ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner L5 error code

Difficulty: Hard · Cost: $300–$1500 · Duration: Requires professional service

The L5 error means your Daikin air conditioner's inverter detected an instantaneous overcurrent on the DC output. This is commonly caused by a defective compressor coil, a mechanically locked compressor, or a faulty inverter PCB. Contact a qualified technician urgently.

Common causes

  • Compressor coil has a wiring disconnection or insulation failure
  • Compressor has mechanically locked and failed to start
  • Inverter PCB has malfunctioned

How to fix it

  1. 1

    Contact a qualified technician urgently to inspect the compressor and inverter PCB

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