Error code reference

LG HVAC Error Code 9

LS902HPV/LS122HPV/LA09xHV/LA12xHV: ODU fan motor not rotating or not proving rotation. All other Inverters: IDU EEPROM error. PTAC (non-B models): High pressure switch tripped. PTAC B models: Failed EEPROM.

SourceLG Ductless HVAC & PTAC - Tech Sheet: Error Codes & Wiring

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Diagnostic procedure

The full 9 procedure

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MyPros+ · DiagnosticsStep 1 preview

First diagnostic step

For ODU fan: verify 310V DC on motor wires with motor plugged in; 0V DC=failed PCB, 310V DC=likely failed motor. PTAC: If sleeve is too deep, use air splitters. EEPROM: replace main PCB or mismatched IDU/ODU.

SourceLG Ductless HVAC & PTAC - Tech Sheet: Error Codes & Wiring

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More steps, wiring diagram references, and verified part numbers

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Where this code is documented

1 manual in the MyPros+ library documents this code for LG hvac.

Models covered by the manuals that document this code

More models are covered than are listed here.

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The full 9 procedure

Where this code is documented

Models covered by the manuals that document this code

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