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