GB
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10. Troubleshooting guide
Faults Cause Remedy
Motor fails to start
up
- No mains voltage
- Pump rotor blocked -thermostat
switched off
- Check voltage
- Dismantle and clean pump
No intake - Non-return valve dirty
- Pump chamber without water con-
nection
- Air in intake line air-tight
- Max. suction height exceeded
- clean
- Fill water into intake
- Make sure intake line is close
- Check suction height
Inadequate delivery
rate
- Suction height too high
- Coarse fi lter dirty
- Water level falling rapidly
- Pump performance diminishedby
contaminants part
- Check suction height
- clean
- Place the suction hose at a deeper
level
- Clean pump and replace wearing
Thermostat swit-
ches pump off
- Motor overloaded - friction caused
by foreign substances too high
- Dismantle and clean pump. Prevent
intake of foreign substances (fi lter)
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