15.3.12 Symptom: The burner ignites noisily
15.3.13 Symptom: The burner resonates
EVLQ05+08CA + EHYHBH05A + EHYHBH/X08A + EHYKOMB33AA
Daikin Altherma hybrid heat pump
4P355634-1G – 2022.09
Possible causes
No spark. Ignition unit on gas valve
faulty.
Gas/air adjustment NOT correctly set.
Fan faulty.
Fan dirty.
Gas valve faulty.
Possible causes
Gas supply pressure too high.
Incorrect ignition gap.
Gas/air adjustment NOT correctly set.
Weak spark.
a Spark gap (±4.5 mm)
Possible causes
Gas supply pressure too low.
Recirculation of combustion gasses.
Gas/air adjustment NOT correctly set.
15
Troubleshooting
|
Corrective action
▪
Check the cabling.
▪
Check the spark plug cap.
▪
Replace the ignition unit.
Check the adjustment. See
4
the CO₂
setting" [
187].
▪
Check the wiring.
▪
Check the fuse. If necessary, replace
the fan.
Clean the fan.
▪
Replace the gas valve.
▪
Re-adjust the gas valve, see
4
the CO₂
setting" [
187].
Corrective action
The house pressure switch may be
faulty. Contact the gas company.
▪
Replace the ignition pin.
▪
Check the ignition electrode gap.
Check the setting. See
4
CO₂
setting" [
187].
Check the ignition gap.
Replace the ignition electrode.
Replace the ignition unit on the gas
valve.
a
Corrective action
The house pressure switch may be
faulty. Contact the gas company.
Check the flue gas and the air supply.
Check the adjustment. See
4
the CO₂
setting" [
187].
"To check
"To check
"To check the
"To check
Installer reference guide
221