LG AS-H096UM0 Service Manual Download Page 1

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Room

Air Conditioner

SERVICE MANUAL

CAUTION

website http://www.lgservice.com

• BEFORE SERVICING THE UNIT, READ THE SAFETY

PRECAUTIONS IN THIS MANUAL.

• ONLY FOR AUTHORIZED SERVICE PERSONNEL.

MODELS: AS-H096U*M0
AS-H126U*M0
AS-H126U*M1
AS-H096U*M3
AS-H126U*M3

Summary of Contents for AS-H096UM0

Page 1: ...RVICE MANUAL LG CAUTION website http www lgservice com BEFORE SERVICING THE UNIT READ THE SAFETY PRECAUTIONS IN THIS MANUAL ONLY FOR AUTHORIZED SERVICE PERSONNEL MODELS AS H096U M0 AS H126U M0 AS H126U M1 AS H096U M3 AS H126U M3 ...

Page 2: ...nnecting the Cables to the Indoor Unit 22 Connecting the Cables to the Outdoor Unit 23 Checking the Drainage 24 Forming the Piping 24 Air Purging 25 Air Purging with Vacuum Pump 25 Test Running 27 Operation 28 Function of Controls 28 Display Function 35 Self diagnosis Function 35 Remote Control Operations 36 Disassembly 37 Indoor Unit 37 Schematic Diagram 40 Electric Control Device 40 Wiring Diagr...

Page 3: ...5V 60Hz 7 110V 50 60Hz F 200V 50 60Hz 8 380 415V 50Hz 9 380 415V 60Hz 7 Chassis 1 9 Name of Chassis of Unit Ex 3 S3 Chassis 8 Look A Z Look Color Artcool Model 9 Function A Z 10 Serial No 1 9 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 changeover A clean Low A G Nano Plasma F A changeover A clean 4way Low A H Tele LED 4way I Int...

Page 4: ...roperties only Be sure not to do Be sure to follow the instruction Do not use damaged power cords plugs or a loose socket There is risk of fire or electric shock Always use the power plug and socket with the ground terminal There is risk of electric shock Install the panel and the cover of control box securely There is risk of fire or electric shock Installation Do not modify or extend the power c...

Page 5: ...air conditioner run for a long time when the humidity is very high and a door or a window is left open Moisture may condense and wet or damage furnishings Always install a dedicated circuit and breaker Improper wiring or installation may cause fire or electric shock Use the correctly rated break er or fuse There is risk of fire or electric shock Operation Do not turn the air conditioner ON or OFF ...

Page 6: ...e a heater or other appliances near the power cable There is risk of fire failure of the product and or electric shock Do not allow water to run into electric part There is risk of fire failure of the product and or electric shock Do not store of use flammable gas or combustibles near the air conditioner There is risk of fire or failure of product Wax Thinner Always check for gas refriger ant leak...

Page 7: ...to the plastic parts of the product Do not touch the metal parts of the product when removing the air filter They are very sharp There is risk of personal injury Do not step on or put anything on the product outdoor unit There is risk of personal injury and failure of product Do not insert hands or other objects through the air inlet or outlet while the air conditioner is plugged in There are shar...

Page 8: ...W W mm 1030 H mm 290 D mm 153 Model Dimension INDOOR UNIT Indoor Unit This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that may cause harm to the air conditioner This symbol indicates special notes NOTICE Symbols used in this Manual ...

Page 9: ...ce Manual 9 Outdoor Unit Dimensions W L2 L3 L1 D H L4 L5 Gas side 3 way valve Liquid side 2 way valve MODEL AS H096U_Series DIM unit W mm 575 H mm 525 D mm 260 L1 mm 301 L2 mm 73 L3 mm 392 L4 mm 35 L5 mm 100 ...

Page 10: ...0 Room Air Conditioner Dimensions W L2 L1 D H L4 L5 Gas side 3 way valve Liquid side 2 way valve MODEL AS H126U_Series DIM unit W mm 770 H mm 540 D mm 245 L1 mm 287 L2 mm 64 L3 mm 518 L4 mm 10 L5 mm 100 ...

Page 11: ...ion Control Up Down Airflow Direction Control Left Right Remocon Type Service Valve Liquid inch mm Gas Sleeping Operation Drain Hose Connecting Cable p mm2 Power Cord p mm2 9 550 12 000 2 800 3 52 9 900 12 700 2 900 3 72 1 2 1 5 1 220 240 50 1 220 240 50 8 9 5 20 26 32 36 46 48 910 1 130 850 1 150 4 0 5 0 3 7 5 2 10 5 10 63 3 08 3 12 3 41 3 23 9 5 12 9 27 25 5 1030 x 290 x 153 1030 x 290 x 153 575...

Page 12: ... built over the unit to prevent direct sunlight or rain exposure make sure that heat radia tion from the condenser is not restricted 2 Ensure that the space around the back and sides is more than 10cm The front of the unit should have more than 70cm of space 3 Do not place animals and plants in the path of the warm air 4 Take the weight of the air conditioner into account and select a place where ...

Page 13: ... 7 5 15 30 30 Pipe Size Capacity Btu h GAS LIQUID Max Length A m Additional Refrigerant g m Max Elevation B m Standard Length m Outdoor unit Indoor unit A B Outdoor unit Indoor unit A B A Oil trap Outdoor unit Indoor unit B If piping length is more than 5m CAUTION Capacity is based on standard length and maximum allowance length is on the basis of reliability Oil trap should be installed every 5 7...

Page 14: ...g the hole through the wall for piping connections must be done safely Fixing Installation Plate Installation Plate Type A screw Installation plate Ø70mm Left rear piping Right rear piping C D B A Ø70mm Left rear piping Right rear piping B A D C Right rear piping B A D C Installation plate SU SZ S3 Installation plate Drill the piping hole with a ø70mm hole core drill Drill the piping hole at eithe...

Page 15: ... 2 Put the end of the copper tube pipe in a downward direction as you remove burrs in order to avoid drop ping burrs into the tubing Putting nut on Remove flare nuts attached to indoor and outdoor unit then put them on pipe tube having completed burr removal not possible to put them on after flaring work Flaring work 1 Firmly hold copper pipe in a die in the dimension shown in the table below 2 Ca...

Page 16: ...ing hole Do not connect the cable to the indoor unit Make a small loop with the cable for easy connec tion later 3 Tape the tubing drain hose and the connecting cable Be sure that the drain hose is located at the lowest side of the bundle Locating at the uper side can cause drain pan to overflow inside the unit CAUTION If the drain hose is routed inside the room insulate the hose with an insula ti...

Page 17: ...e insulation material around the connect ing portion 1 Overlap the connection pipe insulation material and the indoor unit pipe insulation material Bind them together with vinyl tape so that there may be no gap 2 Wrap the area which accommodates the rear piping housing section with vinyl tape 3 Bundle the piping and drain hose together by wrap ping them with vinyl tape for enough to cover where th...

Page 18: ...en the indoor unit and the installation plate and separate the bottom of the indoor unit from the wall Connecting the piping to the indoor unit and the drain hose to drain pipe 1 Align the center of the pipes and sufficiently tighten the flare nut by hand 2 Tighten the flare nut with a wrench 3 When extending the drain hose at the indoor unit install the drain pipe For left rear piping Drain pipe ...

Page 19: ...the rear piping housing section Reroute the pipings and the drain hose across the back of the chassis Indoor unit installation 1 Remove the spacer 2 Ensure that the hooks are properly seated on the installation plate by moving it left and right 3 Press the lower left and right sides of the unit against the installation plate until the hooks engage into their slots clicking sound Plastic bands Insu...

Page 20: ...UTION Installation Information For left piping Follow the instruction below Good case Press on the upper side of clamp and unfold the tubing to downward slowly Bad case Following bending type from right to left may cause damage to the tubing ...

Page 21: ...rque wrench until the wrench clicks When tightening the flare nut with torque wrench ensure the direction for tightening follows the arrow on the wrench mm inch kg m Ø6 35 1 4 1 8 Ø9 52 3 8 4 2 Ø12 7 1 2 5 5 Ø15 88 5 8 6 6 Ø19 05 3 4 6 6 Outside diameter Torque Outdoor unit Liquid side piping Smaller diameter Gas side piping Bigger diameter Torque wrench ...

Page 22: ...y may not be pulled out easily Connect the wires according to color codes referring to the wiring diagram CAUTION If a power plug is not used provide a circuit breaker between power source and the unit as shown by CAUTION The power cord connected to the A unit should be selected according to the following specifications Type B approved by HAR or SAA The power connecting cable connecting the indoor...

Page 23: ...tions 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 that the starting voltage is maintained at more than 90 percent of the rated voltage marked on the name plate 6 Confirm th...

Page 24: ...m the following Tape the piping drain hose and connecting cable from down to up Secure the tapped piping along the exterior wall using saddle or equivalent 3 In cases where the Outdoor 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 t...

Page 25: ...or unit Note that both the liquid and the gas side service valves on the outdoor unit are kept closed at this stage 2 Leak test Connect the manifold valve with pressure 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 cylin der valve when the gauge reading reached 150 P S I G Next test ...

Page 26: ...urely with an adjustable wrench This process is very 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 2 way and 3 way valves 2 Remove the service port cap from the 3 way valve 3 To open the 2 way va...

Page 27: ...eference the gas side pressure of optimum condition is as below Cooling If the actual pressure is higher than shown the system is most likely over charged and 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 NOTICE NOTICE Bolt Tubing connection Discharge temperature Disch...

Page 28: ...e in appliance 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 cancel...

Page 29: ... 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 mode operation i...

Page 30: ... 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 Compressor ON Temp Setting Temp 0 5 C Compres...

Page 31: ...d 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 according to the Fuzzy rule While in Fuzzy operation the...

Page 32: ...ion Jet Cool Mode Operation C O Model If the Jet Cool key is input at any operation 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 ...

Page 33: ... and Press the power button let it be pressed for about 3 seconds If you want to stop the operation re press the button Protection of the evaporator pipe from frosting If the indoor pipe temp is below 0 C in 7 min after the compressor operates without any pause while in cooling cycle operation mode the compressor and the outdoor fan are turned off in order to protect the indoor evapo rator pipe fr...

Page 34: ...unction 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 ...

Page 35: ...ndicator Timer Indicator Sleep Timer Indicator Defrost Indicator Operation Indicator Timer Indicator Sleep Timer Indicator Outdoor Unit Operation Self diagnosis Function 3sec 3sec 3sec once Error Code 1 Error Display LED Indoor body operation LED Error contents Indoor room temperature thermistor open short Indoor pipe temperature thermistor open short Indoor Thermistor assembly check SVC check poi...

Page 36: ...peed in cooling heating mode 6 CHAOS SWING BUTTON Used to stop or start louver movement and set the desired up down airflow direction 7 ON OFF TIMER BUTTONS Used to set the time of starting and stopping opera tion 8 TIME SETTING BUTTONS Used to adjust 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 BUTT...

Page 37: ... OFF To remove the Grille from the Chassis Hold up Inlet Grille Horizentally To remove the Grille pull the lower left and right side of the grille toward you slightly tilted and lift it straight upward To seperate connecter assembly and than to remove Inlet Grille assembly 1 Before removing the control box be sure to take out the wire screwed at the other end ...

Page 38: ...ll the control box out from the chassis careful ly 3 To remove the Discharge Grille Unhook the discharge grille and pull the dis charge grille out from the chassis carefully 4 To remove the Evaporator Remove 3 screws securing the evaporator at the left 2EA in the Eva Holder at the right 1EA ...

Page 39: ...Motor Cover Remove 2 securing screw Pull the motor cover out from the chassis carefully 6 To remove the Cross Flow Fan Loosen the screw securing the cross flow fan to the fan motor do not remove Lift up the right side of the cross flow fan and the fan motor separate the fan motor from the cross flow fan Remove the left end of the cross flow fan from the self aligning bearing Motor cover ...

Page 40: ...R03J 1 2W TRAICS SM1L43 100 1 2W R01J 120 1 2W R02J TR01J T1 1 4W R04J 560 ZNR02J TVR10561 TLP762JF IC01J 1 2 3 5 4 3 3 2 1 2 1 CN MOTOR FAN INDOOR MOTOR KID65004AF 1 UPD780023AGC C Vss0 5V Vdd0 8 NEC X2 Vss1 X1 INT0 INT1 BL 2 3 4 6 5 7 11 4WAY FAN 14 15 16 2 1 13 12 5 6 4 3 IC02M 10 9 7 8 12V OR YL RD PK 4 4 2 2 3 3 1 1 5 5 CN L R BL CSTS0800MG03 T2 R02A 20K 1M 5V R01B CRTL8 00MSOT OSC01B 3 1 Q01...

Page 41: ...R UNIT TERMINAL BLOCK CONNECTOR PWB ASM BR BL BK RD GN YL BR BL BK RD GN YL 1 L 2 N 3 4 3 4 BL BR CN U D WH CN DISP1 STEP MOTOR CN L R BL CN HVB STEP MOTOR OPTION OPTION LIMIT S W 1 LIMIT S W 2 H V B A CL RD RD BK BK SUC STEP MOTOR 2 COMP C S R FAN MOTOR OLP BR BR BL BK RD YL GN YL BR BL BK RD GN YL REVERSING VALVE YL BL BK RD CAPACITOR RD BR RD BL YL TO INDOOR UNIT OUTDOOR WIRING DIAGRAM 3854A300...

Page 42: ...42 Room Air Conditioner Schematic Diagram Components Location MAIN P W B ASSEMBLY AC PART TOP VIEW 800V PWB ASM 6871A10043 PWB 6870A90177A BOTTOM VIEW ...

Page 43: ...Service Manual 43 Schematic Diagram DISPLAY ASSEMBLY ...

Page 44: ...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 45: ...ise connected manifold gauge Open Open Open with charging cylinder Open Open Open with charging cylinder Open Open Open Open Works Shipping Air purging Installation Operation Pumping down Transfering Evacuation Servicing Gas charging Servicing Pressure check Servicing Gas releasing Servicing 1 2 3 4 5 6 Valve cap Open position Closed position Pin Service port Service port cap To outdoor unit Flare...

Page 46: ... the charge hose Open the low pressure valve on the charge set slightly to air purge from the charge hose 5 Set the 2 way valve to the closed position 6 Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg cm2 g 7 Immediately set the 3 way 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 s...

Page 47: ...rge 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 charged too su...

Page 48: ...ward 76 cmHg vacuum of 4 mmHg or less 3 Close the 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 L...

Page 49: ... a time approximately 150g each time 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 ope...

Page 50: ...ir 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 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 thermometer to the low pressure tubing ...

Page 51: ... Fuse Pattern damage Varistor ZNR01N Check the connection housing for contacting Connector related to CN POWER1 2 Connector related to CN MOTOR Connector contacting of Outdoor Fan Compressor Display PWB Assembly Check Check each load Indoor Outdoor Fan Motor Compressor Stepping Motor and contacting condition of related connector Main PCB Board Operation Check Items SMPS Transformer Indoor unit Inp...

Page 52: ...ed in LCD screen replace battery Check the contact of CN D1 2 connector 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 Display PWB Assembly Voltage between CN D2 DC 5V Check the connecting circuit between the remote contro...

Page 53: ...ngaged Compressor Outdoor Fan is stopped Check R02H 12 1k R04H 6 2k Micom Pin 26 27 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 Check Relay RY C...

Page 54: ...for dehumidifying mode Change operation for cooling mode Turn off Main power Check the connection of CN MOTOR1 2 Check the Fan Motor Check the Fuse AC250V 3 15A Turn ON Main Power Check PWM signal from Micom Pin 50 Check On Off signal from micom pin14 Check Voltage of CN Motor 1 2 pin is about 15V ...

Page 55: ...ring condition on PWB of CN UD LR1 LR2 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 Louvers Check the operating circuit of the Louvers Confirm that there is DC 12V between pin of CN UD and GND Confirm that there is a soldering short at following terminals Between of MICOM Between of IC02M...

Page 56: ...perature is disconnected or not about 10KΩ at 25 C Check the indoor pipe temperature is disconnected or not about 5KΩ at 25 C Turn ON Main Power Check the DC voltage on the PWB ASSEMBLY The details of check are as followings Check point Between Micom NO 63 and GND Between IC02M NO 14 and GND Comp ON DC 5V Below DC 1V Comp OFF DC 0V About DC 12V Check point Between Micom NO 51 and GND Between IC03M...

Page 57: ... Guide Turn off Main Power Check the electrical wiring diagram of outdoor side Check the abnormal condition for the component of Compressor Outdoor Fan Motor 4 way Check the open or short of connecting wires between indoor and outdoor ...

Page 58: ...ed View 352150 354210 147581 249951 266090 W3300 131410 146811 1 135311 268711 1 135080 2 268711 4 342800 267110 159830 359011 152313 146811 2 268711 4 135316 146811 2 145200 152302 135080 1 35211B 268711 2 567480 135516 346810 Indoor Unit 135313 ...

Page 59: ...Service Manual 59 554031 237205 435511 552202 567502 552116 552201 554160 561410 552111 550140 552203 1 552203 2 430411 447910 649950 437211 435301 559010 546810 Outdoor Unit Exploded View ...

Page 60: ... R 3531A21010D 3531A21010D 3531A20285F 3531A20285F R 3531A20285C 3531A21010C 3531A20285C 3531A20285C R 3531A21004J 3531A21004J 3531A20284J 3531A20284J R 3531A21004C 3531A21004C 3531A20284C 3531A20284C R 3531A21004P 3531A21004P 3531A20284G 3531A20284G R 3531A20284A 3531A21004A 3531A20284A 3531A20284A R 3531A21004G 3531A21004G 3531A20284L 3531A20284L R 3531A20284E 3531A21004E 3531A20284E 3531A20284E...

Page 61: ...681A20004S 4681A20004S 4681A20121B R 550140 ISOLATOR COMP 4H00982E 4H00982E 4H00982E 4H00982E R 552111 TUBE ASSEMBLY CAPILLARY 5211A20141Z 5211A20141Y 5211A20141Y 5211A20141Z R 552116 TUBE ASSEMBLY REVERSING 5211A21084B 5211A20140V 5211A20140V 5211A21084B R 552201 VALVE CHECK 5220AR7182A 5220AR7182A 5220AR7182A 5220AR7182A R 552202 VALVE REVERSING 5220AR3228D 5220AR3228D 5220AR3228D 5220AR3228D R ...

Page 62: ...62 Room Air Conditioner Memo ...

Page 63: ...P No 3828A20195T Printed in Korea ...

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