Faults, Causes And Remedies - Wilo Star-Z 15 Serie Instrucciones De Instalación Y Funcionamiento

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10 Faults, causes and remedies

Fault
Pump will not start
Noisy pump
Fig. 1
If the fault cannot be remedied, please contact your local heating specialist
or Wilo customer services.
8
Cause
Interruption to the power
supply, short circuit.
Fuses faulty
Motor blocked, e.g. by deposits
from the water.
Motor grinds, e.g. due to depos-
its from the water.
Dry running, insufficient water.
Subject to technical alterations!
Remedy
Check the supply voltage
(observe type plate
information).
Check electrical fuses
Disconnect the electrical
connection.
Release the union nut (Fig. 1,
Item 2), remove the motor
and impeller and restore
movement to the impeller by
rotating and flushing out any
dirt.
Refer to "Motor blocked"
above.
Check the shut-off devices,
which must be open fully.
WILO AG 11/2007