ErrorCodeDoctor
Daikin · Air Conditioner

Daikin Air Conditioner E1 error code

Difficulty: Hard · Cost: $150–$500 · Duration: Requires professional service

The E1 error means your Daikin air conditioner detected a fault with the outdoor unit's main PCB. This can also be caused by defective connection of the indoor-outdoor relay wires. Contact a qualified technician to inspect the outdoor unit PCB and relay wiring.

Common causes

  • Outdoor unit PCB has malfunctioned or failed
  • Indoor-outdoor relay wires have a defective connection

How to fix it

  1. 1

    Contact a qualified technician to inspect the outdoor unit PCB and wiring connections

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