34
POSSIBLE CAUSES
Faulty PCB
FAULT 5
Flame Supervision Failure, Indicator Light On, Burner Off
5 seconds - 1 sec - 1 sec - 1sec - 1 sec - 1 sec - 5 seconds
If a flame is detected 10 seconds after shut down has occurred, the boiler will lock out.
During this lock out sequence, both the pump and fan will continue to run.
POSSIBLE CAUSES
Ionisation electrode breakdown
Gas valve failure
PCB failure.
FAULT 6
Water Overheating
5 seconds - 1 sec - 1 sec - 1 sec - 1 sec - 1 sec - 1 sec - 5 seconds
Overheat protection is maintained electronically via the central heating thermistor which
'polices' the primary water circuit within the heat exchanger and operates in both domestic
hot water and central heating modes. Further overheat protection is provided by the high
limit thermostat which operates on an electro mechanical principal.
POSSIBLE CAUSES
Lock out takes place if the temperature of the heating circuit exceeds 105 deg C,
any excess heat is dispersed by the pump which activates automatically in the
event of overheat and will continue to run until temperature reduces to 85 deg
Celsius.
Minimum burner pressure too high
Flow switch jammed.
To Next Page
Loading...
