47
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 with the checking mold.
Replace the ignition pin.
No
È
Gas/air regulation not correctly configured.
Yes
Æ
Check the setting, see Gas air regulation par.7.7 and par. 7.8.
No
È
Weak spark.
Yes
Æ
Check the ignition pin distance with the checking mold.
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. Lower than 20
mbar.
Yes
Æ
The home pressure controller may be faulty. Contact the energy company.
No
È
Recirculation combustion gases.
Yes
Æ
Check the combustion gas outlet and the air supply system.
No
È
Gas/air regulation not configured correctly.
Yes
Æ
Check the setting, see Gas air regulation par.7.7 and par. 7.8.
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 nothing.
Yes
Æ
Check whether the plug is in the socket.
No
È
The service display shows nothing.
Yes
Æ
Check the fuse, see Electrical diagram par. 10.1
No
È
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 connected or faulty.
Yes
Æ
Check the wiring.
Check OpenTherm, On/off connection of the unit, or the connection between CH
boiler and RF room thermostat .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 and X4.
No
È
Checking mold ignition pin position
Pin must touch test tool
Pin must not touch test tool
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