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Model reference

LG LP121CSD-Y8

Air Conditioner

1 document7 error codes2 service modes

Available documentation

Service Manual

  • Window Air Conditioner SVC MANUAL(Exploded View) MODEL: LP120CSD-Y854 pg
    Covers this model
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  • Step-by-step diagnostics from the service manual
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Error codes (7)

CodeMeaning
CH 01Indoor Air Thermistor ErrorCH 02Indoor Coil Thermistor ErrorCH 03Outdoor Air Thermistor Error (PTHP Only)CH 04Outdoor Coil Thermistor Error (PTHP Only)CH 05Mode ErrorCH 06Set point ErrorCH 07Bad Thermistor Wiring

Service modes (2)

  • LED Self-Diagnosis (Electrical Controls)Observe the green OPERATION LED on the Display PCB
  • LED Self-Diagnosis (Manual Controls)Observe the green OPERATION LED on the Display PCB

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

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