ROTEX Heating Systems GmbH
46
8.3
Other faults
8.3.1
Boiler controller is noisy when igniting
Possible causes:
Solution:
Gas supply pressure too high.
Yes
The home pressure controller may be faulty. Contact the energy company.
No
Incorrect ignition distance.
Yes
Check the ignition pin distance.
Replace the ignition pin.
No
Gas/air regulation not correctly configured.
Yes
Check the setting, see gas/air regulation.
No
Weak spark.
Yes
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
The home pressure controller may be faulty. Contact the gas company.
No
Recirculation combustion gases.
Yes
Check the combustion gas outlet and air supply.
No
Gas/air regulation not configured correctly.
Yes
Check the setting, see gas/air regulation.
No
Boiler controller gasket faulty.
Yes
Replace the boiler controller gasket.
No
Boiler controller faulty.
Yes
Replace the boiler controller.
8.3.3
No heating (CH)
Possible causes:
Solution:
The service display shows a hyphen (
-
).
The boiler is off.
Yes
Switch on the boiler with the button.
No
Room thermostat/weather dependent regulation
not closed or faulty.
Yes
Check the wiring.
Check OpenTherm and On/off connection of the unit.
Replace the thermostat.
Replace the weather-dependent regulation.
No
Pump is not running. Display shows 80 and 1. Yes
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
No electrical supply (24 V).
Yes
Replace the faulty controller. Check the wiring in accordance with the diagram.
Check the connector X4.
Replace the faulty controller.
Checking mold ignition pin position
Pin must touch mold
Pin must not touch mold
