9. TROUBLE SHOOTING
SYMPTOM
POSSIBLE CAUSE
1.ELECTRICAL
2.MECHANICAL
3.INSTALLATION
1
2
3
4
1
2
3
4
1
2
3
4
5
6
7
8
9
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
PUMP WORKS BUT DOES
NOT PUMP OUT WATER
THE PUMP DOES NOT
PUMP OUT ENOUGH
WATER
INSUFFICIENT
PRESSURE
EXCESSIVE
VIBRATIONS
ABNORMAL NOISE
THE PUMP STOPS
OVERHEATING
CAUSE
POSSIBLE ORIGIN
1.ELECTRICAL
The installation has no
power.
There is not power
on a phase.
Check each phase at the input to the control panel.
Check the protection devices.
Check each phase at the input to the control panel.
Check that the protection devices are in good condition.
The voltage on the motor terminals should be within ± 10% of the nominal
voltage stated on the motor rating plate.
Check the terminal connection diagram.
Check the control device on the pump for a malfunction.
Check for a mechanical obstruction or an overload.
Check that the motor windings are correctly earthed.
User a resistance meter to do so.
Check each winding with a resistance meter.
Check the frequency of the mains power supply.
The variation must be less than 5% of the frequency indicated on the motor.
Change the rotation direction on three-phase motors by swapping
two of the motor's power supply cables.
Low motor voltage.
Incorrect motor connection.
Control fault.
Activation of thermal
protection device.
Insulation fault.
Open windings.
Frequency variation.
Wrong rotation direction.
1.1
1.2
1.3
1.4
1.5
1.6
1.7
1.8
1.9
1.10
10
x
x
x
x
x
31
