Intergas Heating Ltd
41
Air in the gas pipe.
Remove air form gas pipe.
No
Gas supply pressure to low. Contact the gas supply company.
No
No ignition. Replace ignition electrode.
No
No spark. Ignition unit on gas valve faulty.
Check the cabling. Check the spark plug cap. Replace the ignition unit.
No
Gas/air adjustment not correctly set. Check adjustment. See gas/air adjustment.
No
Fan faulty. Check the wiring. Check the fuse , if necessary, replace the fan.
No
Fan dirty. Clean the fan.
No
Gas valve faulty.
Replace the gas valve. Re-adjust the gas valve, see gas/air adjustment.
11.2.2 Burner ignites noisily
Possible causes: Solution:
Gas supply pressure to high. The house pressure switch may be faulty. Contact the gas company.
No
Incorrect ignition gap.
Replace the ignition pin.
Check the ignition electrode gap.
No
Gas/air adjustment not correctly set.
Check the setting. See gas/air adjustment.
No
Weak spark.
Check the ignition gap.
Replace the ignition electrode.
Replace the ignition unit on the gas valve.
11.2.3 Burner resonating
Possible causes: Solution:
Gas supply pressure too low.
The house pressure switch may be faulty. Contact the gas company.
No
Recirculation of combustion gasses. Check the gas flue an the air supply.
No
Gas/air adjustment not correctly set. Check the setting, see gas/air adjustment.
11.2.4 No heating (CH)
Possible causes: Solution:
Room thermostat / weather-dependent
adjustment not closed or faulty.
Check the wiring.
Replace the thermostat.
Replace the weather-dependant adjustment.
No
No current (24 V).
Check the wiring against the diagram.
Check the connector X4.
Pin must touch test tool
Pin must not touch test tool
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