Vaillant VR 81 Supplement Manual page 3

The " " symbol appears in the display
Either you are at the heating engineer level or there is a
maintenance request from the heating appliance.
a) The operating level for the heating engineer is
shown in the display.
b
Caution!
Malfunctions due to improper settings.
Only your heating engineer can change the
settings on the heating engineer level.
> Do not change any settings.
> Wait five minutes until the basic display
automatically appears.
b) If the symbol does not go out after five minutes,
there is a maintenance request from the heating
appliance.
> Contact your heating engineer.
The " " symbol is shown in the display
There is a fault in the heating appliance.
> Contact your heating engineer.
Supplement to the operating and installation manual VR 81 0020124743_00
"Err" appears in the display:
Fig. 1.4 Error message
There is an error on the VR 81/2 remote control unit or a
communication error on the eBUS.
> Contact your heating engineer.
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