Code Plug Not Detected - Worcester ZSBR 7-28 ICS1 Service Booklet

Rectifying faults
b1
flashing.

Code plug not detected.

Check
1. No fault or fault code FC displayed
on text display?
B Activate menu option Show serv-
2.
ice parameters.
B Select 1.2 Code plug.
B Compare number displayed with
that shown in Appendix.
No number or incorrect number
(last three digits) displayed.
3. Code plug loose, incorrect or defec-
tive.
4. The PCB control board is damaged.
1) For order no., refer to Appendix
22
Action
B Power OFF the appliance.
yes:
B Fit code plug (correctly), making sure code
number (see Appendix) is correct.
B Turn ON the appliance.
b1? ↓2.
↓2.
no:
↓2.
yes:
↓4.
no:
B Power OFF the appliance.
B Replace code plug
is correct.
B Turn ON the appliance.
b1? ↓4.
B Power OFF the appliance.
B Disconnect the boiler electrical connection.
B Change PCB control board.
B Reconnect the boiler electrical connection.
B Turn ON the appliance.
1)
, making sure code number
7 181 465 347 (01.07)