ACV International
47
8.2.2
Burner ignites noisily
Possible causes:
Solution:
Gas supply pressure to high.
Yes
The house pressure switch may be faulty.Contact the gas company
No
Incorrect ignition gap.
Yes
Replace the ignition pin
Check the ignition pin gap.
No
Gas/air adjustment not correctly set.
Yes
Check the setting. See gas/air adjustment.
No
Weak spark.
Yes
Check the ignition gap.
Replace the ignition pin.
Replace the ignition unit on the gas block.
Spark gap app. 4.5 mm
8.2.3
Burner resonating
Possible causes:
Solution:
Gas supply pressure to low
Yes The house pressure switch may be faulty. Contact the gas company.
No
Recirculation of combustion gasses.
Yes Check the gas flue an the air supply.
No
Gas/air adjustment not correctly set.
Yes Check the setting, see gas/air adjustment.
8.2.4
No heating (CH)
Possible causes:
Solution:
Room thermostat / weather-dependent
adjustment not closed or faulty.
Yes
Check the wiring.
Replace the thermostat.
Replace the weather-dependant adjustment.
No
No current (24 V).
Yes
Check the wiring against the diagram.
Check the connector X4.
Replace the faulty manager.
No
Pump not running.
Yes
Check the power supply.
Check connector X2.
Replace faulty pump.
Replace faulty manager.
No
Burner not firing on CH: sensor S1 or S2 faulty.
Yes
Replace sensor S1 or S2. See fault code, temperature display: 1 or 2.
No
Burner does not ignite.
Yes
See burner does not ignite.
