The pump won’t
start and makes no
noise
1. No electricity
2. Fuses or RCD tripped
3. Internal motor fault
4. The static head pressure is greater than the
cut in setting (applies when commissioning)
5. Controller has sensed dry run and is its auto
restart cycle (Failure light slowly flashing)
1. Check the power supply. Is the power LED on the
controller illuminated?
2. Fuses or RCD tripped may indicate more serious
problems
3. Contact an expert to check the motor
4. Static water head above the controller must be
less than cut in pressure
5. Press the controller reset button
The pump doesn’t
start but makes a
noise
1. Motor not free to turn i.e. internal jamming
2. Faulty capacitor
1. Check whether pump can rotate freely
2. Contact an expert to check/replace capacitor
The pump runs but
there is no flow or
only poor flow
1. Valves closed
2. Air entering suction line (loss of prime)
3. The water lavel may be too low
4. Pump may be worn or damaged
5. Blockages in the pump, suction or
discharge
6. In-line filters blocked (if fitted)
7. The piping may be too long or too small
1. Check suction and discharge isolating valves
2. Check for leaks and ensure all joins or fittings are
sealed
3. Check water availability
4. Contact your service agent for repair
5. Contact your service agent for repair
6. Clean any filters/strainers in the system
7. Contact your pump professional
The pump runs.
There is flow but
poor pressure
1. Excessive flow demand
2. Total head requirement too great for the
pump
3. Pump may be worn or damaged
4. Air entering suction line reducing
performance
1. Check that the pump selected is correct for the
application
2. Check the pump specification
3. Contact your service agent
4. Ensure the suction line is sealed correctly
1. Small water draw off or leak
2. Leak in suction or discharge line
3. Contamination in the controller
1. Check for small leaks i.e. taps or cistern
2. Check for leaks including suction line non return
valve
3. Contact your service agent to inspect
1. Overheating and thermal protection tripping
1. Ensure the water temp is less than 40 deg C.
Ensure sufficient airflow to cool the motor.
Note that low voltage can cause the motor to
overheat.
Pump vibrates and
is noisy
1. Incorrectly mounted/fixed
2. Internal blockage causing impeller
imbalance
3. If the flow requirement is greater than the
pump is capable of it will cavitate.
Cavitation sounds like gravel inside pump.
1. Ensure the pump is solidly attached to a base
2. Contact your service agent
3. Reduce the water demand to see if the noise
disappears.
Ensure the suction pipe is sized correctly
A different pump model may be required
Contact your service agent
Water leaking from
the centre of the
pump
1. The mechanical seal is leaking
1. Contact your service agent for repair
