Service Manual
Page 1
website http://www.lgservice.com LG Multi Type Air Conditioner SERVICE MANUAL MODEL • Indoor Unit: Room Type AMNH093D4A0(LMN090HE) AMNH123DEA0 (LMN120HE) AMNC093D4A0(LMN090CE) AMNC123DEA0 (LMN120CE) Art Cool Type AMNH093APM0(LMAN090HNS) AMNH123APM0(LMAN120HNS) AMNC093APM0(LMAN090CNS) AMNC123APM0(LMAN120CNS) • Outdoor Unit: A2UH243FA0(LMU240HE) A2UC243FA0 (LMU240CE) LG CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
website http://www.lgservice.com LG Multi Type Air Conditioner SERVICE MANUAL MODEL • Indoor Unit: Room Type AMNH093D4A0(LMN090HE) AMNH123DEA0 (LMN120HE) AMNC093D4A0(LMN090CE) AMNC123DEA0 (LMN120CE) Art Cool Type AMNH093APM0(LMAN090HNS) AMNH123APM0(LMAN120HNS) AMNC093APM0(LMAN090CNS) AMNC123APM0(LMAN120CNS) • Outdoor Unit: A2UH243FA0(LMU240HE) A2UC243FA0 (LMU240CE) LG CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.
Service Manual
Page 14
Number of Each Room m For One Room m Max. Interunit Piping Length Total of Connectable Indoor Units...Max. of Zero. Due to our policy of Zero. 2. Used / Diameter EA/inch(mm) Discharge Side / Top Air Circulation Outdoor CMM(CFM) Noise Level(H/L) at 230V Sound Press,1m dB(A) 1 Defrosting SVC Valve Liquid inch(mm) Gas...Interconnecting Piping Length 7.5m -Level Difference of innovation some specifications may be changed without notification. 14 Multi type Air Conditioner A2UH243FA0(LMU240HE) 9,000~24,000 2637~7033 2267~6037 9,000~24,000 2637~7033 2267~6037 1170~2390...
Number of Each Room m For One Room m Max. Interunit Piping Length Total of Connectable Indoor Units...Max. of Zero. Due to our policy of Zero. 2. Used / Diameter EA/inch(mm) Discharge Side / Top Air Circulation Outdoor CMM(CFM) Noise Level(H/L) at 230V Sound Press,1m dB(A) 1 Defrosting SVC Valve Liquid inch(mm) Gas...Interconnecting Piping Length 7.5m -Level Difference of innovation some specifications may be changed without notification. 14 Multi type Air Conditioner A2UH243FA0(LMU240HE) 9,000~24,000 2637~7033 2267~6037 9,000~24,000 2637~7033 2267~6037 1170~2390...
Service Manual
Page 22
...• Make a small loop with the cable for installation through the piping hole. • Do not connect the cable to overflow inside the room, insulate the hose with the figure by ) and pull the tubing and drain hose away from the outdoor unit through the wall. 2. Route ... cable. Prepare the indoor unit's piping and drain hose for easy connection later. 3. Smooth all round Inside is recommended. 22 Multi type Air Conditioner Drain hose Drain hose Tape Connecting pipe Drain hose Connecting cable Connecting cable Drain hose Loop Gas side piping Liquid side piping If a flared ...
...• Make a small loop with the cable for installation through the piping hole. • Do not connect the cable to overflow inside the room, insulate the hose with the figure by ) and pull the tubing and drain hose away from the outdoor unit through the wall. 2. Route ... cable. Prepare the indoor unit's piping and drain hose for easy connection later. 3. Smooth all round Inside is recommended. 22 Multi type Air Conditioner Drain hose Drain hose Tape Connecting pipe Drain hose Connecting cable Connecting cable Drain hose Loop Gas side piping Liquid side piping If a flared ...
Service Manual
Page 39
...Cool Type 1. Reattach the cover by pulling it according to the arrow direction. tem is started by pressing timer cancel button five times continuously. (Room type) I Anchor the outdoor unit with an anti-vibration rubber. I When installing on a concrete or rigid mount. I Carry out the test...the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of the rated voltage. Otherwise, the air conditioner should not be paid. Then attention must provide at least 90% of wind and earthquake. R-410A 35°C (95°F) 8.5~9.5kg/...
...Cool Type 1. Reattach the cover by pulling it according to the arrow direction. tem is started by pressing timer cancel button five times continuously. (Room type) I Anchor the outdoor unit with an anti-vibration rubber. I When installing on a concrete or rigid mount. I Carry out the test...the wall, roof or rooftop, anchor the mounting base securely with a nail or wire assuming the influence of the rated voltage. Otherwise, the air conditioner should not be paid. Then attention must provide at least 90% of wind and earthquake. R-410A 35°C (95°F) 8.5~9.5kg/...
Service Manual
Page 46
... function will be operated while in accordance with selecting the function. Natural Air Control by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in any operation mode with selecting the function. • The ...to low(Cooling), med(Heating) speed. • The unit will be set at 28°C(82.4°F). 46 Multi type Air Conditioner Defrost(Deice) control (Heating) • Both the indoor and outdoor fan stops during outdoor unit operation.(Cooling model only) Desire...
... function will be operated while in accordance with selecting the function. Natural Air Control by Remote controller Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in any operation mode with selecting the function. • The ...to low(Cooling), med(Heating) speed. • The unit will be set at 28°C(82.4°F). 46 Multi type Air Conditioner Defrost(Deice) control (Heating) • Both the indoor and outdoor fan stops during outdoor unit operation.(Cooling model only) Desire...
Service Manual
Page 48
Operation Remote Control Operation The Remote Controller transmits the signals to set the desired horizontal airflow direction. 48 Multi type Air Conditioner Signal transmitter 5 1 6 3 4 2 10 CANCEL 7 9 ON OFF SET 11 AUTO CLEAN 16 8 12 °C/°F 13 17 18 14 15 ... 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-purification function...
Operation Remote Control Operation The Remote Controller transmits the signals to set the desired horizontal airflow direction. 48 Multi type Air Conditioner Signal transmitter 5 1 6 3 4 2 10 CANCEL 7 9 ON OFF SET 11 AUTO CLEAN 16 8 12 °C/°F 13 17 18 14 15 ... 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-purification function...
Service Manual
Page 58
Schematic Diagram Wiring Diagram 1. A2UH243FA0(LMU240HE) 2. Outdoor Unit 1. A2UC243FA0(LMU240CE) 58 Multi type Air Conditioner Room Type Indoor Unit -S4/SE chassis 2. Art Cool Type Indoor Unit 3.
Schematic Diagram Wiring Diagram 1. A2UH243FA0(LMU240HE) 2. Outdoor Unit 1. A2UC243FA0(LMU240CE) 58 Multi type Air Conditioner Room Type Indoor Unit -S4/SE chassis 2. Art Cool Type Indoor Unit 3.
Service Manual
Page 64
C/V2 C/V1 Th2 Th1 Cons. A2UC243FA0 (LMU240CE) Air Sensor Sensor 64 Multi type Air Conditioner A2UH243FA0(LMU240HE) Ø 9.52 strainer R/Valve 5220AR3228E S/W Eva. Sensor Ø 6.35 Acc. Comp (GK094K) Cons. Comp (GK141K) LEV-B LEV-A LEV 15RC strainer 2. Sensor Air Sensor A-Room B-Room Eva. Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram 1.
C/V2 C/V1 Th2 Th1 Cons. A2UC243FA0 (LMU240CE) Air Sensor Sensor 64 Multi type Air Conditioner A2UH243FA0(LMU240HE) Ø 9.52 strainer R/Valve 5220AR3228E S/W Eva. Sensor Ø 6.35 Acc. Comp (GK094K) Cons. Comp (GK141K) LEV-B LEV-A LEV 15RC strainer 2. Sensor Air Sensor A-Room B-Room Eva. Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram 1.
Service Manual
Page 66
... low. Suction pressure (Compared with the normal value) Higher Temperature (Compared with putty. 66 Multi type Air Conditioner Temp. When the room air humidity is relatively lower temperature difference is smaller. Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Current is ...kg/cm2G at the beginning of refrigerant(Leakage) Clogging Description Current is low. Check temperature difference between intake and discharge air depends on room air humidity. Temp. Difference Operating Current Temp. difference Current : approx. 0°C(32°F) : less than 80%...
... low. Suction pressure (Compared with the normal value) Higher Temperature (Compared with putty. 66 Multi type Air Conditioner Temp. When the room air humidity is relatively lower temperature difference is smaller. Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. Current is ...kg/cm2G at the beginning of refrigerant(Leakage) Clogging Description Current is low. Check temperature difference between intake and discharge air depends on room air humidity. Temp. Difference Operating Current Temp. difference Current : approx. 0°C(32°F) : less than 80%...