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Faults, causes and remedies
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When assembled, the rotor's magnetic field is guided in the motor's iron core. How-
ever, there is no magnetic field outside the motor that is harmful to health or affects
the motor.
DANGER
Risk of fatal electrical shock!
Even without the module (without electrical connection), there may be dangerous
contact voltage at the motor contacts.
It is not permissible to dismantle the module!
10
Faults, causes and remedies
10.1
Troubleshooting
Troubleshooting must only be carried out by a qualified installer, and work on the
electrical connection must only be carried out by a qualified electrician.
Faults
Pump is not running with
switched-on power supply.
Pump is not running with
switched-on power supply.
Pump makes noises.
Pump makes noises.
Building does not get warm.
Building does not get warm.
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erty may be the result. For such persons, a professional medical assessment is
always necessary!
There is a crushing hazard! When removing the motor impeller unit from the mo-
tor, it can suddenly be pulled back into its original position by the strong mag-
netic field!
If the motor impeller unit is outside the motor, magnetic objects may be sud-
denly attracted. This may cause bodily injury and material damage!
Electronic devices can be impaired or damaged by the strong magnetic field of
the rotor!
Causes
Fuse protection defect.
Pump has no voltage.
Cavitation due to insufficient
suction pressure.
Cavitation due to insufficient
suction pressure.
Heat output of the heating sur-
faces too low.
Heat output of the heating sur-
faces too low.
Remedies
Check the fuse protection.
Reconnect the voltage.
Increase the system pressure
within the permissible range.
Check the delivery head setting
and set it to a lower head if ne-
cessary.
Increase setpoint.
Change the control mode from
Δp-v to Δp-c.
WILO SE 2022-04
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