Worcester CDi Combi N.G Service Booklet page 36

RECTIFYING FAULTS
C6
and fault indicator LED are flashing.
Fan speed too low
Check
1. Fan cable connector correctly
connected on fan?
2. Check power supply to appliance,
check supply with all electrical
appliances on. Is the supply voltage
within tolerance (230 V AC ± 10)?
3. Is fan cable defective?
B Switch OFF the appliance.
B Disconnect the boiler power
connection.
B Measure the fan lead for
continuity.
Is there continuity for each one of
the cores?
4. Fan defective.
5. The PCB is damaged.
Tab. 19 C6 Error codes
36
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
yes: go to 2
no: B Switch OFF the appliance.
B Reconnect connector.
B Switch ON the appliance.
C6? go to 2
yes: go to 3
no: B Switch off some electrical appliances.
go to 3
yes: go to 4
no: B Replace fan cable.
B Reconnect the appliance power connection.
B Switch ON the appliance.
C6? go to 4
yes: B Switch OFF the appliance.
B Disconnect the boiler power connection.
B Un-plug the connection wire.
B Replace fan.
B Push on the connection wire.
B Reconnect the appliance power connection.
B Switch ON the appliance.
C6? go to 5
B Make a note of the altered service function settings
(see table 6 on page 18) in order to keep the
altered values.
B Switch OFF the appliance.
B Disconnect the boiler power connection.
B Change PCB control board.
B Reconnect the appliance power connection.
B Switch ON the appliance.
B Restore service settings previously noted down.
8 716 115 748 (2009/09)