Troubleshooting Guide - Truma FrostControl Mode D'emploi

Troubleshooting guide

Fault
Drain valve (FrostControl) is
opening.
The drain valve (FrostControl) can
no longer be closed.
Water flows intermittently from
the FrostControl discharge nozzle.
If these actions do not remedy the problem, please contact Truma Service.
Cause
– Temperature at drain valve
below approx. 3 °C. (the drain valve
opens automatically at temperatures
below approx. 3 °C!)
– Temperature at drain valve is
below approx. 7 °C.
– Rotary switch not set to
"Operation".
– Water pressure too high.
Remedy
– Switch on vehicle heater if necessary.
At temperatures above approx. 7 °C at the
drain valve, it can be closed again.
– Switch on vehicle heater if necessary.
At temperatures above approx. 7 °C at the
drain valve, it can be closed again.
– Turn the drain valve's rotary switch to
"Operation", then press the pushbutton until
it engages.
– Check pump pressure (max. 2.8 bar). If the
boiler is connected to a central water supply
(rural or urban connection), a pressure reducer
must be used, which will prevent pressures
higher than 2.8 bar from occurring.
13