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Troubleshooting
Faults
Causes
Mains voltage is not applied
Pump does
not start
Float switch (5) does not switch
Pump pedestal inlet grating
blocked
Reduces pump performance,
through severely contaminated
Pumps has
water and additions in the water
no discharge
which produce a grinding effect
Backfl ow stop (10) is incorrectly
fi tted or faulty
Pump does
Float switch cannot drop
not switch off
Pump pedestal inlet grating
blocked
Reduces pump performance,
through severely contaminated
water and additions in the water
Flow rate
which produce a grinding effect
insuffi cient
Backfl ow stop (10) is incorrectly
fi tted or faulty
Backfl ow stop (10) reduces pump
performance
Motor contactor disconnects the
pumps because of water pollution
Pump switch-
that is too severe
es off after a
short period
Water temperature too high, motor
contactor breaks
Remedies
Check plug socket, cable, line and
plug, where appropriate, have re-
paired through electrical specialist
Bring fl oat switch into higher posi-
tion
Use a water jet to clean the pump
pedestal inlet grating (see "General
cleaning instructions")
Clean pump
Check the backfl ow stop's connec-
tion. Change it if necessary (see
"Maintenance and Cleaning")
Set up pumps correctly on the pit
base
Use a water jet to clean the pump
pedestal inlet grating (see "General
cleaning instructions")
Clean pump
Check the backfl ow stop's connec-
tion. Change it if necessary (see
"Maintenance and Cleaning")
Remove the backfl ow stop from the
angle adaptor (11) (see "Start-up")
Pull out power plug and clean the
pump as well as shaft
Note maximum water temperature
of 35°C!
GB
MT
31
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