Technical data

44
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 seconds.
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 after 4 ignition
attempts
•
Gas tap closed
• Incorrect ignition distance
• Gas inlet pressure too low or disappears
• Gas valve or ignition unit does not receive voltage
• Further info can be found on Technical Data Sheet
TDS012 available on www.atmos.co.uk
5
No flame signal after 4 restart
attempts
•
Condensate discharge blocked
• Check setting of gas valve
• Further info can be found on Technical Data Sheet
TDS013 available on www.atmos.co.uk
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
8.1 Display last fault code.
It is possible to display the last fault code as follows:
• Set the appliance in the off mode using the On/Off key ( - on the service display).
• Press the Service key, until the last fault code appears flashing on the temperature display.
When no fault has occurred no code will be displayed.
• By pressing simultaneously the Service key and the “-“ key the fault code will be erased.