Troubleshooting; Detecting And Rectifying Faults - Vaillant VRT 350f Installation Instructions Manual

▶
If the control displays a fault message,
inform a competent person.
!
Heat generator 1 fault
Back
If the controller shows a fault message in the display instead
of the basic display and you press the left-hand selection
button Back then the basic display appears again.
You can also read current fault messages under Menu → In-
formation → System status → Status. As soon as a fault
message for the heating installation appears, the Status set-
ting level will display Fault. In this case, the right-hand func-
tion key has the function Display.
26
6

Troubleshooting

6.1

Detecting and rectifying faults

Fault Cause
Change batteries Battery in radio
controller almost
out of power
Display is dark Battery is empty
Display is dark Appliance fault
No changes in
the display via the
rotary knob
No changes in the
display via the se-
lection buttons
Operating instructions 0020131979_01
Remedy
Replace the batter-
ies.
Replace the batter-
ies.
–
Switch off the
mains switch
on the heat
generator for
approx. 1
minute and
then switch it
on again
–
If the fault is
still present, in-
form the com-
petent person