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LG AS-C306MSeries, Service Manual

The LG AS-C306MSeries Service Manual is available for free download from our website. This comprehensive manual provides detailed instructions and troubleshooting information to ensure a smooth user experience with your LG AS-C306MSeries product. Unlock all the knowledge needed to make the most of your device easily and efficiently.

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12

Room Air Conditioner

Product Specifications

Product Specifications 

Cooling Capacity

BTU/h(kcal/h)

W

Heating Capacity

BTU/h(kcal/h)

W

Moisture Removal

l

/h

Power Source

Ø, V, Hz

Air Circulation

m

3

/min

Noise Level

dB(A)

±3

Input

W

Runnig Current

A

Starting Current

A

E.E.R.

BTU/h-W

C.O.P

W/W

Motor Output

W

Dimensions

mm

(W x H x D)

Net. Weight

kg

Refrigerant(R410A)

g

Airflow Direction Control (Up & Down)

Airflow Direction Control (Right & Left)

Negative lon

Air Purifying Filter

Deicer

Hot Start

Chaos Wind

Micom Dry

Timer

Self Diagnosis

Remocon type

Service valve

Sleeping Operation

Drain Hose

Connecting Cable

Power Cord

28,000(7,051)

28,000(7,051)

34,000(8,568)

34,000(8,568)

8,211

8,211

9,964

9,964

-

29,000(7,313)

-

35,500(8,945)

-

8,504

-

10,404

3.4

3.4

3.85

3.85

1Ø, 220~240V, 50Hz

1Ø, 220~240V, 50Hz

1Ø, 220~240V, 50Hz

1Ø, 220~240V, 50Hz

19.8

19.8

26

26

58

58

58

58

46

46

47

47

58

58

58

58

3,100

3,100 3,700 3,700

-

3,200

-

3,700

13.5

13.5

17

17

-

14.0

-

17

80

80

92

92

-

80

-

92

9.03

9.03 9.19

9.19

-

2.66

- 2.77

47

47

65

65

80

80

50

50

1,259 x 349 x 205

1,259 x 349 x 205

1,499 x 349 x 205

1,499 x 349 x 205

870 x 800 x 320

870 x 800 x 320

870 x 1038 x 320

870 x 1038 x 320

20

20

25

25

72

72

77

77

2350

2350

2750

2750

YES

YES

YES

YES

OPTION

OPTION

OPTION

OPTION

NO

NO

NO

NO

YES

YES

YES

YES

NO

YES

NO

YES

NO

YES

NO

YES

YES

YES

YES

YES

YES

YES

YES

YES

24hr, ON/OFF

24hr, ON/OFF

24hr, ON/OFF

24hr, ON/OFF

YES

YES

YES

YES

L.C.D Wireless

L.C.D Wireless

L.C.D Wireless

L.C.D Wireless

3/8"(9.52)

3/8"(9.52)

3/8"(9.52)

3/8"(9.52)

5/8"(15.88)

5/8"(15.88)

3/4"(19.05)

3/4"(19.05)

YES

YES

YES

YES

YES

YES

YES

YES

0.75mm

2

0.75mm

2

0.75mm

2

0.75mm

2

2.5mm

2

2.5mm

2

5.5mm

2

5.5mm

2

Model Name

Unit

Indoor

Outdoor
Indoor

Outdoor

Cooling

Heating
Cooling

Heating

Cooling

Heating
Cooling

Heating

Indoor

Outdoor

Indoor

Outdoor

Indoor

Outdoor

Liquid

Gas

Item

AS-C306M SERIES   AS-H306M SERIES    AS-C366N SERIES    AS-H366N SERIES

Summary of Contents for AS-C306MSeries

Page 1: ...ICE MANUAL LG MODELS AS C306M Series AS H306M Series AS C366N Series AS H366N Series CAUTION website http www lgservice com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL ...

Page 2: ...een indoor unit and outdoor unit 22 Air Purging 26 Test Running 28 Operation 29 Main unit Function 29 Display Function 36 Self diagnosis Function 36 Name and Function Remote Control 37 Disassembly 38 Indoor Unit 38 Schematic Diagram 42 Electric Control device 47 Wiring Diagram 49 Troubleshooting Guide 52 Refrigeration Cycle Diagram 52 Pipe Length and the Elevation 53 3 way Valve 54 Cycle Troublesh...

Page 3: ...240V 50Hz E 265V 60Hz 7 110V 50 60Hz F 200V 50 60Hz 8 380 415V 50Hz 9 380 415V 60Hz 7 Chassis A Z Name of Chassis of Unit Ex LSP SP Chassis 8 Look A Z Look Color Artcool Model 9 Function A Z 10 Serial No 1 9 LG Model De ARTCOOL COLOR velopment Serial No Basic A Basic 4Way B Plasma Filter C Plasma Filter 4 Way D Tele LCD E Tele LCD Nano plasma 4Way F Nano Plasma F A changeove A clean Low A G Nano P...

Page 4: ...is symbol indicates the possibility of death or serious injury This symbol indicates the possibility of injury or damage to properties only Be sure not to do Be sure to follow the instruction Do not use damaged power cords plugs or a loose socket Always use the power plug and socket with the ground terminal There is risk of fire of electric shock There is risk of electric shock Install the panel a...

Page 5: ...use injury Be especially care ful of the case edges and the fins on the condenser and evaporator There is risk of fire electric shock explosion or injury Be cautious when unpacking and installing the product For installation always contact the dealer or an Authorized service center For re installation of the installed product always contact a dealer or an authorized ser vice center Do not install ...

Page 6: ...sp the plug to remove the cord from the outlet Do not touch it with wet hands Do not place a heater or other appliances near the power cable There is risk of fire or electrical shock There is risk of fire and electric shock Do not allow water to run into electrical parts Do not store or use flammable gas or com bustibles near the air conditioner There is risk of fire failure of the product or elec...

Page 7: ...ct A bad connection may cause water leakage Keep level even when installing the product Use two or more people to lift and transport the air conditioner To avoid vibration or water leakage Avoid personal injury Installation 90 Unplug the unit if strange sounds odors or smoke comes from it Be cautious that water could not enter the product There is risk of electric shock or fire There is risk of fi...

Page 8: ...ric shock or damage to the plastic parts of the product There is risk of personal injury Do not step on or put anyting on the product outdoor units Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in There is risk of personal injury and failure of product There are sharp and moving parts that could cause personal injury Operation Wax Safety ...

Page 9: ...ng hole cover Tubing hole cover Installation plate D Indoor Unit This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the air conditioner This symbol indicates special notes NOTICE Symbols Used in this Manual W mm 1 259 1 499 H mm 349 349 D mm 205 205 Model Dimension SM CHASSIS SN CHASSIS Dimensions ...

Page 10: ...s MODEL DIM W L7 L6 L8 L9 D L1 L2 L3 L10 L11 L4 L5 H Gas side 3 way valve Liquid side 3 way valve W mm 870 H mm 800 D mm 320 L1 mm 370 L2 mm 340 L3 mm 25 L4 mm 775 L5 mm 25 L6 mm 546 L7 mm 162 L8 mm 162 L9 mm 54 L10 mm 79 L11 mm 76 4 30k SERIES 30k ...

Page 11: ... L9 L4 H L5 W D L1 L3 L2 L10 L11 Gas side 3 way valve Liquid side 3 way valve 36k SERIES MODEL DIM W mm 870 H mm 1038 D mm 320 L1 mm 360 L2 mm 340 L3 mm 25 L4 mm 1035 L5 mm 25 L6 mm 546 L7 mm 160 L8 mm 160 L9 mm 44 L10 mm 75 L11 mm 80 36k ...

Page 12: ... 8 26 26 58 58 58 58 46 46 47 47 58 58 58 58 3 100 3 100 3 700 3 700 3 200 3 700 13 5 13 5 17 17 14 0 17 80 80 92 92 80 92 9 03 9 03 9 19 9 19 2 66 2 77 47 47 65 65 80 80 50 50 1 259 x 349 x 205 1 259 x 349 x 205 1 499 x 349 x 205 1 499 x 349 x 205 870 x 800 x 320 870 x 800 x 320 870 x 1038 x 320 870 x 1038 x 320 20 20 25 25 72 72 77 77 2350 2350 2750 2750 YES YES YES YES OPTION OPTION OPTION OPTI...

Page 13: ...noise from the air conditioner do not disturb neighbors 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 If the outdoor unit is installed on root structures or walls this may result in excessive noise and vibration and ...

Page 14: ...o important to use caution concerning the location of the installation plate routing of the wiring to power outlets is through the walls typically Drilling the hole through the wall for piping con nections must be done safely 5 7mm 0 2 0 3 Indoor WALL Outdoor Installation Plate Type A screw Right rear piping Left rear piping ø70mm 195mm 115mm 115mm 180mm Right rear piping 30k 36k Left rear piping ...

Page 15: ...bing 3 Putting nut on Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having complet ed burr removal not possible to put them on after flaring work Copper pipe 90 Slanted Uneven Rough Bar Copper pipe Clamp handle Red arrow mark Cone Yoke Handle Bar A Pipe Reamer Point down 4 Flaring work Carry out flaring work using flaring tool as shown below Firmly hold copper pi...

Page 16: ...he wall and mat to drop 1 Route the indoor tubing and the drain hose in the direction of rear left 2 Insert the connecting cable into the indoor unit from the outdoor unit through the piping hole Do not connect the cable to the indoor unit Make a small loop with the cable for easy connection later Right side panel Drain hose Main PCB Lower panel Lower panel For left rear piping CAUTION When instal...

Page 17: ...tallation plate Engage the three hooks of the rear top and rear lower of the indoor unit with the upper edge and lower edge of the installation plate Ensure that the hooks are properly seated on the installation plate by moving it left and right 5 Connecting the pipings to the indoor unit and drain hose to drain pipe Align the center of the pipings and sufficiently tighten the flare nut by hand Ti...

Page 18: ...r piping housing sec tion 1 Route the indoor tubing and the drain hose to the required piping hole position 2 Insert the piping drain hose and the connecting cable into the piping hole 3 Insert the connecting cable into the indoor unit Don t connect the cable to the indoor unit Make a small loop with the cable for easy connection later 4 Tape the drain hose and the connecting cable Connecting cabl...

Page 19: ...n pipe 7 Wrap the insulation material around the connecting portion Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material Bind them together with vinyl tape so that there is no gap Wrap the area which accommodates the rear piping housing section with vinyl tape Installation plate Three upper hooks Installation plate Indoor unit Three lower hooks Setting line...

Page 20: ... Reroute the pipings and the drain hose across the back of the chassis 9 Reinstall the parts to the original position Refix the lower panel to the original position Connect display conductor Refix the front right side panel to the original position with the two screws Drain hose Vinyl tape narrow Pipe Wrap with vinyl tape wide Lower panel Main PCB Piping for passage through piping hole ...

Page 21: ...fastened so that there is no leakage 4 Connection of piping Outdoor 1 Align the center of the pipings and sufficiently tighten the flare nut 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 1 2 3 4 Outdoor unit Gas side piping Bigger diameter Liquid...

Page 22: ... L 2 N 1 L 5 G Y RED BLUE BROWN G Y The power cord connected to the outdoor unit should be complied with the following specifications Rubber insulation type H05RN F approved by HAR or SAA The connecting cable connected to the indoor and outdoor unit should be complied with the following specifications Rubber insulation type H07RN F approved by HAR or SAA CAUTION 8 5mm 20mm GN YL NORMAL CROSS SECTI...

Page 23: ...trol cover 2 The screw which fasten the wiring in the casing of electrical fittings are liable to come loose from vibrations to which the unit is subjected during the course of transportation Check them and make sure that they are all tightly fastened If they are loose it could cause burn out of the wires 3 Specification of power source 4 Confirm that electrical capacity is sufficient 5 See to tha...

Page 24: ...he drain pan Ensure the water flows through the drain hose of the indoor unit without any leakage and goes out the drain exit 5 Drain piping The drain hose should point downward for easy drain flow Do not make drain piping Right side panel Downward slope Do not raise Accumulated drain water Tip of drain hose dipped in water Air Waving Water leakage Water leakage Ditch Less than 50mm gap Water leak...

Page 25: ... unit is installed above the Indoor unit perform the following Tape the piping and connecting cable from down to up Secure the taped piping along the exterior wall Form a trap to prevent water entering the room Fix the piping onto the wall by saddle or equiva lent Taping Drain hose Pipings Connecting cable Trap is required to prevent water from entering into electrical parts Seal small openings ar...

Page 26: ... gauges and dry nitrogen gas cylinder to this service port with charge hoses Pressurize the system to no more than 150 P S I G with dry nitrogen gas and close the cylinder valve when the gauge reading reached 150 P S I G Next test for leaks with liquid soap Do a leak test of all joints of the tubing both indoor and outdoor and both gas and liquid side service valves Bubbles indicate a leak Be sure...

Page 27: ...y important to prevent leakage from the system Replace the valve caps at both gas and liquid side service valves and fasten them tight This completes air purging with a vacuum pump The air conditioner is now ready to test run 1 Remove the caps from the gas side and liquid side valves 2 Remove the service port cap from the gas side valve 3 To open the gas side valve turn the valve stem counter cloc...

Page 28: ...d charge should be removed If the actual pres sure are lower than shown the system is most likely undercharged and charge should be added The air conditioner is now ready for use Bolt Tubing connection Outside ambient TEMP The pressure of the gas side service valve 35 C 95 F 8 5 9 5kg cm2 G 120 138 P S I G This is performed when the unit is to be relocated or the refrigerant circuit is serviced Pu...

Page 29: ...pliance pause Timer Indicator On while in timer mode on off and in sleep timer mode off when timer mode is completed or canceled Defrost Indicator Off except when hot start during heating mode operation or while in defrost control Plasma Indicator On while in plasma mode off while plasma mode is canceled Auto restart Indicator On while auto restart mode off while auto restart mode is canceled Auto...

Page 30: ...ff the indoor fan is off when the indoor pipe temp is below 33 C when above 35 C it operates with the low airflow speed If overloaded while in heating mode operation in order to prevent the compressor from OLP operation the out door fan is turned on off according to the indoor pipe temp While in defrost control both of the indoor and outdoor fans are turned off Defrost Control While in heating mod...

Page 31: ...ification heating mode operations is carried out for 10 sec or longer before Fuzzy operation the mode before Fuzzy operation is operated 1 Fuzzy Operation for Cooling According to the setting temperature selected by Fuzzy rule when the intake air temp is 0 5 C or more below the setting temp the compressor is turned off When 0 5 C or more above the setting temp the compressor is turned on Compresso...

Page 32: ...ion the setting temperature is automatically selected according to the intake air temp at that time 20 C Intake Air Temp Intake Air Temp 0 5 C Intake Air Temp 20 C 20 C When the Fuzzy key Temperature Control key is input after the initial setting temperature is selected the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically acco...

Page 33: ...peration mode while in appliance operation the Jet Cool mode operates In the Jet Cool mode the indoor fan is operated at super high speed for 30 min at cooling mode operation In the Jet Cool mode operation the room temperature is controlled to the setting temperature 18 C When the sleep timer mode is input while in the Jet Cool mode operation the Jet Cool mode has the priority When the Jet Cool ke...

Page 34: ...fication Operation 23 C High Speed Intake Air Temp 21 C Heating Mode Operation 24 C High Speed Test Operation Control To check the condition of the installation when installing the appliance the appliance is operated at cooling mode high speed of airflow compressor on for 18 min without controlling the room temperature After supplying power to the main body keep pressing the forced operation butto...

Page 35: ...tion The function is to be stopped while it is operating with selecting the function When an air cleaner function is selected during operation off The function will be only operated When inlet grille of air conditioner is opened during plasma operation High Voltage Generator H V B is to be stopped When inlet grille of air conditioner is closed during plasma operation High Voltage Generator H V B w...

Page 36: ... during plasma purification operation option Auto Restart Mode Lights up during if Restart Button is pressed Auto Restart Button In failure of electric power if the button is pressed the unit runs as previous setting operation when power returns Forced Operation Button Operation starts when this button is pressed and stops when you press the button again 3sec 3sec 3sec once 3sec 3sec twice 3sec 5t...

Page 37: ...the time 9 TIMER SET CANCEL BUTTON Used to set the timer when the desired time is obtained and to cancel the Timer operation 10 SLEEP MODE AUTO BUTTON Used to set Sleep Mode Auto operation 11 AIR CIRCULATION BUTTON Used to circulate the room air without cooling or heating 12 ROOM TEMPERATURE CHECKING BUTTON Used to check the room temperature 13 PLASMA OPTIONAL Used to start or stop the plasma puri...

Page 38: ...sis Remove the 2 screws of right side panel Remove the right side panel by the arrow The connector can be disconnected by pulling it while pressing the connector s hook Remove the 1 screw for fixing low panel Remove the lower panel by the arrow Take care not to scratch the wall and mat to drop Remove the left side panel Remove the 2 screws Right side panel Main PCB Lower panel Left side panel Lowe...

Page 39: ...ide of the grille toward you slightly tilted and lift it straight upward Separate the black lead wire from the white connector in case of plasma model 2 To remove the sensor housing connector earth conductor and step motor conductor with sensor holder Motor Evaporator and P C B Power Conductor Step Motor Conductor Motor Conductor Sensor Conductor Earth Conductor BLACK WHITE 30k 36k 30k 36k ...

Page 40: ...the discharge grille downward slightly unhook the discharge grille Pull the discharge grille out from the chassis carefully 5 To remove the Evaporator Remove 3 screws securing the evaporator at the left 2EA at the right 1EA Remove 2 screw securing the evaporator clamp Unhook the tab on the right inside of the chassis at the same time slightly pull the evaporator toward you until the tab is clear o...

Page 41: ...an motor do not remove Loosen the screw securing the mount motor Separate the fan motor from the cross flow fan Take care not to drop the motor 7 To remove the Cross Flow Fan Loosen the screw securing the holder bearing Lift up the cross flow fan Screw Fan motor Screw Screw Fan motor Mount motor Holder bearing ...

Page 42: ...42 Room Air Conditioner Schematic Diagram Schematic Diagram Schematic Diagram Heat Pump Cooling Only Series Indoor Unit ...

Page 43: ...Service Manual 43 Schematic Diagram Heat Pump Series Outdoor Unit Model AS H306 Series 5 5 4 4 3 3 2 2 1 1 ...

Page 44: ...44 Room Air Conditioner Schematic Diagram Model AS H366 Series ...

Page 45: ...Service Manual 45 Schematic Diagram 5 5 4 4 3 3 2 2 1 1 Model AS C306 Series ...

Page 46: ...46 Room Air Conditioner Schematic Diagram Model AS C366 Series ...

Page 47: ... N CN COMP2 CN FAN BK OR OR BK REVERSING VALVE HIGH PRESSURE SWITCH FAN OUTDOOR PCB CAPACITOR YL CN 4WAY CN P1 L CN COMM RD BK BK TERMINAL BLOCK1 TO INDOOR UNIT POWER INPUT FUSE 5A FUSE 5A 1 0 2 6 4 8 POWER RELAY BR C 3854A20393A WIRING DIAGRAM CN TH BK THERMISTOR AS C306Series AS H306Series 3854A20065A AS C306 Series AS H306 Series MOTOR SH CAPA YL PILLAR TERMINAL AUTO RESTART FORCED OPERATION CN...

Page 48: ... OR TERMINAL BLOCK TERMINAL BLOCK1 3854A20393E CAPACITOR OUTDOOR PCB WIRING DIAGRAM CAPACITOR FAN2 FAN1 TO INDOOR UNIT POWER INPUT CN FAN CN COMP2 CN P2 N CN P1 N CN COMM BK BL 1 L 2 N 3 L 4 N 5 COMM RD BR BR BR BR BR 8 6 4 2 1 0 RD 2 1 FUSE 5A FUSE 5A RUNNING CAPACITOR POWER RELAY COMP R S C BL BL BL BK BK BK BR YL BL OR BK BR YL BL OR TERMINAL BLOCK TERMINAL BLOCK1 3854A20393D REVERSING VALVE CA...

Page 49: ...Service Manual 49 Schematic Diagram Electronic Control Device INDOOR UNIT P W B ASSEMBLY ...

Page 50: ...50 Room Air Conditioner Schematic Diagram OUTDOOR UNIT P W B ASSEMBLY MODEL SOFT STARTER AS C306 Series X AS H306 Series X AS C366 Series X AS H366 Series X ...

Page 51: ...Service Manual 51 Schematic Diagram DISPLAY P W B ASM ...

Page 52: ...HANGE EVAPORATOR HEAT EXCHANGE CONDENSER HEAT EXCHANGE CONDENSER COMPRESSOR COMPRESSOR ACCUMU LATOR GAS SIDE GAS SIDE 3 WAY VALVE LIQUID SIDE LIQUID SIDE 3 WAY VALVE CAPILLARY TUBE CAPILLARY TUBE CHECK VALVE Heating Model only COOLING HEATING REVERSING VALVE Heating Model Only 1 Cooling Only Models Refrigeration Cycle Diagram 2 Cooling Heating Models ...

Page 53: ...basis of reliability Oil trap should be installed per 5 7 meters CAUTION Outdoor unit Indoor unit A B A Oil trap Outdoor unit Indoor unit B In case more than 5m 30k 5 8 3 8 7 5 15 30 30 50Hz 60Hz 36k 3 4 3 8 7 5 20 30 50 50Hz 60Hz Pipe Size Capacity Btu h GAS LIQUID Additional Refrigerant g m Max Length A m Max Elevation B m Standard Length m ...

Page 54: ...he closed posi tion 6 Operate the air conditioner in cooling mode and stop it when the gauge indicates 1kg cm2 g 7 Immediately set the Gas side valve to the closed position Do this quickly so that the gauge ends up indi cating 3 to 5kg cm2 g 8 Disconnect the charge set and mount the Liquid side and Gas side valve s stem nuts and the service port nut Use torque wrench to tighten the service port nu...

Page 55: ...to tighten the flare nut on liquid side valve 4 Check for gas leakage Check the flare connections for gas leakage 5 Discharge the refrigerant Close the valve on the gas cylinder and dis charge the refrigerant until the gauge indicates 3 to 5 kg cm2 g 6 Disconnect the charge set and the gas cylin der and set the Liquid side and Gas side valves to the open position Be sure to use a hexagonal wrench ...

Page 56: ... the charge set and discharge the refrigerant until the gauge indi cates 0 kg cm2 G If there is no air in the refrigerant cycle the pressure when the air conditioner is not running is higher than 1 kg cm2 G discharge the refrig erant until the gauge indicates 0 5 to 1 kg cm2 G if this is the case it will not be neces sary to apply a evacuatin Discharge the refrigerant gradually if it is dis charge...

Page 57: ...valve Lo side on the charge set turn off the vacuum pump and confirm that the gauge needle does not move approxima tely 5 minutes after turning off the vacuum pump 4 Disconnect the charge hose from the vacuum pump Vacuum pump oil If the vacuum pump oil becomes dirty or depleted replenish as needed Lo Open Open Vacuum pump 3 Way valve Outdoor unit Liquid side Indoor unit Gas side 3 Way valve CLOSE ...

Page 58: ...ime while operating the air conditioner in the cooling cycle however one time is not suffi cient wait approximately 1 minute and then repeat the procedure pumping down pin 4 Immediately disconnect the charge hose from the 3 way valve s service port Stopping partway will allow the gas to be dis charged If the system has been charged with liquid refrigerant while operating the air conditioner turn o...

Page 59: ... of using graph Find outdoor temperature Find indoor temperature onto the curve of outdoor temperature Read suction pressure at the axis of ordinates The method of using equation Calculate suction pressure after putting indoor and outdoor temperature into the equation 13 At operating the Unit for 10 minutes Suction Pressure Kg cm 2 g Outdoor Temp C Indoor Temp C 12 11 10 9 8 7 6 5 5 10 15 20 25 30...

Page 60: ...harge air depends on room air humidity When the room air humidity is relativery higher temperature difference is smaller When the room air humidity is relatively lower tem perature difference is larger 2 Check temperature and pressure of refrigeration cycle Notice 1 The suction pressure is usually 4 5 6 0 kg cm2 G Cooling at normal condition 2 The temperature can be measured by attaching the therm...

Page 61: ...lated to CN MOTOR Connector contacting of Outdoor Fan Compressor Display PWB Ass y Check Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor and contacting condition of related connector PCB Board Operation Check Items Power Transformer Outdoor unit Input Voltage Output Voltage IC01D 7812 Output Outdoor unit IC02D 7805 Output Outdoor unit IC04D 7805 Output Indoor unit IC01A KIA7036 ...

Page 62: ...ctor When the compressor stopped Indoor Fan is driven by a low speed At this point the wind speed is not controlled by the remote controller When operated in the Sleeping Mode the wind speed is set to the low speed by force Check DISP PWB Ass y Voltage between CN DISP DC 5V When the detect switch double key inside the remote controller door is fault it is impossible to operate temperature regulati...

Page 63: ...K R04H 6 2K Micom No 3 4 Indoor unit Check the related circuit of R04H 6 2K Micom No 3 Output unit Check the indoor temperature sensor is disconnected or not About 10kΩ at 25 C Turn off Main Power Check the electrical wiring diagram of outdoor side Check the abnormal condition for the component of Compressor Outdoor Fan Motor Check the open or short of conmecting wires between indoor and outdoor C...

Page 64: ...heck the related circuit of indoor Fan Motor The pin NO 63 of Micom and the part for driving TRIAC the input and output signal of IC01M PIN NO 2 15 Check the pattern Check the TRIAC TRIAC Open Indoor Fan Motor never operate TRIAC short Indoor Fan Motor always operates in case of ON or OFF 4 When indoor Fan does not operate The voltage of PIN NO 1 blue and 3 yellow of CN MOTOR About AC 180V over Ab...

Page 65: ...e is detected when rotating the Vertical Louver with hands Normal Check the connecting condition of CN U D Connector Check the soldering condition on PWB of STEP U D Connector If there are no problems after above checks Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver 5 When Vertical Louver does not operate Check the operating ci...

Page 66: ...and CN POWER 2 N COMP ON DC5V About DC12V AC 220 240V COMP OFF DC0V DC0V Below AC10V CHECK POINT Between Micom No 13 and GND Between RY 4WAY No 1 and No 4 Between CN 4WAY and CN POWER 2 N COMP ON DC5V About DC12V AC 220 240V COMP OFF DC0V DC0V Below AC10V CHECK POINT Between Micom No 14 and GND Between RY FAN No 1 and No 4 Between CN FAN and CN POWER 2 N COMP ON DC5V About DC12V AC 220 240V COMP O...

Page 67: ...7110 131414 131413 W0CZZ 146811 1 146811 2 152302 359011 135311 342801 135301 266090 268714 263230 249951 359012 342800 352390 2 346810 733010 135313 1 135313 2 135314 135312 159830 352390 1 131411 131412 131410 159901 352150 35211B 354210 1 Indoor Unit Models 30k SERIES ...

Page 68: ...3 135314 267110 354210 W0CZZ 152302 1 152302 2 135311 35211B 342801 135301 159901 266090 268714 263230 131414 131413 352150 146811 1 146811 2 146811 3 249951 359012 359011 342800 131411 131412 352392 346811 733010 135313 1 135313 2 135313 3 135312 159830 352391 131410 152302 1 ...

Page 69: ...560 552202 561410 552116 566000 554160 649950 552203 2 552203 1 435512 554031 137213 137213 559010 435301 403410 546810 437210 435511 552111 552102 1 552102 2 552201 1 263230 668711 261704 W0CZZ 2 W0CZZ 1 W0CZZ 2 W6920 2 Outdoor Unit Models 30k SERIES ...

Page 70: ... 559010 447910 430410 435512 435301 437210 552112 552113 137213 2 137213 1 435300 435511 554031 552201 2 552102 2 552102 3 550140 552560 552202 561410 552116 566000 554160 649950 552203 2 552203 1 263230 668711 261704 W0CZZ 2 W0CZZ 1 W0CZZ 2 W6920 2 Outdoor Unit Models 36k SERIES ...

Page 71: ... 5990A20002A R 249951 CONTROL BOX ASSEMBLY INDOOR 4995A10115B 4995A20337S 4995A10115A 4995A20337U R 263230 THERMISTOR ASSEMBLY 6323A20002C 6323A20002C 6323A20002C 6323A20002C R 266090 H V ASSY 6609A10003C 6609A10003C 6609A10003C 6609A10003C R 267110 REMOTE CONTROLLER ASSEMBLY 6711A20077M 6711A20077N 6711A20077M 6711A20077N R 268712 PWB PCB ASSY DISPLAY 6871A20108B 6871A20108B 6871A20108B 6871A2010...

Page 72: ...3G R 552201 1 VALVE CHECK 5220A30004A 5220A30004A R 552201 2 VALVE CHECK 3H01552F R 552111 TUBE ASSEMBLY CAPILLARY 5211A20034W 5211A26001A R 552116 TUBE ASSEMBLY REVERSING 5211A21200B 5211A20570R R 552202 VALVE REVERSING 5220AR3228E 5220AR3228E R 552203 2 VALVE SERVICE 5220A20013A 5220A20013A 2A00499L 2A00499L R 552203 1 VALVE SERVICE 5220A20001R 5220A20001R 5220A20001F 5220A20001F R 552560 MUFFLE...

Page 73: ...Service Manual 73 Memo ...

Page 74: ...74 Room Air Conditioner Memo ...

Page 75: ...P No 3828A20347D Printed in Korea ...

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