Equipment details
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Green and red LEDs blink after heater is
switched off.
- Unit was switched off during failure.
After-running is active in order to
reduce the unit’s temperature.
- After-running will switch off after a few minutes. Only at
that time will a failure reset be possible (switch off and
then back on).
Green LED blinks after heater is
switched off.
- After-running is active in order to
reduce the unit’s temperature.
- No failure. After-running will switch off after
approximately 5 minutes.
When the device is switched on in
electrical operation the red LED on the
control panel flashes, the yellow LED
on the power selector switch does not
illuminate and the heater does not
heat up.
- No 230 V operating voltage.
- 230 V fuse defective.
- Overheating protection has activated.
- Check 230 V operating voltage.
- Check 230 V fuse and replace if necessary.
- Reset overheating protection. Allow heater to cool,
remove connection cover and press reset button.
Water Supply
After the heater is switched off, the drain
valve opens (FrostControl).
- Temperature at drain valve is below 3°C - Switch the heater on. If the temperature is below
approximately 3°C, the drain valve will open
automatically! If the heater is not in operation, the drain
valve can be reclosed only when the temperature is
approximately 7ºC or higher!
- Use heating element for FrostControl.
The drain valve (FrostControl) can no
longer be closed.
- Temperature at drain valve is below
approximately 7° C.
- Rotary switch is not at ‘Operation’.
- Switch the heater on. If the heater is not in operation, the
drain valve can be reclosed only when the temperature is
approximately 7°C or higher!
- 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 too high. - Check pump pressure (max. 2.8 bar). If 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 entering the boiler.
If these measures do not remove the failure, please contact the Truma Service Centre.