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Faults - Causes - Remedies
Faults
Pump does not start
Pumps has no dis-
charge
Pump does not switch
off
Flow rate insufficient
Pump switches off
after a short period
40
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Causes
- Mains voltage is not applied
- Float switch (
switch
- Base (
4) inlet grating
blocked
- Reduces pump performance,
through severely contami-
nated water and additions in
the water which produce a
grinding effect
- Backflow stop (
incorrectly fitted or faulty
- Float switch cannot drop
- Base (
4) inlet grating
blocked
- Reduces pump performance,
through severely contami-
nated water and additions in
the water which produce a
grinding effect
- Backflow stop (
incorrectly fitted or faulty
- Backflow stop (
duces pump performance
- Motor contactor disconnects
the pumps because of water
pollution that is too severe.
- Water temperature too high,
motor contactor breaks
Remedies
- Check mains voltage
6) does not
- Bring float switch into higher
position
- Use a water jet to clean the
base inlet grating
- Clean pumps and replace
sealing ring (
essary
10) is
- Check the backflow stop's
connection. Change it if
necessary (see "Maintenance
and Cleaning")
- Set up pumps correctly on the
pit base
- Use a water jet to clean the
base inlet grating
- Clean pumps and replace
sealing ring (
essary
10) is
- Check the backflow stop's
connection. Change it if
necessary (see "Maintenance
and Cleaning")
10) re-
- Remove the backflow stop
from the angle adapter (
11) (see "Start-up")
- Pull out power plug and
clean the pump as well as
shaft
- Note maximum water tem-
perature of 35°C!
13) as nec-
13) as nec-
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