Vaillant VR 81, Инструкция к добавке

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Status and error messages 5
5 Status and error messages
The symbol is shown in the display
a) An appliance requires maintenance.
Contact your expert technician.
b) The display shows the expert technician operation
level.
a
Attention!
Never change the settings. This could impair the
function of your heating system.
h Note
The display changes to the basic display
automatically after five minutes.
The symbol is shown in the display
The appliance has developed a fault.
Contact your heating engineer.
"Err" appears in the display :
Fig. 5.1 Error message
The VR 81 remote control unit has developed a fault or a
communication error has occurred on the eBUS.
Contact your heating engineer.
13 Operating manual VR 81 0020044392_00 VR 81 0020044392_00