Model reference

LG CRUN/CRNNSERIES

Heat Pump

1 document34 error codes6 service modes

Available documentation

Service Manual

System Heat Pump Air Conditioner SERVICE MANUAL257 pg
Covers this model

MyPros+ Max

Diagnose your LG CRUN/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 open or short circuit detected.02Indoor unit inlet pipe sensor open or short circuit detected.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 detected.07Indoor unit is operating in a different mode than the other connected indoor…09Serial number error 21DC peak 22Max CT 23DC link 24High pressure 25Low/over voltage 32Inverter compressor discharge temperature 33Constant speed compressor discharge temperature 34High pressure 35Low pressure 40CT sensor open or short.41Inverter compressor discharge pipe sensor open or short.42Low pressure sensor open or short.43High pressure sensor open or short.44Outdoor unit air sensor open or short.45Outdoor unit pipe sensor (left) open or short.46Suction pipe sensor open or short.47Normal compressor discharge pipe sensor open or short.48Outdoor unit pipe sensor (right) open or short.49Voltage sensor open or short.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 (CRUN1008T1 only).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 (6)

Automatic Addressing (CRUN1008T1)["Wait 1 minute after power on.","Press switch SW02M on outdoor unit control board for 5…
Automatic Addressing (CRUN458S1)["Wait 1 minute after power on.","Press switch SW01M on outdoor unit control board for 5…
Forced Operation (Convertible type)["Press the Forced Operation Button."]
Forced Operation (Wall Mounted / Art Cool types)["Open the front panel upward.","Press the power button once."]
Test Operation (Convertible type)["Press the forced operation switch for about 3 seconds."]
Test Operation (Wall Mounted / Art Cool types)["Open the front panel upward.","Press and hold the power button for about 3 seconds."]

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

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