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H0

H0 - Malfunction of sensor system of compressor (Outdoor Unit)

Daikin · Simple Self Diagnosis by Malfunction Code | Daikin

What does H0 mean?

This code signals a problem with a sensor related to the compressor in the outdoor unit.

Common Causes

  • Faulty compressor sensor
  • Wiring issues
  • Internal compressor problem

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 and then restore power.

  3. 3

    If the error persists, professional diagnosis of the compressor sensors is required.

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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