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Troubleshooting & Diagnostic:
Air baffle failure indication “d” on the display (*)
(*) Note: After 2006 range, the failure indication on the display will be shown only in the first 10 minutes. To
see the indication again, plug out and plug in the appliances.
Check if the damper is blocked
by ice formation
Clean damper and
air passages from
ice
NoYes
Check the connections to the
damper and feedback signal at
the main board (pin 5/12)
- On old appliances (before 2006): prepare the appliances with the
Service Solution “New air baffle cover kit” as described in the Service
Bulletin 4812 711 40158/2.
- On 2007 and 2008 not Biruni appliances: change the Main Board with a
new one introducing a complete damper sliding door operation (opening-
closing) every 25 minutes, as described in the Service Bulletin 4812 711
40303. Ice formation is avoided by the periodical operations of the air
baffle which are ‘cleaning’ the slide path.
Damper is OK
Damper is defect
Change the damper
Check if damper works
(see also next page)
Connections OK
Visual check of damper
sliding door. Slide is
broken or other defects?
(see also next page)
Change the damper
No
Yes
No
Yes
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