Troubleshooting
The heater does not respond:
- Mains connection interrupted
- Internal fuse has tripped, due to overheating caused by air
in the system.
The heater only responds briefly:
- Pump overloaded, circulation obstructed, heater controller
closed, pump height exceeded, coolant not circulated or not
circulated sufficiently
- Air in heater, thermoswitch interrupts power supply
Pump does not respond, but the unit becomes hot:
- Pump is blocked, contaminated or over-aged coolant, de-
posits on pump rotor. To reduce deposits, the heater should
be switched on at least 2 to 3 times a month.
Ground fault circuit interrupter switch has tripped:
- Internal fuse has tripped
- Moisture in the connection plug, possibly hose connec-
tions / seal leaking
Maintenance and care
Always disconnect the preheater from the power supply
before cleaning it.
Externally, the preheater should only be cleaned with a
damp cloth or sponge. Never use aggressive cleaning agents
or chemical solutions, as this could damage the surface of
the housing.
Disposal
Dispose of the product at the end of its service life in accor-
dance with the applicable legal regulations.
