LG Multi Split Units Error Code
LG Air Conditioning Multi F(DX) Fault Codes Sheet.Multi Split UnitsIf there is a fault on any LG Multi unit, an Error mark is indicated on the display window of the indoor unit, wired-remote controller, and LED’s of outdoor unit control board.
Indoor unit faults = CH01 or C1
Fascia LED’s
– RED = None
– GREEN = 1 Flash
Contents = Indoor Air Sensor (Open/Short)
Case of Error = Open or Short Circuit
Indoor Status = Off
Indoor unit faults = CHO2 or C2
Fascia LED’s
– RED = None
– GREEN = 2 Flash
Contents = Inlet Pipe Sensor
Case of Error = Open or Short Circuit
Indoor Status = Off
Indoor unit faults = CH03 or C3
Fascia LED’s
– RED = None
– GREEN = 3 Flash
Contents = Communication (Indoor Wired R/Control)
Case of Error = Data Communication Fault
Indoor Status = Off
Indoor unit faults = CH04 or C4
Fascia LED’s
– RED = None
– GREEN = 4 Flash
Contents = Drain Pump / Float Switch
Case of Error = Float Switch Open Circuit (High Level Water Alarm)
Indoor Status = Off
Indoor unit faults = CH05 or C5
Fascia LED’s
– RED = None
– GREEN = 5 Flash
Contents = Communication Error (Indoor Outdoor)
Case of Error = Data Communication Fault
Indoor Status = Off
Indoor unit faults = CH06 or C6
Fascia LED’s
– RED = None
– GREEN = 6 Flash
Contents = Outlet Pipe Sensor
Case of Error = Open or Short Circuit
Indoor Status = Off
Indoor unit faults = CH07 or C7
Fascia LED’s
– RED = None
– GREEN = 7 Flash
Contents = Different Operation Mode
Case of Error = Indoor Unit is Set in Different Cool/Heat Operation Mode
Indoor Status = Off
Indoor unit faults = CH09 or C9
Fascia LED’s
– RED = None
– GREEN = 9 Flash
Contents = EEPROM Check Sum
Case of Error = Check Sum Mis-matching
Indoor Status = Off
Indoor unit faults = CH10 or CA
Fascia LED’s
– RED = 1 Flash
– GREEN = None
Contents = BLDC Fan Motor Lock
Case of Error = Fan Motor not Operating
Indoor Status = Off
Indoor unit faults = HL
Fascia LED’s
– RED =
– GREEN =
Contents = High Limit (Float Switch) or Hard Lock
Case of Error = Same as CH 04 (Float Switch Open Circuit) or Unit under Central Control
Indoor Status = Off
Indoor unit faults = CL
Fascia LED’s
– RED =
– GREEN =
Contents = Child Lock Function Selected
Case of Error = Not an Error, Press Timer & Min Buttons Simultaneously for 3 seconds to Toggle On/Off
Indoor Status = On
Indoor unit faults =
Fascia LED’s
– RED =
– GREEN =
Contents = Jet Cool Mode Selected
Case of Error = Not an Error, Press Jet Cool Button to Toggle On/Of
Indoor Status = On
Indoor unit faults = Lo
Fascia LED’s
– RED =
– GREEN =
Contents = System in Test Mode
Case of Error = Not an Error
Indoor Status = On
Outdoor Unit Faults can also be read from the outdoor unit PCB using the flashing LED’s as below:
Error code = 21
Contents = IPM Fault (Compressor Over Current)
LED01G (Red) = 2 times
LED02G (Green) = 1 time
Case of Error = Compressor Malfunction, IPM Fault
Outdoor Status = Off
Error code = 22
Contents = CT 2 (Max. Current)
LED01G (Red) = 2 times
LED02G (Green) = 2 times
Case of Error = Current is 14A
Outdoor Status = Off
Error code = 23
Contents = DC Link Low Volt
LED01G (Red) = 2 times
LED02G (Green) = 3 times
Case of Error = DC Link Voltage is 140V
Outdoor Status = Off
Error code = 24
Contents = Low / High Pressure
LED01G (Red) = 2 times
LED02G (Green) = 4 times
Case of Error = Low / High Press Switch OPEN Circuit
Outdoor Status = Off
Error code = 25
Contents = AC Low / AC High Volts
LED01G (Red) = 2 times
LED02G (Green) = 5 times
Case of Error = Abnormal AC Input Voltage (140V , 300V )
Outdoor Status = Off
Error code = 26
Contents = DC Compressor Position
LED01G (Red) = 2 times
LED02G (Green) = 6 times
Case of Error = Position Detection Error
Outdoor Status = Off
Error code = 27
Contents = PSC Fault (Reactor)
LED01G (Red) = 2 times
LED02G (Green) = 7 times
Case of Error = Over Current at “IGBT”
Outdoor Status = Off
Error code = 28
Contents = DC Link High Volts
LED01G (Red) = 2 times
LED02G (Green) = 8 times
Case of Error = DC Link Voltage is 420V
Outdoor Status = Off
Error code = 32
Contents = Discharge Pipe Temp. High (INV. Compressor)
LED01G (Red) = 3 times
LED02G (Green) = 2 times
Case of Error = Discharge Sensor High Temp. (105oC )
Outdoor Status = Off
Error code = 33
Contents = Discharge Pipe Temp. High (Cons. Compressor)
LED01G (Red) = 3 times
LED02G (Green) = 3 times
Case of Error = Discharge Sensor High Temp. (105oC )
Outdoor Status = Off
Error code = 40
Contents = CT Circuit
LED01G (Red) = 4 times
LED02G (Green) =
Case of Error = CT Circuit malfunction Off
Outdoor Status = Off
Error code = 41
Contents = D-Pipe Sensor INV. Compressor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 1 times
Case of Error = Open / Short Circuit
Outdoor Status = Off
Error code = 44
Contents = Air Sensor (Open/Short
LED01G (Red) = 4 times
LED02G (Green) = 4 times
Case of Error = Open / Short circuit
Outdoor Status = Off
Error code = 45
Contents = Cond. Pipe Sensor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 5 times
Case of Error = Open / Short circuit
Outdoor Status = Off
Error code = 46
Contents = Suction Pipe Sensor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 6 times
Case of Error = Open / Short circuit
Outdoor Status = Off
Error code = 47
Contents = D-Pipe Sensor Cons. Compressor (Open/Short)
LED01G (Red) = 4 times
LED02G (Green) = 7 times
Case of Error = Open / Short circuit
Outdoor Status = Off
Error code = 48
Contents = D-Pipe & Air Sensor (Open)
LED01G (Red) = 4 times
LED02G (Green) = 8 times
Case of Error = Dual Sensor unplugged
Outdoor Status = Off
Error code = 51
Contents = Over Capacity
LED01G (Red) = 5 times
LED02G (Green) = 1 times
Case of Error = Over Capacity Combination
Outdoor Status = Off
Error code = 53
Contents = Communication Error (Indoor Outdoor)
LED01G (Red) = 5 times
LED02G (Green) = 3 times
Case of Error = Poor/Loss of Communication
Outdoor Status = Off
Error code = 60
Contents = EEPROM Check Sum
LED01G (Red) = 6 times
LED02G (Green) =
Case of Error = Check Sum Mis-Match
Outdoor Status = Off
Error code = 61
Contents = Cond. Pipe Sensor Temp
LED01G (Red) = 6 times
LED02G (Green) = 1 time
Case of Error = Cond. Temp. High (65oC )
Outdoor Status = Off
Error code = 62
Contents = Heat Sink Sensor Temp
LED01G (Red) = 6 times
LED02G (Green) = 2 times
Case of Error = Heat Sink Temp. High (85oC )
Outdoor Status = Off
Error code = 65
Contents = Heat Sink Sensor (Open/Short)
LED01G (Red) = 6 times
LED02G (Green) = 5 times
Case of Error = Open / Short circuit
Outdoor Status = Off
Lg Error Codes- Check Points
