LG AC Error Codes and Troubleshooting

1. Split Type,
2. Mutli System,
3. Floor Standing,
4. Cassette Type,
5. PTAC Type,
6. Portable AC,
7. Troubleshooting and Manuals.

If there is a fault on any LG Universal Unit, a two digit number will appear on the remote controllers led display. If the unit does not have a remote controller the fault will be displayed using the LED’s on the front of the indoor unit.

The “Units” digit of the fault code is shown by the power led which has the following symbol by it. This is usually Red, but on a few models it is Green.

LG AC Error Codes and Troubleshooting

The “Tens” digit will be displayed by one other led, usually the “Sleep” or “Filter” lamp.

Error Indicator:

• The function provides self-diagnosis and displays an error code if there is any trouble.
• Error codes are displayed on the Indoor unit’s Wired Remote as CH**, and/or Fascia Display. In addition, the code is indicated via LED’s on the outdoor unit control board.
• If more than two troubles occur simultaneously, the lower number of error code is displayed first.
• After an error occurs, if error is released, error LED is also released simultaneously.

1.LG Split Type AC Error Codes

Indoor Unit Faults:

Error Codes	Trouble
C1 or CH1	Indoor temperature sensor open or closed circuit.
C2 or CH2	Outdoor temperature sensor open or closed circuit.
C4 or CH4	Heat sink temperature sensor open or closed circuit.
C5 or CH5	Communication between indoor and outdoor units.
C6 or CH6	Excessive current at inverter DC power circuit.
C7 or CH7	Excessive compressor current
C8 or CH8	Indoor fan not rotating.
C9 or CH9	Outdoor fan not rotating.
CA	Discharge temp more than130 °C 2. Faulty discharge thermistor
CC	EEPROM error
CD	Inverter module error
Po	System in Power Mode – not a fault
Lo	System in test mode – not a fault

2.LG Multi Type AC Error Codes

LG Multi Type AC Error Codes

Error Code = 01
Contents = Air sensor (open/short)
Case Of Error = Open / Short circuit
Indoor Status = Off

Error Code = 02
Contents = Inlet pipe sensor
Case Of Error = Open / Short circuit
Indoor Status = Off

Error Code = 03
Contents = Communication(Indoor Wired R/Control)
Case Of Error = Communication Poorly
Indoor Status = Off

Error Code = 04
Contents = Drain pump / Float switch
Case Of Error = Float switch Open circuit (High level water alarm)
Indoor Status = Off

Error Code = 05
Contents = Communication(Indoor Outdoor)
Case Of Error = Communication Poorly
Indoor Status = Off

Error Code = 06
Contents = Outlet pipe sensor
Case Of Error = Open / Short circuit
Indoor Status = Off

Error Code = 07
Contents = Different operation mode
Case Of Error = Indoor units set in different operation modes
Indoor Status = Off

Error Code = HL
Contents = High Limit (Float Switch)
Case Of Error = Same as code 04, Float switch Open circuit
Indoor Status = Off

Error Code = CL
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