Technical data

7 181 465 346 GB (03.02)
37
Failure identification procedure
F0 (and possibly ) flashing.
Internal failure
Check Action
B Note the setting of the temperature controls
and .
1.
B Press buttons and simulta-
neously.
B Select service function 9.3 .
A service code is displayed.
B Enter figure displayed in customer service record.
↓2.
2. B Select service function 5.2 .
A service code is displayed.
B Enter figure displayed in customer service record.
↓3.
3.
flashing?
yes:
B Press button .
B Initiate demand for heat by pressing button
and then press again after 30 seconds to cancel.
B Initiate two more demands for heat as above.
F0? ↓4.
no: ↓4.
4. The PCB control board is damaged. B Make a note of the altered service settings (see
table 1, "First Service Level; Values that can be
modified" at page 8 and table 5, "Secondary
Service Level; Values that can be modified" at
page 11).
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.
B Restore service settings previously noted down.
To return to normal function mode:
B Press buttons and simultaneously.
B Regulate the temperature control and the
temperature control on the previously set
positions.