Table of Contents
Advertisement
Quick Links
LG Room
Air Conditioner
SERVICE MANUAL
MODELS: AS-C306M Series
AS-H306M Series
AS-C366N Series
AS-H366N Series
Service Manual S30AHP (AS-H306MLM0) A20347D.pdf
website http://www.lgservice.com
CAUTION
• BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
• ONLY FOR AUTHORIZED SERVICE PERSONNEL.
LG
Advertisement
Table of Contents
Troubleshooting
Related Manuals for LG AS-C306MSeries
Summary of Contents for LG AS-C306MSeries
- Page 1 LG Room Air Conditioner SERVICE MANUAL MODELS: AS-C306M Series AS-H306M Series AS-C366N Series AS-H366N Series CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL. Service Manual S30AHP (AS-H306MLM0) A20347D.pdf...
-
Page 2: Table Of Contents
Air Conditioner Service Manual TABLE OF CONTENTS LG Model Name ...............................3 Safety Precautions............................4 Dimensions ..............................9 Symbols Used in this Manual ........................9 Indoor Unit..............................9 Outdoor Unit.............................10 Product Specifications ..........................12 Installation ..............................13 Installation of Indoor, Outdoor unit ......................13 Flaring Work and Connection of Piping....................15 Connecting the cable between indoor unit and outdoor unit ..............22... -
Page 3: Lg Model Name
LG Model Name 2004 Code Type Code of Model Meaning Producing Center, L: Chang-won R22 N: India Refrigerant A: Chang-won R410A Z: Brazil C: Chang-won R407C D: Indonesia T: China M: Mexico K: Turkey R22 V: Vietnam E: Turkey R410A... -
Page 4: Safety Precautions
Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. I Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. This symbol indicates the possibility of death or serious injury. - Page 5 Safety Precautions For re-installation of the installed product, Do not install, remove, or re-install the unit by always contact a dealer or an authorized ser- yourself. vice center. • There is risk of fire, electric shock, explosion, or • There is risk of fire, electric shock, explosion, or injury.
- Page 6 Safety Precautions I Operation Do not turn the air-conditioner ON or OFF by Use a dedicated outlet for this appliance. plugging or unplugging the power plug. • There is risk of fire or electrical shock. • There is risk of fire or electrical shock. Grasp the plug to remove the cord from the Do not place a heater or other appliances near outlet.
- Page 7 Safety Precautions Unplug the unit if strange sounds, odors, or Be cautious that water could not enter the smoke comes from it. product. • There is risk of electric shock or fire. • There is risk of fire, electric shock, or product dam- age.
- Page 8 Safety Precautions I Operation Use a soft cloth to clean. Do not use harsh Do not touch the metal parts of the product detergents, solvents, etc. when removing the air filter. They are very sharp! • There is risk of fire, electric shock, or damage to the •...
-
Page 9: Dimensions
Dimensions Dimensions Symbols Used in this Manual 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 Indoor Unit Tubing hole cover Tubing hole cover Tubing hole cover Tubing hole cover... -
Page 10: Outdoor Unit
Dimensions Outdoor Unit • 30k Gas side 3-way valve Liquid side 3-way valve MODEL 30k SERIES 76.4 10 Room Air Conditioner... - Page 11 Dimensions • 36k Gas side 3-way valve Liquid side 3-way valve MODEL 36k SERIES 1038 1035 Service Manual 11...
-
Page 12: Product Specifications
Product Specifications Product Specifications Model Name AS-C306M SERIES AS-H306M SERIES AS-C366N SERIES AS-H366N SERIES Unit Item BTU/h(kcal/h) 28,000(7,051) 28,000(7,051) 34,000(8,568) 34,000(8,568) Cooling Capacity 8,211 8,211 9,964 9,964 BTU/h(kcal/h) 29,000(7,313) 35,500(8,945) Heating Capacity 8,504 10,404 Moisture Removal 3.85 3.85 Power Source Ø, V, Hz 1Ø, 220~240V, 50Hz 1Ø, 220~240V, 50Hz... -
Page 13: Installation
Installation Installation Installation of Indoor, Outdoor unit 1) Select the best location More than 60cm 1. Indoor unit I Do not have any heat or steam near the unit. I Select a place where there are no obstacles in More than 10cm More than 10cm front of the unit. - Page 14 Installation 3) How to fix installation plate 4) Drill a hole in the wall I Drill the piping hole with a ø70mm hole core drill. The wall you select should be strong and solid enough to prevent vibration Drill the piping hole at either the right or the left with the hole slightly slanted to the outdoor side.
-
Page 15: Flaring Work And Connection Of Piping
Installation Flaring Work and Connection of Piping 1) Flaring work 4. Flaring work I Carry out flaring work using flaring tool as shown Main cause for gas leakage is due to defect in flar- below. ing work. Carry out correct flaring work in the follow- ing procedure. - Page 16 Installation 2) Connection of piping-Indoor CAUTION When install, make sure that the 1. Remove the 2 screws of right side panel. remaining parts must be removed clearly so as not to damage the piping and drain Right side panel hose, especially power cord and connecting cable.
- Page 17 Installation 3. Tape the tubing, drain hose and the connecting 3. Tape the tubing, drain hose and the connecting 5. Connecting the pipings to the indoor unit and drain cable. Be sure that the drain hose is located at the cable.
- Page 18 Installation 6. Wrap the insulation material around the connecting For right rear piping portion. I Overlap the connection pipe insulation material and 1. Route the indoor tubing and the drain hose to the the indoor unit pipe insulation material. Bind them required piping hole position.
- Page 19 Installation I When extending the drain hose at the indoor unit, 5. Indoor unit installation install the drain pipe. I Hook the indoor unit onto the upper portion of the installation 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 Drain hose plate.) Ensure that the hooks are properly seated...
- Page 20 Installation I Bundle the piping and drain hose together by 9. Reinstall the parts to the original position. wrapping them with cloth tape over the range I Refix the lower panel to the original position. within which they fit into the rear piping housing section.
- Page 21 Installation 3) Connection of the drain hose 4) Connection of piping-Outdoor I The drain hose can be connected at two different positions. Use the most convenient position and, if 1. Align the center of the pipings and sufficiently tighten the flare nut by hand. necessary, exchange the position of the drain pan, rubber cap and the drain hose.
-
Page 22: Connecting The Cable Between Indoor Unit And Outdoor Unit
Installation Connecting the cable between indoor unit and outdoor unit 1) Connect the cable to the Indoor unit. I Connect the cable to the indoor unit by connect- CAUTION ing the wires to the terminals on the control The power cord connected to the outdoor unit board individually according to the outdoor unit should be complied with the following connection.(Ensure that the color of the wires of the... - Page 23 Installation Outdoor Unit 2) Connect the cable to the outdoor unit Terminal block 1. Remove the control cover from the unit by loosen- Over 5mm ing the screw. Connect the wires to the terminals on the control Connecting cable board individually. 2.
- Page 24 Installation 1) Checking the drainage 1. Remove the right side panel. 4. To check the drainage. I Pour a glass of water on the drain pan. I Ensure the water flows through the drain hose of Right side panel the indoor unit without any leakage and goes out the drain exit.
- Page 25 Installation 2) Form the piping 3. In cases where the Outdoor unit is installed above the Indoor unit perform the following. 1. Form the piping by wrapping the connecting por- I Tape the piping and connecting cable from down tion of the indoor unit with insulation material and to up.
-
Page 26: Air Purging
Installation AIR PURGING I Do a leak test of all joints of the tubing(both indoor 1) Air purging and outdoor) and both gas and liquid side service Air and moisture remaining in the refrigerant system valves. have undesirable effects as indicated below. Bubbles indicate a leak. - Page 27 Installation Soap water method Gas side (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- Liquid side 3-way valve clockwise approximately 90°, wait for about 2~3 sec, and...
-
Page 28: Test Running
TEST RUNNING 1. Check that all tubing and wiring have been prop- 3. Ensure the difference between the intake temper- erly connected. ature and the discharge is more than 8°C 2. Check that the gas and liquid side service valves (Cooling) or reversely (Heating). -
Page 29: Operation
Operation MAIN UNIT FUNCTION • DISPLAY 1) C/O Model (high quality LCD remote controller supplied) Operation Indicator • On while in appliance operation, off while 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. Comp. - Page 30 Operation I Healthy Dehumidification Mode • When the dehumidification operation input by the remote controller is received, the intake air temperature is detected and the setting temp is automatically set according to the intake air temperature. 26°C ≤ Intake Air Temp =>...
- Page 31 Operation 26°C ≤ Intake Air Temp => 25°C 24°C ≤ Intake Air Temp<26°C => Intake Air Temp+1°C 22°C ≤ Intake Air Temp<24°C => Intake Air Temp+0.5°C 18°C ≤ Intake Air Temp<22°C => Intake Air Temp Intake Air Temp<18°C => 18°C •...
- Page 32 Operation Compressor ON Temp => Setting Temp+0.5°C Compressor OFF Temp => Setting Temp+0.5°C • At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air temp at that time. 26°C ≤ Intake Air Temp =>...
- Page 33 Operation I Off-Timer <=> On-Timer Operation • When the set time is reached after the on/off time is input by the remote controller, the on/off-timer operation is carried out according to the set time. I Sleep Timer Operation • When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote controller while in appliance operation, the operation of the appliance stops.
- Page 34 Operation • Operation Mode that is kept on the memory - State of Operation ON/OFF - Operation Mode/Setting Temp/Selected Airflow Speed - Sleep Timer Mode/Remaining Time of Sleep Timer (unit of hour) I Forced Operation ( C/O Model) • To operate the appliance by force in case that the remote controller is lost, the forced operation button is on the main unit of the appliance to operate the appliance in the standard conditions.
- Page 35 Operation I Air Cleaner Operation • When an air cleaner function is selected during Air Conditioner operation - Plasma air cleaner function will be operated while in any operation mode with selecting the function. - The function is to be stopped while it is operating with selecting the function. •...
-
Page 36: Display Function
Operation Display Function Signal Receptor Receives the signals from the remote control.(Signal receiving sound: two short beeps or one long beep.) Operation Indication Lamps On/Off : Lights up during the system operation. Timer or Sleep Mode : Lights up during Timer operation or Sleep mode. Defrost Mode : Lights up during Defrost Mode or Hot Start operation. -
Page 37: Name And Function-Remote Control
Operation Name and Function-Remote Control The remote control transmits the signals to the system. 1. START/STOP BUTTON Remote Control Operation starts when this button is pressed and stops when the button is pressed again. Signal transmitter 2. OPERATION MODE SELECTION BUTTON Used to select the operation mode. -
Page 38: Disassembly
Disassembly Disassembly Indoor Unit Warning : Right side panel Disconnect the unit from power supply before making any checks. Be sure the power switch is set to “OFF”. 1. To remove the Grille from the Chassis. – Remove the 2 screws of right side panel. —... - Page 39 Disassembly š Remove the grille from the chassis. • Remove the 4 securing screws.(30K, 32K) • Remove the 5 securing screws.(36K, 38K) • To remove the Grille, pull the lower left and right side of the grille toward you (slightly tilted) and lift it straight upward.
- Page 40 Disassembly 3. To remove the Control Box. • Remove the 5 securing screws. Screw • Pull the control box out from the chassis carefully. 4. To remove the Discharge Grille. • Remove the 3 securing screw. • Pressing the right side of the discharge grille downward slightly, unhook the discharge grille.
- Page 41 Disassembly 6. To remove the Fan motor • Loosen the screw securing the cross-flow fan to the fan motor (do not remove). Fan motor Screw • Loosen the screw securing the mount motor. Screw Mount motor • Separate the fan motor from the cross-flow fan. •...
-
Page 42: Schematic Diagram
Schematic Diagram Schematic Diagram Schematic Diagram Heat Pump/Cooling Only Series(Indoor Unit) 42 Room Air Conditioner... - Page 43 Schematic Diagram Heat Pump Series (Outdoor Unit) I Model: AS-H306 Series Service Manual 43...
- Page 44 Schematic Diagram I Model: AS-H366 Series 44 Room Air Conditioner...
- Page 45 Schematic Diagram I Model: AS-C306 Series Service Manual 45...
- Page 46 Schematic Diagram I Model: AS-C366 Series 46 Room Air Conditioner...
- Page 47 Schematic Diagram Wiring Diagram • 30k Indoor Unit AS-C306 Series/AS-H306 Series CN-MOTOR TRIAC MOTOR SH-CAPA. THERMISTOR STEP MOTOR (UP/DOWN) H.V.B ASM CN-POWER STEP MOTOR (L/R) FUSE AC250V/T2A Negative ion LIMITS S/W STEP MOTOR (L/R) OPTION PILLAR 3(L) 4(N) 5 CN-DISP TERMINAL DISPLAY PCB ASM TO OUTDOOR UNIT...
- Page 48 Schematic Diagram • 36k Indoor Unit AS-C366 Series/ AS-H366 Series CN-MOTOR TRIAC MOTOR SH-CAPA. THERMISTOR STEP MOTOR (UP/DOWN) H.V.B ASM CN-POWER STEP MOTOR (L/R) FUSE AC250V/T2A Negative ion LIMITS S/W STEP MOTOR (L/R) OPTION PILLAR 3(L) 4(N) 5 CN-DISP TERMINAL DISPLAY PCB ASM TO OUTDOOR UNIT AUTO RESTART...
-
Page 49: Electronic Control Device
Schematic Diagram Electronic Control Device INDOOR UNIT P.W.B. ASSEMBLY Service Manual 49... - Page 50 Schematic Diagram OUTDOOR UNIT P.W.B. ASSEMBLY MODEL SOFT-STARTER AS-C306 Series AS-H306 Series AS-C366 Series AS-H366 Series 50 Room Air Conditioner...
- Page 51 Schematic Diagram DISPLAY P.W.B. ASM Service Manual 51...
-
Page 52: Troubleshooting Guide
Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram (1) Cooling Only Models INDOOR UNIT OUTDOOR UNIT LIQUID SIDE CAPILLARY TUBE HEAT HEAT EXCHANGE EXCHANGE (EVAPORATOR) (CONDENSER) GAS SIDE COMPRESSOR (2) Cooling & Heating Models INDOOR UNIT OUTDOOR UNIT CHECK VALVE LIQUID SIDE (Heating Model only) 3-WAY VALVE CAPILLARY TUBE... -
Page 53: Pipe Length And The Elevation
Troubleshooting Guide Pipe Length and the Elevation Pipe Size Standard Max. Max. Additional Capacity Length Elevation Length Refrigerant (Btu/h) LIQUID B (m) A (m) (g/m) 5/8" 3/8" (50Hz, 60Hz) 3/4" 3/8" (50Hz, 60Hz) Outdoor unit Outdoor unit Oil trap Indoor unit Indoor unit In case more than 5m CAUTION... -
Page 54: 3-Way Valve
Troubleshooting Guide 3-way Valve 1. Pump down Liquid side Indoor unit Outdoor unit Open 3-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air • Procedure (6) Operate the air conditioner in cooling mode (1) Confirm that both liquid side and gas side and stop it when the gauge indicates valves are set to the open position. - Page 55 Troubleshooting Guide 1) Re-air purging (Re-installation) Liquid side Indoor unit Closed Outdoor unit 3-Way valve Gas side Closed 3-Way valve Gas cylinder R407C OPEN CLOSE • Procedure (6) Disconnect the charge set and the gas cylin- (1) Confirm that both the liquid side valve and the der, and set the Liquid side and Gas side gas side valve are set to the closed position.
- Page 56 Troubleshooting Guide 2) Balance refrigerant of the 3-way valve (Gas leakage) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE • Procedure (1) Confirm that both the liquid side and gas side (3) Open the valve (Lo side) on the charge set and valves are set to the back seat.
- Page 57 Troubleshooting Guide 2. Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE • Procedure (1) Connect the vacuum pump to the center hose (3) Close the valve (Lo side) on the charge set, of charge set center hose turn off the vacuum pump, and confirm that the gauge needle does not move (approxima-...
-
Page 58: Gas Charging
Troubleshooting Guide 3. Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 3-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE • Procedure (1) Connect the charge hose to the charging This is different from previous procedures. cylinder. - Page 59 Troubleshooting Guide Additional gas charging (Gas leakage) • When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suc- tion pressure. • Use the graph or the equation below to get operating suction pressure according to indoor and outdoor tem- perature.
-
Page 60: Cycle Troubleshooting Guide
Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Check temperature difference between intake and discharge air and operating current. Temp. difference : approx. 0°C • All amount of refrigerant leaked Current : less than 80% of out. Check refrigeration cycle. rated current Temp. -
Page 61: Electronic Parts
Troubleshooting Guide Electronic Parts 1. Product does not operate at all. (* Refer to Electronic Control Device drawing and Schematic diagram.) Turn off Main Power (After 10 seconds) Turn on Main Power Does "beeping" sound is made from the Indoor Unit? Primarily, the operating condition of Micom is OK. - Page 62 Troubleshooting Guide 2. The product is not operate with the remote controller. Turn on Main Power While the compressor has been stopped, the compressor does not operate owing to the delaying function for 3 minutes after stopped. 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.
- Page 63 Troubleshooting Guide 3. Compressor/Outdoor Fan are unable to drive. Turn on Main Power Operate "Cooling Mode( )" by setting the desired temperature of the remote controller is less than one of the indoor temperature by 1°C at least. When in Air Circulation Mode, Compressor/Outdoor Fan is stopped. Check the sensor for indoor temperature is attached as close as to be effected by the tempera- ture of Heat Exchanger(EVA).
- Page 64 Troubleshooting Guide 4. When indoor Fan does not operate. Turn off Main power Check the connection of CN-MOTOR Check the Fan Motor Check the Fuse(AC250V/T2A) Check 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) •...
- Page 65 Troubleshooting Guide 5. When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal • Check the connecting condition of CN-U/D Connector •...
- Page 66 Troubleshooting Guide Check the connector of intake and pipe sensor(thermistors) • Check the related circuit of R02H(12.1K), R04H(6.2K), R03H(1.0K), Micom(No. 3, 4). • Check the indoor room temperature is disconnected or not (about 10KΩ/at 25°C). • Check the indoor pipe temperature is disconnected or not (about 5KΩ/at 25°C).
-
Page 67: Exploded View
Exploded View Exploded View 1. Indoor Unit Models: 30k SERIES 733010 342801 131410 352390-1 359011 131411 342800 159830 135311 131412 359012 346810 146811-2 352390-2 354210 135301 35211B 268714 266090 352150 146811-1 159901 263230 135313-1 131413 135313-2 W0CZZ 249951 267110 131414 135314 152313 135312... - Page 68 Exploded View Models: 36k SERIES 733010 342801 131410 352391 359011 131411 342800 159830 135311 131412 359012 352392 146811-2 346811 354210 135301 159901 35211B 249951 352150 135313-1 268714 266090 146811-3 135313-3 146811-1 263230 135313-2 W0CZZ 131414 267110 152302-1 131413 152302-1 135314 135315 152313 135312...
-
Page 69: Outdoor Unit
Exploded View 2. Outdoor Unit Models: 30k SERIES 435512 137213 137213 437210 554031 552111 435511 552102-1 552201-1 435301 W0CZZ-1 W0CZZ-2 552102-2 W0CZZ-2 546810 261704 263230 668711 559010 W6920 649950 552560 552202 447910 561410 566000 554160 552116 550140 552203-2 403410 552203-1 Service Manual 69... - Page 70 Replacement Parts List 2. Outdoor Unit Models: 36k SERIES 70 Room Air Conditioner...
-
Page 71: Replacement Parts List
Replacement Parts List Replacement Parts List Indoor Unit PART NO. LOCATION DESCRIPTION REMARKS AS-C306MLM0 AS-H306MLM0 AS-C366NLM0 AS-H366NLM0 131410 CHASSIS ASSEMBLY 3141A10001B 3141A10001B 3141A10001C 3141A10001C 131411 GUIDE ASSY 4975A20003A 4975A20003A 4975A20003A 4975A20003A 131412 CHASSIS 3140A20001A 3140A20001A 131414 GUIDE ASSY 4975A20001B 4975A20001B 4975A10001A 4975A20001A 135311... -
Page 72: Outdoor
Replacement Parts List Outdoor Unit PART NO. LOCATION DESCRIPTION REMARKS AS-C306MLM0 AS-H306MLM0 AS-C366NLM0 AS-H366NLM0 1317213 PANEL ASSEMBLY SIDE 1A00202F 1317213-1 PANEL ASSEMBLY SIDE 3721A10110A 3721A10110A 1317213-2 PANEL ASSEMBLY SIDE 3721A10110B 3721A10110B 261704 TRANSFORMER, POWER 6170A20004B 6170A20004B 6170A20004B 6170A20004B 263230 THERMISTOR ASSEMBLY 6323A0027A 430410 BASE ASSEMBLY, WELD[OUTDOOR]... - Page 73 Memo Service Manual 73...
- Page 74 Memo 74 Room Air Conditioner...
- Page 75 Printed in Korea P/No.: 3828A20347D...