Worcester CDi Combi N.G Service Booklet page 35

b1
and fault indicator LED are flashing
Code plug not detected.
Check
1. B Select in the second service level
the service function 8.b (Code
plug).
B Compare number displayed with
that shown in Appendix (only
digits no. 7 up to 10 of order no.).
No number or incorrect number
displayed.
B Exit the service function.
2. Code plug loose, incorrect or
defective.
3. The PCB is damaged.
Tab. 18 b1 Error codes
8 716 115 748 (2009/09)
Supplied By www.heating spares.co Tel. 0161 620 6677
Action
yes: go to 2
no: go to 3
B Switch OFF the appliance.
B Fit code plug (correctly), making sure code number
is correct (see Appendix).
B Switch ON the appliance.
b1? go to 3
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.
RECTIFYING FAULTS
35