Model reference

LG NS071LDXEA

Air Conditioner

1 document28 error codes4 service modes

Available documentation

Service Manual

System Air Conditioner97 pg
Covers this model

MyPros+ Max

Diagnose your LG NS071LDXEA.

Step-by-step diagnostics from the service manual
Test values, resistance specs, and wiring references
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M+

M+ Max·LG Air Conditioner

E201 on my LG NS071LDXEA

M+

Unit quantity mismatch between indoor

From Service Manual 375614, p.26:

1.Access service mode to confirm the active fault code and read stored error history.

2.Measure door lock assembly resistance across PTC terminals. Expected: ~200 ohms cold.

3.Inspect strike and latch alignment. A misaligned strike prevents the switch stack from closing.

Part 6601ER1004C

Door lock assembly

Error codes (28)

CodeMeaning

E201Unit quantity mismatch between indoor and outdoor units.E202Abnormal state, no communication between Indoor and Outdoor Main PCB.E2031 minute timeout of communication error between Main and Inverter PCB.E221Outdoor temperature sensor error (open/short).E231Condenser temperature sensor error (open/short).E251Discharge temperature sensor error (open/short).E320OLP sensor error (open/short).E403Detection of outdoor freezing when compressor is stopped.E404Protection of outdoor overload when compressor is stopped.E416Discharge temperature of compressor in outdoor unit is overheated.E440Heating operation is not available since outdoor air temperature is over 30°C.E441Cooling operation is not available since outdoor air temperature is lower than…E458Outdoor unit BLDC Fan 1 error.E461Compressor starting error.E462Primary current trip error.E463Over current trip / PFC over current error.E464IPM (IGBT Module) over current (O.C).E465Compressor overload error.E466DC-Link voltage under/over error.E467Compressor wire missing error.E468Current sensor error.E471Outdoor EEPROM read/write error.E474IPM (IGBT Module) or PFCM temperature sensor error.E475Outdoor unit BLDC Fan 2 error.E484PFC overload error.E500IPM (heatsink) is overheated.E554Gas leak error (outdoor unit refrigerant full leakage).E556Capacity mismatch between indoor and outdoor units.

Service modes (4)

Option Setup Mode - Type A (Wireless Remote)["Remove batteries from the remote control.","Press the temperature up and down buttons…
Option Setup Mode - Type B (Wireless Remote)["Remove the battery from the remote controller.","Press the Off Timer and Cancel buttons…
Option Setup Mode - Type MR-DH00 (24-digit wireless remote)["Remove batteries from the remote controller.","Insert batteries while pressing High Temp button…
Outdoor Unit TEST Operation["Turn on power to the outdoor unit.","Press K900 button on the MAIN PCB.","Press once for cooling…

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

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