Operating Instructions and Installation Instructions

13
Trouble-shooting list
Fault Cause Rectification
The drain valve (FrostControl)
opens.
Temperature at drain valve less
than approx. 3 °C. (If the tem-
perature is below approximately
3 °C, the drain valve will open
automatically!)
– If necessary, switch on the vehicle heating unit.
It can be closed again at temperatures above
approx. 7 °C on the drain valve!
–
The drain valve (FrostControl)
can no longer be closed.
Temperature at drain valve is below
approximately 7 °C.
Rotary switch is not at “Operation”.
–
–
If necessary, switch on the vehicle heating unit.
It can be closed again at temperatures above
approx. 7 °C on the drain valve!
Turn the drain valve’s rotary switch to “Operation”,
then press the push button until it engages.
–
–
Water flows intermittently from
the FrostControl drain muff.
Water pressure is too high.– Check pump pressure (max. 2.8 bar). If con-
nected to a central water supply (rural or urban
connection), a pressure reducer must be used,
which will prevent pressures higher than 2.8 bar
entering the boiler.
–
If this does not solve the problem, please contact the Truma Service.