45
GB
Troubleshooting
Faults
Causes
Remedies
Pump does
not start
Mains voltage is not applied
Check plug socket, cable, line and
plug, where appropriate, have re-
paired through electrical specialist
Float switch (
6) does not switch
Bring float switch into higher position
Pumps has
no discharge
Pump pedestal (
4) inlet grating
blocked
Use a water jet to clean the pump
pedestal inlet grating
Reduces pump performance,
through severely contaminated
water and additions in the water
which produce a grinding effect
Clean pump
Backflow stop
(
11) is incorrectly
fitted or faulty
Check the backflow stop’s connec
-
tion. Change it if necessary (see
“Maintenance and Cleaning”)
Pump does
not switch off Float switch cannot drop
Set up pumps correctly on the pit
base
Flow rate
insufficient
Pump pedestal (
4) inlet grating
blocked
Use a water jet to clean the pump
pedestal inlet grating
Reduces pump performance,
through severely contaminated
water and additions in the water
which produce a grinding effect
Clean pump
Backflow stop
(
11) is incorrectly
fitted or faulty
Check the backflow stop’s connec
-
tion. Change it if necessary (see
“Maintenance and Cleaning”)
Backflow stop
(
11) reduces
pump performance
Remove the backflow stop from the
angle adaptor (
12) (see “Start-
up”)
Pump switch-
es off after a
short period
Motor contactor disconnects the
pumps because of water pollution
that is too severe
Pull out power plug and clean the
pump as well as shaft
Water temperature too high, motor
contactor breaks
Note maximum water temperature
of 35°C!
