Daikin EHYHBH05AAV3 Service Manual page 91

ESIE13-02A
2.4.4 No heating (CH)
2.4.5 Symptom: No space heating
Possible causes
Heat pump error.
Communication problem with the heat pump.
Incorrect heat pump settings.
The service display displays "_", the gas boiler is
switched off.
No current (24 V).
The burner does NOT fire on space heating:
sensor S1 or S2 faulty.
Burner does NOT ignite.
Error Codes: Gas Condensing Boiler
Corrective action
Check the user interface.
Make sure the communication cable is properly
installed.
Check the settings in the heat pump manual.
Switch on the gas boiler with
Check the wiring.
Check the connector X4.
Replace the faulty pump.
Replace sensor S1 or S2. See "Error codes of
the gas boiler" on page 87.
See "2.4.1-Burner does not ignite" on page 89.
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Part 4 – Troubleshooting
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