Worcester CDi Combi N.G Service Booklet page 50

RECTIFYING FAULTS
FA
and RESET button and fault indicator LED are flashing.
After appliance switches off flame is detected
Check
1. Is the condensate trap blocked?
2. Electrode assembly defective?
B Switch OFF the appliance.
B Remove electrode assembly.
Electrode assembly burnt out?
3. Problem with flue?
B Check CO level in combustion air
2
in the flue (with outer casing fit-
ted).
Is CO level above 0.2%?
2
4. Is the gas valve damaged?
5. B Switch OFF the appliance.
B Disconnect the boiler power con-
nection.
B Check if the 20-pin connector
lead assembly is damaged.
Tab. 28 FA Error codes
50
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
yes: B Switch OFF the appliance.
B Clean out condensate trap discharge pipe.
B Switch ON the appliance.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
FA? go to 2
no: go to 2
yes: B Replace electrode assembly.
B Switch ON the appliance.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
FA? go to 3
no: go to 3
yes: There are flue gases in the combustion air.
B Check flue, clean if necessary.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
FA? go to 4
no: go to 4
yes: B Switch OFF the appliance.
B Disconnect the boiler power connection.
B Turn off gas valve.
B Change the gas valve.
B Open the gas valve.
B Reconnect the appliance power connection.
B Switch ON the appliance.
B Check appliance for leaks.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
FA? go to 5
no: go to 5
B Change the connector lead assembly.
B Reconnect the appliance power connection.
B Switch ON the appliance.
B Press the reset button for 3 seconds and release it.
After releasing the appliance re-starts.
FA? go to 6
8 716 115 748 (2009/09)