Daikin Altherma C Gas W EHOB42ABV1H Instructions D'installation page 45

8.3 Other faults
8.3.1 Boiler controller is noisy when igniting
Possible causes:
Gas supply pressure too high.
No 
Incorrect ignition distance.
No 
Gas/air regulation not correctly configured.
No 
Weak spark.
Checking mold ignition pin position
8.3.2 Boiler controller resonates
Possible causes:
Gas supply pressure too low.
No 
Recirculation combustion gases.
No 
Gas/air regulation not configured correctly.
No 
Boiler controller gasket faulty.
No 
Boiler controller faulty.
8.3.3 No heating (CH)
Possible causes:
The service display shows a hyphen (
The boiler is off.
No 
Room thermostat/weather dependent regulation
not closed or faulty.
No 
Pump is not running. Display shows 80 and 1.
No 
No electrical supply (24 V).
Daikin Europe NV
Solution:
Yes  The home pressure controller may be faulty. Contact the energy company.
Check the ignition pin distance.
Yes 
Replace the ignition pin.
Yes  Check the setting, see gas/air regulation.
Check the ignition distance.
Yes  Check and/or replace ignition cable.
Replace the ignition unit on the gas block. Replace the ignition pin.
Pin must touch mold
Solution:
Yes  The home pressure controller may be faulty. Contact the gas company.
Yes  Check the combustion gas outlet and air supply.
Yes  Check the setting, see gas/air regulation.
Yes  Replace the boiler controller gasket.
Yes  Replace the boiler controller.
Solution:
-
Switch on the boiler with the
).
Yes 
Check the wiring.
Check OpenTherm and On/off connection of the unit.
Yes 
Replace the thermostat.
Replace the weather-dependent regulation.
Check the electricity supply.
Check connector X2.
Yes 
Insert a screwdriver into the slot of the pump shaft and turn the shaft.
Replace faulty pump.
Replace the faulty controller. Check the wiring in accordance with the diagram.
Yes  Check the connector X4.
Replace the faulty controller.
Pin must not touch mold
button.
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