Model reference

LG CRNNSERIES

Air Conditioner

1 document34 error codes8 service modes

Available documentation

Service Manual

Air Conditioner Service Manual - Heat Pump Air Conditioner SVC MANUAL245 pg
Covers this model

MyPros+ Max

Diagnose your LG CRNNSERIES.

Step-by-step diagnostics from the service manual
Test values, resistance specs, and wiring references
Verified part numbers when replacement is needed

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Error codes (34)

CodeMeaning

01Indoor unit air sensor (room temperature sensor) open or short circuit.02Indoor unit inlet pipe sensor open or short circuit.03Wired remote controller to indoor unit transmission error 04Drain pump malfunction 05Outdoor unit to indoor unit transmission error 06Indoor unit outlet pipe sensor open or short circuit.07Indoor unit is operating in a different mode than other connected indoor units…09Serial number error 21DC peak 22Max CT 23DC link 24High pressure 25Low/over voltage 32Inverter compressor discharge temperature too high 33Constant speed compressor discharge temperature too high 34High pressure 35Low pressure 40CT sensor open or short circuit.41Inverter compressor discharge pipe sensor (discharge temperature) open or short.42Low pressure sensor open or short circuit.43High pressure sensor open or short circuit.44Outdoor unit air sensor open or short circuit.45Outdoor unit pipe sensor (left) open or short circuit.46Suction pipe sensor open or short circuit.47Normal (constant speed) compressor discharge pipe sensor open or short circuit.48Outdoor unit pipe sensor (right) open or short circuit.49Voltage sensor open or short circuit.51Indoor connection over capacity 52Transmission error from inverter PCB to main PCB in outdoor unit 53Transmission error from indoor unit to main PCB in outdoor unit

View all 34 error codes

54Reverse connection or disconnection of R,S,T power line to outdoor unit.55Transmission error from central controller to main PCB in outdoor unit 56Transmission error from main PCB in outdoor unit to central controller 57Transmission error from main PCB to inverter PCB in outdoor unit

Service modes (8)

Automatic Addressing (CRUN1008T1)1
Automatic Addressing (CRUN458S1)1
Forced OperationPress the forced operation button (power button on main unit). Unit selects operation mode based on…
Forced Operation (Convertible type)Press the Forced Operation Button once.
Forced Operation (Wall Mounted / Art Cool types)Open the front panel
Test Operation (Convertible type)Press the forced operation switch and hold for about 3 seconds.
Test Operation (Wall Mounted / Art Cool Mirror / Art Cool / Art Cool Wide)Open the front panel upward and press the power button for about 3 seconds.
Test Operation (Wall Mounted / Art Cool types)Open the front panel upward

Full entry steps, exit procedures, and test sequences are available in Max.

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