7
ELECTRICAL CONNECTION
Check that the details on the pump data plate match with the mains voltage and frequency.
The electrical installation must be carried out by a qualified electrician !
Local installation regulations must be followed !
Make sure that the pump is properly earthed. The earth conductor must be slightly longer than the phase conductors. If
the motor power cable is accidentally pulled off, the earth conductor must be the last conductor to be removed from the
terminals.
Never lift the pump by its power cable !
Pumps must be connected to an approved motor protection.
BUILT-IN MOTOR PROTECTION
Check that the pump is disconnected from the power supply before starting any work !
The pump's built-in motor protection switches off the contactor automatically if the motor overheats. Then, the fault
must be identified and corrected. After cooling to normal working temperature, the motor protection switches on the
contactor and the pump starts again.
TROUBLE SHOOTING
Fault location
Cause
Action
Pump will not start.
1. Fuses blown
2. Broken cable
3. Power failure
4. Jammed impeller
5. Faulty contactor
6. Stator winding burnt-out
7. Incorrect phase sequence (3 phases)
1. Replace fuses
2. Service
3. –
4. Clean bottom of pump
5. Service
6. Service
7. Change 2 phases in plug
Pump starts, but stops again.
1. Pump runs backwards (3 phases)
2. Pump connected to wrong voltage
3. Phase interruption
4. Strainer blocked
5. Insufficient water level
6. Voltage too low when using an extra cable
7. Water too hot
1. Change 2 phases in plug
2. Select the right voltage
3. Check fuses
4. Clean strainer
5. Stop the pump
6. Increase the extra cable section
7. Switch off power
Pump works, but delivers too
small water volume .
1. Impeller worn
2. Pump runs backwards (3 phases)
3. Hose dimensions unsuitable
4. Insufficient discharge head
1. Adjust pump/replace impeller
2. Change 2 phases in plug
3. Change to suitable hose
4. Select a bigger pump
Neutral
