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E1

E1 - Malfunction of outdoor unit PCB (Outdoor Unit)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does E1 mean?

This code indicates a fault within the main control board (PCB) of the outdoor unit.

Common Causes

  • Defective outdoor unit control board
  • Power surge damaging the board
  • Internal component failure

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Turn off the power to the unit at the breaker.

  2. 2

    Wait for 60 seconds, then turn the power back on.

  3. 3

    If the error persists, the control board likely needs replacement by a qualified technician.

Browse all codes in this manual (60)
Verified technical data. Last updated: April 2026

Related Faults

6-06-0 - External protection device activated (Heat reclaim ventilator)6-16-1 - Malfunction of PCB (Heat reclaim ventilator)6-26-2 - Ozone density abnormal (Heat reclaim ventilator)
Source: Simple Self Diagnosis by Malfunction Code | Daikin
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