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17. Troubleshooting guide
Motor not running
Cause
Remedy
- Power supply not connected
- Impeller blocked, thermostat has swit-
ched off
- Check voltage supply
- Take pump apart and clean it
Pump not priming
Cause
Remedy
- Intake valve not in the water
- No water in the pump chamber
- Air in the intake line
- Intake valve leaking
- Intake cage (intake valve) blocked
- Max. intake height exceeded
- Place intake valve in water
- Fill pump housing with water
- Check sealing of intake line
- Clean intake valve
- Clean intake cage
- Check intake height
Insufficient pumping rate
Cause
Remedy
- Intake height too high
- Intake cage soiled
- Water level falling rapidly
- Pump performance reduced by foreign
bodies (sand, stones, etc.)
- Check intake height
- Clean intake cage
- Place intake valve lower down
- Clean pump and replace wearing parts
Thermostat switches off the pump
Cause
Remedy
- Motor overloaded, excessive friction
caused by foreign bodies
- Dismantle and clean pump, prevent in-
take of foreign bodies (filter)
Caution! The pump must not run dry.
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