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Idiomas disponibles
65
Fault
Pump does not run
Short-circuit
when switching on pump
lights
flashing
Noises from pump
Radiators do not heat up
english
8. Summary of malfunctions
Switch off all poles of the supply voltage without fail
before removing the terminal box cover and always
before dismantling the pump.
The electronics can still be live for up to 10 minutes
after switching off the power supply!
Cause
No motor voltage
Mains voltage too low
Pump blocked
Electronics wrongly
connected
Motor defective
Fault in electronics
Motor blocked
Air in pump
Cavitation
Pump too powerful
Pump too weak
Air in pump
Subject to technical modifications
Remedy
Check switch and fuses,
check supply voltage
Check control and mains
Deblock, see
Connect correctly
Change pump
Exchange electronics,
possibly check external drive (Ext.)!
Check whether auxiliary module
fitted!
Switch pump ON/OFF several
times.
Disassemble motor for de-blocking:
– Close slide valve before
and after pump
– Dismantle motor; release
4 socket-head screws.
Warning:
hot water can run out.
– Remove motor
– Turn impeller until shaft turns
easily.
– Fit motor and open slide valve.
Vent system several times
with pump switched off.
Pump vented automatically
see sections 6.2
Increase system pressure/
reduce temperature
see section 10
Set lower characteristic
see section 5.4/smaller pump
Set higher characteristic,
see section 5.4
fit more powerful pump
Vent system with pump off
see section 6.2
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