Daikin Altherma EVLQ05+08CA, Installer'S Reference Manual

Page: 210 / 252

13 | Troubleshooting
Installer reference guide
210
EHYH EHYHBH/X08AF + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1F – 2020.10
13.3.12 Symptom: The burner ignites noisily
Possible causes Corrective action
Gas supply pressure too high. The house pressure switch may be
faulty. Contact the gas company.
Incorrect ignition gap. ▪ Replace the ignition pin.
▪ Check the ignition electrode gap.
Gas/air adjustment NOT correctly set. Check the setting. See "To check the
CO₂ setting" [
4
177].
Weak spark. Check the ignition gap.
Replace the ignition electrode.
Replace the ignition unit on the gas
valve.
28.3~30.2 mm
a
a Spark gap (±4.5 mm)
13.3.13 Symptom: The burner resonates
Possible causes Corrective action
Gas supply pressure too low. The house pressure switch may be
faulty. Contact the gas company.
Recirculation of combustion gasses. Check the flue gas and the air supply.
Gas/air adjustment NOT correctly set. Check the adjustment. See "To check
the CO₂ setting" [
4
177].
13.3.14 Symptom: No space heating by the gas boiler
Possible causes Corrective action
Heat pump error Check the user interface.
Communication problem with the heat
pump. Make sure the communication cable is
properly installed.
Incorrect heat pump settings. Check the settings in the heat pump
manual.
The service display displays " ", the gas
boiler is switched off. Switch on the gas boiler with .
No current (24 V) ▪ Check the wiring.
▪ Check the connector X4.
The burner does NOT fire on space
heating: sensor S1 or S2 faulty. Replace sensor S1 or S2. See "Error
codes of the gas boiler" [ 4 218].
Burner does NOT ignite. See "13.3.11 Symptom: The burner
does NOT ignite" [
4
209].