8.
FAULTS
When the controller detects a fault, the red fault LED flashes (above the
Reset button) and a fault code is shown on the Temperature display.
After the fault has been remedied, the controller can be restarted by
pressing the Reset button for 5 secs.
The following faults are detected and displayed:-
Temperature
display
Description Possible
cause/remedy
10, 11, 12, 13, 14 Sensor fault S1
•
Check the wires for breaks
•
Replace S1
20, 21, 22, 23, 24 Sensor fault S2
•
Check the wires for breaks
•
Replace S2
0
Sensor fault after self-check
•
Replace boiler sensor S1 and/or S2
1
Temperature too high
•
Air in system
•
Pump does not run
•
Too little circulation in system, radiators closed,
pump setting too low
2
Exchange S1 and S2
•
Check the cable loom
•
Replace S1 or S2
4
No flame signal
•
Gas tap closed
•
Incorrect ignition distance
•
Gas inlet pressure too low or disappears
•
Gas valve or ignition unit does not receive voltage
5
No flame signal
•
Condensate discharge blocked
•
Check setting of gas valve
6 Flame
detection
fault
•
Replace ignition cable + spark probe
•
Replace ignition unit
•
Replace controller
8
Fan speed incorrect
•
Fan rubs against casing
•
Wiring between fan and casing
•
Check the wires for poor contact (tacho signal)
•
Replace fan
29, 30
Gas valve relay fault
•
Replace controller
42
