYDAY TIMER BUTTON



CURRENT TIME ADJUSTING BUTTON



RESET BUTTON



ADDRESS SWITCH

• 42HQG007/009/012/018/024 & HWG195H/225H/305H/455H/605H



I/O BUTTON



TEMPERATURE SETTING BUTTONS



SLEEP TIMER BUTTON



OPERATION MODE SELECTING BUTTON



FAN SPEED SELECTING BUTTON



FLAP CONTROL BUTTON



ON/OFF TIMER AND CURRENT TIME BUTTONS



HOUR/MINUTE SETTING BUTTONS



SET AND CANCEL BUTTONS



EVERYDAY TIMER BUTTON



CURRENT TIME ADJUSTING BUTTON



RESET BUTTON



ADDRESS SWITCH

RST TA

I / O

TEMP



SLEEP

MODE

CLOCK EVERYDAYHOUR MINUTE

SETTIMER

ON OFF

CANCEL

10 10

2 1

LR03(AM4)1.5V

SWING

FLAPFAN

 I/O BUTTON

Press this button to start operation. (A receiving beep is heard). Press this button again to stop operation. (A receiving beep is heard). When pressing the I/O button immediately after turning the unit off, the compressor will not operate for 3 minutes to keep it from overloading.

 TEMPERATURE SETTING BUTTON

Set the temperature to a desired room temperature, then unit will keep the tempera-ture to the set temperature.

• In cooling mode, when the room temperature is higher than the setting, the com-

pressor is automatically turned on to provide a cooling effect. When the room temperature is lower than the setting, the compressor is automatically turned off to stop cooling operation.

• In heating mode, when the room temperature is lower than the setting, the

compressor is automatically turned on to provide a heating effect. When the room temperature is higher than the setting, the compressor is automatically turned off to stop heating operation.

(42HQG007/009/012/018/024 & HWG195H/225H/305H/455H/605H) However the indoor fan will run to circulate the indoor air even during turning off the compressor.

 SLEEP TIMER BUTTON

Press this button to set the sleep timer.

 OPERATION MODE SELECTING BUTTON

Press this button to set the desired modes.

• DRY mode

In DRY mode, the microcomputer of the unit controls the indoor fan motor and makes

the outdoor unit automatically turn on and off according to the room tempera-

ture, and the room moisture will be removed more effectively.

• COOL mode

In COOL mode, the unit will run in normal cooling mode.

• FAN mode

In FAN mode, only the indoor fan will operate at the selected speed and circulate the room

air.

• HEAT mode (42HQG007/009/012/018/024 & HWG195H/225H/305H/455H/605H)

In HEAT mode, the unit will run in the normal heating mode.

• AUTO mode (42HQG007/009/012/018/024 & HWG195H/225H/305H/455H/605H)

In AUTO mode, the unit will operate automatically by selecting Cool or Heat mode and

Fan speed according to the room temperature.

 FAN SPEED SELECTING BUTTON

Press this button to select the desired fan speed. The indoor fan will operate at the selected fan speed. (AUTO, LOW, MED, HIGH) When you select “AUTO”, the fan speed is controlled by microcomputer of the unit.

 FLAP CONTROL BUTTON

Controls the discharge air flow direction up and down.

• In the beginning, the flaps open properly according to the operating mode.

• If you press this button, the flap will move stepwise and the position will be dis-

played.

• If you press this button again, the unit will operate at “SWING”. The flap will swing up

and down continuously at “SWING”.

 ON/OFF TIMER AND CURRENT TIME BUTTONS

• Set the desired time for the unit control with these buttons.

• If you set ON and OFF time, the unit will be automatically turned on and off at the set

time.

• Press current time button when you want to know the current time, and the current

time is indicated.

 SET AND CANCEL BUTTONS

Press SET button to reserve ON/OFF timer and if you want to cancel the reserved time, use CANCEL button.

 EVERYDAY TIMER BUTTON

Press this button at the reserved condition of the combined ON and OFF timer in order to repeat the combined ON and OFF timer reservation everyday until the reservation is canceled.

 CURRENT TIME ADJUSTING BUTTON

Press this button to adjust the current time.

 RESET BUTTON

Press this button when the remote control is not operating properly or after replacing batteries.

 ADDRESS SWITCH

If there are two indoor units in the same room, link one remote control with one indoor unit, and link the other remote control with the other indoor unit.

 HOUR/MINUTE SETTING BUTTONS

Adjust current time and ON/OFF timer with these buttons.

4) REMOTE CONTROLLER DISPLAY

• 42HWG007/009/012/018/024 & HWG195C/225C/305C/455C/605C

Indicates the selected operating mode.

Lights up when the signal from the remote control is transmitted. A receiving beep is heard from the unit.

Lights up when the batteries must be replaced with new ones. When this mark appears, replace the batteries within a week.

Lights up when the unit is operating.

Indicates the selected temperature.

Indicates flap modes

AUTO

SWING

Automatic position

User selected position

Swing up and down

Indicates the reserved status of SLEEP timer or EVERYDAY timer.

Indicates the reserved time of ON timer and OFF timer or the current time.

Indicates the selected fan speed.

OFF

FLAP

AUTO

SLEEP

EVERYDAY

SWING

 















COOL DRY FAN

AUTO LOW MED HIGH

OFF

FLAP

AUTO

SLEEP

EVERYDAY

SWING

• 42HQG007/009/012/018/024 & HWG195/225/305H/455H/605H

 















Indicates the selected operating mode.

Lights up when the signal from the remote control is transmitted. A receiving beep is heard from the unit.

Lights up when the batteries must be replaced with new ones. When this mark appears, replace the batteries within a week.

Lights up when the unit is operating.

COOL DRY FAN

HEAT

AUTOMATIC CHANGEOVER

Indicates the selected temperature.

Indicates flap modes

Automatic position

User selected position

Swing up and down

Indicates the reserved status of SLEEP timer or EVERYDAY timer.

Indicates the reserved time of ON timer and OFF timer or the current time.

Indicates the selected fan speed.

AUTO

SWING

AUTO LOW MED HIGH

5) DESCRIPTION OF FUNCTIONS (1) Timer Mode



General features – If user changes time of ON/OFF timer during timer function execution, the timer will be

changed according to the new set time.

– The other mode changes are enabled during timer function execution. – The maximum timer range is twenty-four hours according to the remote controller. – If user pushes the TEST or EMERG. button during timer function execution, timer function

will be canceled.

– If unit receives the timer function signal in Test or Emergency operation, these operations

will be canceled and timer function will be operated.



OFF-Timer

– If user sets time with OFF timer, the unit will stop at the set time. – The unit will be turned off automatically when the set time of OFF timer is reached.

UNIT ON

UNIT OFF

HOURT.S.

T.S.=USER SET TIME



ON-Timer – When the ON timer is set, unit monitors the room temperature before 1 hour from set time to

make the room as set condition at reserved set time.

– The actual on time of unit is decided at 0 to 40 minutes earlier than reserved on time accord-

ing to the room temperature and size.

UNIT OFF

HOUR

UNIT ON

T.S.

ACTUAL ON TIME(0~40MIN)



Combination of ON and OFF Timer – If user sets time with ON/OFF timer, the unit will start and stop at the set time.



SLEEP-Timer

– When the SLEEP timer is set, the unit will control the setting temperature to avoid

overcooling in Cool operation or overheating in Heat operation.

– When the SLEEP timer is set, the luminosity of unit lamps will be dimly not to interrupt the

sleeping.

– The SLEEP timer can be combined with ON timer. – Reserved time: 1hr, 2hr, 3hr, 7hr, 9hr – Indoor fan will operate at low speed.

UNIT ON

UNIT OFF

HOUR

UNIT ON

ON TIMEOFF TIME

NOTE :

• The current time is not indicated during the reservation of ON/OFF timer.

• If user wants to know the current time, press the CLOCK button and the

current time will be displayed for 5 seconds.

• If user reserves the ON timer during operation, the unit will operate

continuously.

• In ON/OFF timer operation, the earlier setting compared to the current time

will operate first.

TIME (MIN.)

FOR COOLING MODE

SET TIME

30 70 110 150

SET

TEMP.

°C

+0.5°C

TIME (MIN.)

FOR HEATING MODE

SET TIME

90 150

SET

TEMP.

°C

–1°C



EVERYDAY-Timer – The EVERYDAY timer can be set in case of reserved condition of the combined ON and

OFF timer or the combined ON and SLEEP timer.

– If user sets time with EVERYDAY timer, the unit will repeat the combined ON and OFF timer

reservation everyday.

(2) Fan Speed

• User can select the fan speed of AUTO, LOW, MED and HIGH by the remote controller.

• If user selects 'AUTO' fan speed, the speed is automatically controlled according to the

room temperature. (See following figure).

(R.T-T.S)° C

LOW

MED

HIGH

0123

FAN SPEED IN AUTO COOL MODE

(T.S- R.T)° C

LOW

MED

HIGH

0 1 2 3 4 5

* R.T= ROOM TEMPERATURE T. S= USER SET TEMPERATURE

FAN SPEED IN AUTO HEAT MODE

(3) Dry Mode

– This operation eliminates moisture effectively by operating the compressor, indoor and

outdoor fan motor intermittently, so that the room temperature is maintained at set temperature.

– Determination of dry mode BLOCK based on Room temp. and Set temp. (Set temp. : Ts)

1) Initial determination of dry mode BLOCK

CBA

Ts–2 Ts+1

2) Redetermination of dry mode BLOCK

Ts–2Ts–1 Ts+1 Ts+2

– Operating state according to the each BLOCK

1) BLOCK A

 COMP & ODF : “ON”  IDF : operate at LOW speed

2) BLOCK B

 COMP & ODF : repeat “ON” for 5 min. and “OFF” for 5 min.  IDF : operate at ULO speed

3) BLOCK C

 COMP & ODF : “OFF”  IDF : operate at ULO speed

NOTE :

1. Unit determines again the dry mode BLOCK by sensing Room temp. every 5 min.

2. 3 min. minimum operation of compressor is not applied.

(4) Automatic Operation

(42HQG007/009/012/018/024 & HWG195H/225H/305H/455H/605H)

– If the unit is set to ‘AUTO’ mode, the unit operates automatically by selecting COOL

or HEAT mode according to the room temperature to keep the room temperature comfortable.

ROOM TEMPERATURE

T.S+1° C

T.S

T.S-1° C

COOLING MODE

HOLD CURRENT MODE

HEATING MODE

– When the room temperature is lower than 21°C or is higher than 29°C, the unit

operates Heating or Cooling operation regardless of the user set temperature.

 This Automatic operation is not suitable for the application to the computer

room or some food/wine stock storage

21° C

COOL/HEAT TRANSITION

HEATING ONLY

COOLING ONLY

SENSED ROOM TEMP.

29° C

(5) Discharge Air Louver Control



Up and Down Control The air discharge direction can be controlled to swing up and down and can be fixed at

preferred position or automatic position by the remote control.

• If you select the Flap position using the FLAP button in the remote control, the flap in

the unit will move to that position automatically. Once you select the position, the unit remembers that position and whenever you turn on the unit, the flap will be positioned to that position.

• If you select SWING, the flap will swing up and down. In the COOL, DRY and FAN

mode, the flap will swing in the cool range. In the HEAT mode, the flap will swing in the heat range.

• If you select AUTO, the flap will position itself to the preset position according to the

operation mode.

NOTE

• Always use the remote control to adjust the flap position, otherwise it may cause

abnormal operation. Please turn off the unit and turn it on again when you manually adjust the flap out of range.

• The unit can have maximum capacity when the flap is located at position

.

Fixed

Swing Range

Auto Position

Cooling Only Model

AUTO

SWING

FLAP

Remote control

Fixed Swing Range Auto Position

Heat Pump Model

COOL

HEAT

COOL

HEAT

AUTO

SWING

FLAP

Remote control

MODEL A B

42HWG007/009/012 HWG195C/225C/305C 54° 36°

42HWG018/024 HWG455C/605C 66° 24°

MODEL A B

42HQG007/009/012, HWG195H/225H/305H 54° 36° 42HQG018/024, HWG455H/605H 66° 24°



Left and Right Control

If you want to adjust the direction of the discharge air to left or right, adjust the vertical louver with the handle after opening the flap.

HANDLE

NOTE

•

Please do not fix the flap at position  for a long time, as this position minimizes air circulation resulting in uneven room temperature.

• Please avoid the discharge air being directed towards the occupants for a long period

of time.

• Do not adjust the flap by the hand during SWING operation because it may damage

the air swing function.

(6) Unit Protection Devices



3 min. Time Delay and 3 min. minimum operation time of compressor – In normal operation, there is a time delay of three minutes (42HQG024/HWG605H : 5

minutes during heating mode) between compressor turning off and turning back on including initial power up.

– After compressor turns on, it will operate for 3 minutes independent of temperature condi-

tion.



Time Delay When changing the operation mode – The unit operates immediately when changing mode from ON to OFF or from OFF to ON,

or indoor fan speed without the change of operation mode.

– The unit operates after 10-second time delay when changing operating mode. – The unit operates after 3-second time delay when changing the set temp. without the

change of operation mode.



Frost Prevention of Indoor Unit. – When the unit operates at low ambient temperature, frost may appear on the evapo-

rator. When the indoor coil temperature is less than 0ºC for 10 minutes of continuous compressor operation from the start, microcomputer of the unit stops the compressor to protect the unit from the frost.

– The system performs this function only in COOL and DRY mode. – The control procedure for indoor coil freeze protection.

1) The compressor and outdoor fan turn off.

2) Indoor fan operates according to user set speed.

3) The normal operation returns when the indoor coil temperature is greater than or equal

to 7ºC.



Indoor Coil High Temperature Protection

– The system performs this function only in HEAT mode. – If the indoor coil temperature is greater than or equal to 57°C, the outdoor fan turns off and

does not turn on until the indoor coil temperature is less than or equal to 49°C.

– If the indoor coil temperature is greater than or equal to 62°C, the compressor turns off

until the indoor coil temperature is less than or equal to 42°C. The 3 min. time delay of compressor is applied in this case.

INDOOR COIL TEMP.

42° C 49° C 57° C 62° C

OFF

OUTDOOR FAN

COMPRESSOR

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Defrost – In HEAT mode, outdoor coil may be frosted, which cause decrease of the unit perfor-

mance. Therefore the microcomputer of the unit turns on or off the compressor to remove the frost.

– The defrost operation is performed as follows:

• Defrost initiation

1) On the basis of the demand condition considering the difference between indoor coil temperature and indoor room temperature, controller decides defrost initiation after satisfying two steps of preceding condition.

2) Preceding condition is a) The first step is “the accumulated compressor on time is greater than 30

minutes.”

b) Second step is the one of below two

-The first condition ; If Real-Delta>Defrost-Delta for 60 continuous seconds and

the following conditions are all true then defrost initiates. )The outdoor coil temperature<-2°C )The compressor has been on continuously for 15 minutes. OR

-The second condition ; If the outdoor coil temperature is less than -20°C and

the following conditions are all true then defrost initiates. )The outdoor fan has been on continuously for 60 seconds. )The compressor has been on continuously for 3 minutes.

•

Defrost mode

The normal system operations are stopped and the system operates as follows. a) The indoor fan, outdoor fan will be de-energized. b) The compressor and R.V.S. will be energized.

•

Defrost termination

The defrost cycle will terminate in one of the following cases. a) The outdoor coil temperature is greater than or equal to +25°C. b) 10 minutes after the start of defrost cycle.

•

Auto refresh

During normal heating operation, if the unit becomes OFF mode condition, then defrost mode will be performed at the OFF mode state of louver and display when the second step of preceding conditions is satisfied regardless of first step.

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Self-Diagnostic Function

The control will contain diagnostic test to verify the integrity of the system. Once a malfunction is detected, the diagnostic control section will force the system mode to OFF for 3 minutes. After the OFF delay, system mode is released and allowed to return to its normal state. The system will be allowed to restart on its own. The diagnostic control section will allow the system to fail 5 consecutive times before shutting down the system. The lamp is scanned every half second and the error codes are displayed by the flashing frequency of lamp. The error codes are displayed during SHUT-OFF (3 minutes off and after the 5th retry failure) as follows.

NOTE :

If more than two errors occur, the highest item are displayed. If the highest item is cleared, the next item codes are displayed.

NO ERROR DISPLAY ALLOWED

(RANK)

CONTENTS PATTERN MODES

1 MICOM MEMORY NOTHING SYSTEM RESET

2 ROOM AIR FAN ONLY

THERMISTOR MODE MALFUNCTION

3 INDOOR COIL FAN ONLY

THERMISTOR MODE MALFUNCTION

4 OUTDOOR COIL FAN ONLY

THERMISTOR MODE MALFUNCTION

5 INDOOR FAN

MOTOR MALFUNCTION

6 THERMISTOR ALL

WRONG WIRING MODE (ONLY IN TEST MODE)

3 sec

0.5 sec (2 times)

3 sec

0.5 sec (3 times)

0.5 sec (4 times)

3 sec

3 sec3 sec

0.5 sec (8 times)

3 sec

0.5 sec (continue)

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Auto restart Mode

– When the power failure is happened during the system operating, the micro will memo-

rize the operation mode and the unit operates automatically according to the previous operating mode after the power is recovered.

– Whenever the unit receives remote signal, the micom will memorize the following opera-

tion

• Power ON/OFF

• Operation mode

• Temperature setpoint

• Louver position

• Fan speed

 Cold draft function

– The system performs this function only in HEAT mode. – If the indoor coil temperature is lower than

a certain level, then indoor fan motor runs at slow speed regardless of user setting speed.

1) When the compressor stops, Indoor fan moter runs at monitoring speed only.

2) When the compressor runs, Indoor fan motor runs as follows.

(7) Address configuration

– According to input of selecting address configuration, this function configures custom

code of transmitted remote signal and processes it as input.

– Processable custom codes are displayed as follows.

Address configuration Processable custom code

A DCCA B DCCB

–

If user wants to use “B” address, adjust the slide switch to “B” in control PCB and remote.

ADDRESS

PCB

RST TA

LR03(AM4)1.5V

•

Remote control

• Remove the lid of battery case.

• Assign the address switch of one remote

control as B.

• Press the RST button with a sharp object.

•

Indoor unit

• Turn off the unit and pull out the power plug.

• Remove the front panel, terminal block cover and

frame grille.

• Pull out the PCB.

• Assign the address switch of one indoor unit as B.

Indoor Coil temperature(

ϒC

)

ϒC

-3

ϒC

30ϒC37ϒC43

ϒC

OFF

Monitoring Speed

Setted Speed

Low

(9) Emergency and T est Operation.

 Emergency operation

– When the remote control is lost, damaged or the battery is discharged, the

Emergency operation can be able to run the unit.

– lf user wants Emergency operation, push the EMERG. button on the T/B cover of

the indoor unit.

– The unit is operated automatically by selecting Cooling or Heating Mode according

to the room temperature.

– lf user wants to stop the Emergency operation, push the EMERG. button again or

operate remote control.

– The setting conditions of Emergency operation are as follows.

• Operation mode :

AUTO (42HQG007/009/012/018/024, HWG195H/225H/305H/455H/605H) COOL (42HWG007/009/012/018/024, HWG195C/225C/305C/455C/605C)

• Preset temperature: 25ºC (42HQG007/009/012/018/024, HWG195H/225H/305H/455H/605H) 24C (42HWG007/009/012/018/024, HWG195C/225C/305C/455C/605C)

(8) DST Interface

–

According to input of selecting address configuration of indoor unit PCB, the one of below functions is assigned.

– The applicable connector for these functions is CN18 of indoor unit PCB.

DST Interface

1) The DST(Dealer Service Tool) is an application program used to verify a defec-

tive control board in Air Conditioner

2) It can also be used to diagnose the fault before the board replacement.

3) To use DST function, first of all, following preparations are required.

– DST interface converter – G-DST interconnection wire – IBM PC 386DX-33 processor with MS Windows OS 3.1

( Minimum system requirement )

4) If there are any problems or questions relating to the operation or installation of

the DST please consult the ‘Installation Guide and User’s Manual’

Address configuration Functions

A DST Interface available

B DST Interface not available

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