ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner PJ error code

Difficulty: Hard · Cost: $80–$300 · Duration: Requires professional service

The PJ error means your Daikin air conditioner detected a mismatch between the inverter PCB and the fan driver. This typically occurs after an outdoor unit main PCB was replaced without performing the required field settings. Contact a qualified technician to correct the PCB type settings.

Common causes

  • Mis-matching of PCB type
  • Improper or missing field setting after replacing the outdoor unit main PCB

How to fix it

  1. 1

    Contact a qualified technician to perform the required field settings after PCB replacement

Related Daikin Air Conditioner error codes

1

A0

An external protection device connected to the indoor unit has been activated

hard
2

A1

A fault was detected in the indoor unit PCB (control board)

hard
3

A3

The drain level control system has detected an abnormality — drain may be clogged

medium
4

A5

Freeze-up protection (cooling) or high pressure control (heating) has activated — check the air filter

easy