6
Thermann Owner's Guide
Heat Pump Water Heaters
TROUBLESHOOTING
No Hot Water
Should you fail to obtain hot water at any time, you can take the following steps to remedy that situation:
No Electrical Power
Check the fuse/circuit breaker in your fuse box. If it has blown/tripped, replace/reset the fuse/MCB. If it should
blow/trigger repeatedly, notify your local tradesperson.
Still No Hot Water, Even Though Power Is Available
Check, whether the air inlet/outlet is blocked.
The thermoswitch trips out or the high limit safety pressure limiter switches the compressor OFF if the compressor
is overloaded due to excessive ambient temperature or excessive air temperature (>42 ¡C), or because of a fault in
the refrigerant circuit. If this happens repeatedly, ask your local tradesperson to remove the fault.
After a short cooldown phase, the thermoswitch will restart the compressor automatically.
Material Losses
The high limit safety pressure limiter must only be reset by your licensed tradesperson after they have re-
moved the cause of the relevant fault.
Other Issues
Safety Valve Of The Cold Water Supply Line Drips
This may occur during the heat-up phase and is completely normal.
The Condensate Drain Drips
This always happens when the surface temperature of the evaporator is lower than the ambient dew point
temperature.
Notifying A Licensed Tradesperson
If you cannot remedy the fault, notify your licensed tradesperson. To facilitate and speed up your request, provide
the serial number from the type plate (000000-0000-000000).
Sample Type Plate
000000-0000-000000
D0000053676
1
1. Number on the type plate
!
