Vaillant VRT 350f - Changing Batteries

6 Service and troubleshooting
36 Operating instructions VRT 350f 0020131979_00
Fault Cause Remedy
Display is dark Appliance fault – Switch off the
mains switch on
the heat gener-
ator for approx.
1 minute and
then switch it
on again
– If the fault is
still present,
inform the com-
petent person
No changes in the
display via the
rotary knob
No changes in the
display via the
selection buttons
6.3 Changing batteries
1
2
1 Control 2 Wall-mounting base
1. Pull the controller (1) upwards and off the wall-mounting
base (2).