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Heat pump failure

Heat pump failure symbol — System in Emergency mode

Daikin · Altherma 3 H HT W

What does Heat pump failure mean?

The symbol 'c' on the display indicates that the heat pump has failed and the system is operating in Emergency mode. Domestic hot water or heating might be reduced or unavailable.

Common Causes

  • Heat pump is damaged or has failed

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to the 'Error' menu on the user interface for a detailed description of the fault.

  2. 2

    Note if the system is providing reduced heating or hot water.

  3. 3

    Contact your installer for diagnosis and repair.

Browse all codes in this manual (11)
Verified technical data. Last updated: April 2026

Related Faults

Blinking blue LEDBlinking blue LED — Unit is in standby modeBlinking red LEDBlinking red LED — An error has occurredContinuous blue LEDContinuous blue LED — Unit is operating
Source: Daikin Altherma 3 H HT W
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