Internal Failure - Worcester ZSBR 7-28 ICS1 Service Booklet

Rectifying faults
F 0
(and possibly

Internal failure

Check
B Activate menu option
1.
Show service parameters.
B Select 9.3 GFA-Asic-error.
A message is displayed.
B Select 5.2 GFA status / error.
2.
A message is displayed.
B Select Settings -> Service ->
3.
Further options -> Fault history.
Other faults apart from F0 dis-
played?
4. flashing?
5. The PCB control board is damaged.
32
) flashing.
Action
B Record figure displayed in service report.
↓2.
B Record figure displayed in service report.
B Deal with fault(s) displayed as instructed in rele-
yes:
vant fault table(s) .
↓3.
no:
B Press button
yes:
B Initiate demand for heat by pressing the
ton and then cancel after 30 seconds by pressing
the button again.
B Initiate demand for heat twice more as described
above.
F0? ↓4.
↓4.
no:
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.
.
7 181 465 347 (01.07)
. but-