1.
Remove lid
A
and flip up control
unit cover
B
.
2.
Undo screws and remove lid
C
.
3.
Undo screw and flip up control unit
top
D
.
4.
If required, clean the PCB with
compressed air or a vacuum clea-
ner.
5.
Check the electrical plug-in con-
nections for tight fit.
6.
Check the routing of electrical
cables/leads. These must neither
touch hot components (e.g. fan
box) nor be squashed in.
7.
Close control unit again.
8. Boiler control
17
Inspection and maintenance
5692
618
GB
Содержание Vitolig 300
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