Notes:
1. All the diagrams in this Operating Manual are only for reference and the Electric Pump you purchased and
its accessories may be different from those indicated in this Operating Manual. Your understanding is really
appreciated.
2. The products involved hereinbefore are subject to continuous improvements and changes (including its
appearance and color)without further notice, please in kind prevail.
IX. Troubleshooting
Fault
Cause
Remedy
The motor does
not revolve.
1. The cable of the Electric Pump is
connected badly or broken.
2. The impeller is blocked.
3. The stator winding is burnt.
4. The voltage is low.
5. The voltage of the cable drops too
much.
6. The capacitor is damaged.
1. Inspect the terminal or replace the cable.
2. Correct the blocked part or remove sundries.
3. Re-insert the winding or carry out overhaul.
4. Adjust the supply voltage to a value within the
range of 0.9-1.1 times the rating.
5. Thicken the cable as required.
6. Replace the damaged capacitor with another
The motor
operates but
the water pump
has no water
flow.
1. There is air leakage at the inlet pipe.
2. The bottom valve or check valve is not
opened or is blocked.
3. Air gets in through the seal.
4. The water level is lower than the
suction lift limit of the Electric Pump.
5. The water pump is not filled with
water.
6. The impeller is damaged.
7. There is a high pipe resistance and
an ill-suited pump model selected is not
suitable.
1. Check whether the sealing at the inlet pipe or
any connection is perfect and ensure that the
sealing is reliable.
2. Inspect the flexibility of the bottom valve and
the check valve,
and remove obstacles.
3. Adjust or replace the seal.
4. Check the water level and adjust the
installation height of the Electric Pump.
5. Again fill the pump body with water.
6. Replace the impeller.
7. Reduce the bends of the pipeline and re-select
a model.
The flow is
insufficient.
1. The pipeline is too long or bent too
much,
or the lift is too high.
2. The bottom valve, strainer or impeller
is blocked locally.
3. The impeller is seriously worn.
4. The motor revolves reversely.
5. The water level is low and close to the
suction lift limit of the Electric Pump.
1. Shorten the pipeline, use the Electric Pump
within its range of lift or make the bending of the
pipeline gentle.
2. Clear away sundries.
3. Replace the impeller.
4. Exchange any two phases of the three-phase
power supply.
5. Reduce the installation height of the Electric
Pump.
The Electric
Pump stops
running
suddenly.
1. The protector is disconnected or the
fuse is burnt.
2. The impeller is blocked.
3. The stator winding is burnt out.
1. Inspect whether the lift or supply voltage used
complies with the relevant provisions and make
an adjustment accordingly.
2. Clear away sundries.
3. Re-insert the winding or carry out overhaul.
The stator
winding is burnt.
1. The supply voltage is too low.
2. Water gets into the motor, which leads
to interturn or interphase short circuit.
3. The impeller is blocked.
4. The Electric Pump starts frequently.
5. The Electric Pump works overload
operation.
Do troubleshooting, disassemble the winding
and re-insert the winding as per the concerned
technical requirements as well as immerse and
dry the insulating varnish or deliver the winding
to the repair station for repair.