25 Error correction
72
99E13331xx-mub-en - V08
2022/07
The display is permanently blank.
Press button C Back
at the same time. Display
lighting switched on?
no
Check the power supply of
the controller.
Is it interrupted?
yes
Controller was in
standby,
everything is ok!
yes
Check the cause and
establish the power
supply again.
no
A technical fault could have
occurred, please
immediately contact a
service team member.