Service Manual
Page 2
... Disassembly ...49 Indoor Unit...49 Schematic Diagram...54 Electronic Control Device ...54 Wiring Diagram...58 Components Locations...59 Troubleshooting Guide ...64 Refrigeration Cycle Diagram ...64 Self-diagnosis Function ...65 Cycle Troubleshooting Guide...66 Electronic Parts Troubleshooting Guide 67 General Information...72 2-way, 3-way Valve ...78 Exploded View & Replacement Parts List 82 Indoor Unit...
... Disassembly ...49 Indoor Unit...49 Schematic Diagram...54 Electronic Control Device ...54 Wiring Diagram...58 Components Locations...59 Troubleshooting Guide ...64 Refrigeration Cycle Diagram ...64 Self-diagnosis Function ...65 Cycle Troubleshooting Guide...66 Electronic Parts Troubleshooting Guide 67 General Information...72 2-way, 3-way Valve ...78 Exploded View & Replacement Parts List 82 Indoor Unit...
Service Manual
Page 64
C/V2 C/V1 Th2 Th1 Cons. Comp (GK141K) LEV-B LEV-A LEV 15RC strainer 2. Comp (GK094K) Cons. A2UC243FA0 (LMU240CE) Air Sensor Sensor 64 Multi type Air Conditioner Sensor Ø 6.35 Acc. A2UH243FA0(LMU240HE) Ø 9.52 strainer R/Valve 5220AR3228E S/W Eva. Sensor Air Sensor A-Room B-Room Eva. Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram 1.
C/V2 C/V1 Th2 Th1 Cons. Comp (GK141K) LEV-B LEV-A LEV 15RC strainer 2. Comp (GK094K) Cons. A2UC243FA0 (LMU240CE) Air Sensor Sensor 64 Multi type Air Conditioner Sensor Ø 6.35 Acc. A2UH243FA0(LMU240HE) Ø 9.52 strainer R/Valve 5220AR3228E S/W Eva. Sensor Air Sensor A-Room B-Room Eva. Troubleshooting Guide Troubleshooting Guide Refrigeration Cycle Diagram 1.
Service Manual
Page 65
...(Open/Short) 51 Capcity Error(High/Low) 3 times 3 times OFF 4 times 4 times OFF 4 times 5 times OFF 4 times 7 times OFF 5 times 1 times OFF Service Manual 65 Troubleshooting Guide Self-diagnosis Function I Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. •...
...(Open/Short) 51 Capcity Error(High/Low) 3 times 3 times OFF 4 times 4 times OFF 4 times 5 times OFF 4 times 7 times OFF 5 times 1 times OFF Service Manual 65 Troubleshooting Guide Self-diagnosis Function I Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. •...
Service Manual
Page 66
... refrigerant leaked out. Temp. The suction pressure is usually 4.5~6.0 kg/cm2G at the beginning of refrigeration cycle Defective compressor Temp. Check refrigeration cycle. Notice: 1. Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. When the room air humidity is relatively lower temperature difference is low. Check temperature and pressure of refrigerant(Leakage) Clogging Description...
... refrigerant leaked out. Temp. The suction pressure is usually 4.5~6.0 kg/cm2G at the beginning of refrigeration cycle Defective compressor Temp. Check refrigeration cycle. Notice: 1. Troubleshooting Guide Cycle Troubleshooting Guide Trouble analysis 1. When the room air humidity is relatively lower temperature difference is low. Check temperature and pressure of refrigerant(Leakage) Clogging Description...
Service Manual
Page 67
Does "Beeping" sound is off. Electronic Parts Troubleshooting Guide ❇ Refer to the unit. • The connecting method of micom pin 29 : DC4.5V↑ Remedy 1) Replace power transfomer. 2) Replace power transfomer. 3) Replace ...; The P.W.B. Turn on outdoor PCB is made from the indoor unit? Trouble 1 The Product doesn't operate at all. Ass'y Procedure 1) The input voltage of the P.C.B. Troubleshooting Guide Turn off the main power and wait until LED on the main power again. tion of Micom is O.K. • Check CN-DISP1 The operation...
Does "Beeping" sound is off. Electronic Parts Troubleshooting Guide ❇ Refer to the unit. • The connecting method of micom pin 29 : DC4.5V↑ Remedy 1) Replace power transfomer. 2) Replace power transfomer. 3) Replace ...; The P.W.B. Turn on outdoor PCB is made from the indoor unit? Trouble 1 The Product doesn't operate at all. Ass'y Procedure 1) The input voltage of the P.C.B. Troubleshooting Guide Turn off the main power and wait until LED on the main power again. tion of Micom is O.K. • Check CN-DISP1 The operation...
Service Manual
Page 68
... after stopped. Check DISP PWB Ass'y -Voltage between CN1 DC +5V Check the Display PWB Ass'y • Check receiver ass'y 68 Multi type Air Conditioner Troubleshooting Guide Trouble 2 Product doesn't operate with the remote controller.
... after stopped. Check DISP PWB Ass'y -Voltage between CN1 DC +5V Check the Display PWB Ass'y • Check receiver ass'y 68 Multi type Air Conditioner Troubleshooting Guide Trouble 2 Product doesn't operate with the remote controller.
Service Manual
Page 69
... circuit of the Indoor temperature by 1°C at 25°C). ON DC 5V DC 1V↓ Comp. Check the open or short of Outdoor side. Troubleshooting Guide Trouble 3 The Compressor/Outdoor Fan are not engaged, Compressor/Outdoor fan is stopped. • Check the related circuit of R01H(1K), R02H(1K), R03H...
... circuit of the Indoor temperature by 1°C at 25°C). ON DC 5V DC 1V↓ Comp. Check the open or short of Outdoor side. Troubleshooting Guide Trouble 3 The Compressor/Outdoor Fan are not engaged, Compressor/Outdoor fan is stopped. • Check the related circuit of R01H(1K), R02H(1K), R03H...
Service Manual
Page 70
... Check the patterns and the conditions of connecting wires between Indoor and Outdoor unit. Check the connecting condition and disconnection of outdoor unit PWB Assy's. Troubleshooting Guide Trouble 4 When indoor Fan does not operate. Check the interference of Indoor Fan Indoor Fan may be stopped in Outdoor unit corresponds to be...
... Check the patterns and the conditions of connecting wires between Indoor and Outdoor unit. Check the connecting condition and disconnection of outdoor unit PWB Assy's. Troubleshooting Guide Trouble 4 When indoor Fan does not operate. Check the interference of Indoor Fan Indoor Fan may be stopped in Outdoor unit corresponds to be...
Service Manual
Page 71
... and GND. • Confirm that are catching and interfering parts in the rotation radial of the Vertical Louver Service Manual 71 Between 1 , 2 , 3 , 4 and 5 of IC01M - Troubleshooting Guide Trouble 5 When the louver does not operate. Between 2 , 3 , 4 and 5 of CN-UP/DOWN If there are no problems after above checks • Confirm the...
... and GND. • Confirm that are catching and interfering parts in the rotation radial of the Vertical Louver Service Manual 71 Between 1 , 2 , 3 , 4 and 5 of IC01M - Troubleshooting Guide Trouble 5 When the louver does not operate. Between 2 , 3 , 4 and 5 of CN-UP/DOWN If there are no problems after above checks • Confirm the...
Service Manual
Page 72
... unit PCB. 2. If the voltage of the sensor is 2.5Vdc / at 25°C (plugged) 10KΩ Ω 2.5Vdc V Check the resistance / voltage ❑ Check Point 1. Troubleshooting Guide Error Code I Trouble Shooting Error code Title 01 Indoor air sensor 02 Indoor inlet pipe sensor 06 Indoor outlet pipe sensor Cause of error...
... unit PCB. 2. If the voltage of the sensor is 2.5Vdc / at 25°C (plugged) 10KΩ Ω 2.5Vdc V Check the resistance / voltage ❑ Check Point 1. Troubleshooting Guide Error Code I Trouble Shooting Error code Title 01 Indoor air sensor 02 Indoor inlet pipe sensor 06 Indoor outlet pipe sensor Cause of error...
Service Manual
Page 73
... of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal. ❑ Check Point 1. Error code Title 05 / 53 Communication (Indoor ➔ Outdoor) Troubleshooting Guide Cause of error Check point & Normal condition • Power input AC 230V.(Outdoor, Indoor) • The connector for communication is correctly connected. 5. Check the...
... of outdoor PCB is abnormal. • Transmission circuit of indoor PCB is abnormal. ❑ Check Point 1. Error code Title 05 / 53 Communication (Indoor ➔ Outdoor) Troubleshooting Guide Cause of error Check point & Normal condition • Power input AC 230V.(Outdoor, Indoor) • The connector for communication is correctly connected. 5. Check the...
Service Manual
Page 74
... of error • Discharge sensor temp. Check the leakage of error Check point & Normal condition • Over Capacitor com- • Check the indoor unit capacity. Troubleshooting Guide Error code Title 33 D-Pipe Temp. Check the SVC V/V open . 115°C(239°F) 100°C(212°F) 95°C(203°F) COMP OFF...
... of error • Discharge sensor temp. Check the leakage of error Check point & Normal condition • Over Capacitor com- • Check the indoor unit capacity. Troubleshooting Guide Error code Title 33 D-Pipe Temp. Check the SVC V/V open . 115°C(239°F) 100°C(212°F) 95°C(203°F) COMP OFF...
Service Manual
Page 75
... is 0V or 5Vdc, then sensor is abnormal Service Manual 75 Error code Title 44 Outdoor air sensor 45 Condensor pipe sensor 47 D-Pipe sensor Troubleshooting Guide Cause of each sensor.(Plugged) 3. Estimate the resistance of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short •...
... is 0V or 5Vdc, then sensor is abnormal Service Manual 75 Error code Title 44 Outdoor air sensor 45 Condensor pipe sensor 47 D-Pipe sensor Troubleshooting Guide Cause of each sensor.(Plugged) 3. Estimate the resistance of error • Open / Short • Soldered poorly • Internal circuit error • Open / Short •...