75
Possible reason - On old appliances
with ITW electronics:
The capacitors in the Main Board are
loosing capacity.
- For appliances produced before week 30/2004, it is
necessary to change both electronics Main Board and
User Interface Board.
- For appliances produced after week 30/2004, you have
to change only the Main Board.
Follow the instruction in
Service Bulletin
4812 711 40179/2.
Possible reason - On old no dispenser
appliances with ITW electronics:
Possible some electronic bugs in the User
Interface and the Main Board.
Follow the instruction in
Service Bulletin
4812 711 40240.
Troubleshooting & Diagnostic:
User Interface black out.
User Interface automatic stand-by
or automatic change of temperature set-up
On Biruni appliances:
See the ‘2008 Biruni
appliances’ chapter.