Service And Troubleshooting 6; Cleaning The Controller; Detecting And Rectifying Faults - Vaillant VRT 350f Operating Instructions Manual

Caution.
Risk of damage to the heating in-
stallation due to failure to perform
troubleshooting work.
A fault message indicates that the skilled
tradesman must perform troubleshooting
or repair work on the heating installation.
Failure to observe these fault messages
could lead to material damage or failure of
the heating installation.
▶ If the controller displays a fault message,
inform a skilled tradesman.
!
Heat Generator 1 fault
Back
If the controller shows a fault message in the display in-
stead of the basic display and you press the left-hand se-
lection button Back then the basic display appears again.
You can also read current fault messages under Menu →
Information → System status → Status. As soon as a fault
0020131979_00 VRT 350f Operating instructions

Service and troubleshooting 6

message for the heating installation appears, the Status
setting level will display Fault. In this case, the right-hand
function key has the function Display.
6 Service and troubleshooting
6.1

Cleaning the controller

1. Clean the casing of the controller with a damp cloth.
2. Never use scouring or cleaning agents which could dam-
age the operator control elements or the display.
6.2

Detecting and rectifying faults

Fault Cause
Change batteries Battery in radio
controller almost
out of power
Display is dark Battery is empty
Remedy
Replace the batter-
ies.
Replace the batter-
ies.
35