5 Operating and display functions
34 Operating instructions VRT 350f 0020131979_00
5.5 Messages
5.5.1 Service message
If a service is required, the controller displays a service
message in the display.
Caution.
Risk of damage to the heating installa-
tion due to failure to perform mainten-
ance work.
A service message indicates that the heat-
ing installation must be serviced by the
skilled tradesman. Failure to observe these
service messages could lead to material
damage or failure of the heating installa-
tion.
▶ If the controller displays a service mes-
sage, inform a skilled tradesman.
The following service messages may appear:
– Service heat generator 1
– Service (of the heating installation)
5.5.2 Fault message
If a fault occurs in the heating installation, the controller
displays a fault message in the display.
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