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10 Checking the direction of rotation
Methods of checking the correct rotation of the pump
1. The motor must rotate in the direction of the arrow
2. Can also be determined by pressure or flow. The correct direction of rotation has higher water flow
parameters.
Testing the correct direction of rotation can only be carried out for a maximum of 2-3 seconds in dry conditions,
otherwise there is a risk of damage to the motor.
To change the direction of rotation of the pump motor, swap the 2 phases on the supply line between each other at
the point of connection of the pump to the electrical installation.
11 Troubleshooting
Examples of problems and solutions
The pump is running
but not delivering any
water.
If possible, lower the pump into the borehole (well) or
deepen it. Do not run the pump dry.
Damaged pump rubber liner
Send the pump to a service centre
Wrong direction of motor rotation
Remove the pump from the power supply and clean it
Water leakage from the pipe
Repair pipe joint seals, replace leaking pipes
Heavy wear and tear on the functional parts of the
pump
Send the pump to the service centre
Electrical network is without voltage
Contact the electricity provider
Fault in mains power supply
Inspect and repair by an authorised person
Fault on the electric motor
Send the pump to the service centre
Pump rotor has stuck (this fault is only possible in the
case of first start-up or after a significant break in
operation)
Insert a suitable solid object (flat or square) into the
rotor cavity of the pump when disconnected from the
power supply and twist about 5 times to the left, then
remove the object
The pump is clogged with deposits from the water and
the discharge pipe
Remove debris and allow the rotor to spin freely in
the pump liner
The pump is noisy
and has high current
consumption
Some phases of the stator winding of the motor are
shortened or interrupted
Send the pump to a service centre. Measure the
voltage of all phases
Winding insulation is damaged and fault current is
passing through the protection circuit
Bearings are worn or damaged
Send the pump to the service centre
Pump or motor tightening screws are loose
Send the pump to the service centre
Loss of power to one phase of the mains supply
Measure the presence of voltage on all 3 supply
phases by a qualified person
As Pumpa company is constantly improving its products, we reserve the right to change the technical specifications of
products without prior notice and without subsequent liability.
During the warranty period, disassembly and replacement of parts can only be performed by a Pumpa, a.s. service
centre.
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