EN
6
8. FAULT FINDING CHART
Before attempting to diagnose any fault, make sure that the electricity supply
has been switched off.
FAULT
CAUSE
Motor does not start.
- No electricity supply.
- Motor switched off by level switch.
- Fuses are blown.
- Impeller blocked by impurities.
- Short-circuit in cable or motor.
Pump runs but gives no water.
- Pump blocked by impurities.
- Discharge pipe blocked by
impurities.
- Liquid level too low. The pump inlet
is not completely submerged in the
pumped liquid.
Pump runs constantly or gives
insufficient water.
- Pump partly blocked by impurities.
- Discharge pipe partly blocked by
impurities.
- Incorrect direction of rotation.
- Pump too small for the application.
Thermal relay trips out after short
time of operation.
- Temperature of pumped liquid too
high.
- Impeller blocked or partly blocked
by impurities.
- Phase failure.
- Voltage too low.
If in spite of carryng out the above operations, the problem still persists contact the
nearest service centre.
