13
Troubleshooting guide
Fault
Cause
Remedy
Drain valve (FrostControl) is
opening.
– Temperature at drain valve
below approx. 3 °C. (the drain valve
opens automatically at temperatures
below approx. 3 °C!)
– Switch on vehicle heater if necessary.
At temperatures above approx. 7 °C at the
drain valve, it can be closed again.
The drain valve (FrostControl) can
no longer be closed.
– Temperature at drain valve is
below approx. 7 °C.
– Rotary switch not set to
“Operation”.
– 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.
Water flows intermittently from
the FrostControl discharge nozzle.
– Water pressure too high.
– 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.
If these actions do not remedy the problem, please contact Truma Service.
