Fault
Cause
Remedy
Insufficient flow or
pressure
1. Wrong pump selection
2. Overlong inlet pipeline, over-
high head or serious bending of
the pipeline
3. Insufficient water source
4. There are foreign matters
blocking the inlet pipeline, filter
screen or foot valve
5. Serious wearing of the
impeller
1. Select correct pump
2. Shorten the pipeline, use it within the
head application range or make pipeline
bend gently
3. Check the water source
4. Wash and clean the pipeline, filter
screen or bottom valve and clear the
blocking debris
5. Replace the impeller
The motor runs
but no water is
discharged
1. There is air leakage at the
water inlet pipeline
2. There is air retained in the
pump cavity
3. Air enters in through the
sealing elements
4. The water level of the well is
too low
5. The foot valve is not opened or
seriously blocked; the pipeline
resistance is great; the suction
height is too high
1. Check whether the water inlet
pipelines and joints are sealed well and
confirm that the seal is reliable
2. Refill water into the pump body and
discharge the air
3. Adjust or replace the sealing elements
with new ones
4. Adjust the installation height of the
water pump
5. Check the flexibility of the foot valve,
remove the stopper, try to shorten the
water inlet pipeline and reduce the
suction height
The motor does
not work
1. The protector is disconnected
or the fuse is burned out
2. The impeller is stuck
3. The stator winding is burned
out
4. The voltage is too low
5. The cable is broken
1. Check whether the using head or
supply voltage meet the specifications.
The motor does not work when it is
overheated, if it does not work when it is
cooled down, please contact the local
retailer
2. Clear the debris
3. Reinsert and rewind the coils and
conduct an overhaul
4. Ask the electric power company to
solve or add the voltage regulator
5. Replace the cable
The stator
winding is burned
out
1. The supply voltage is too low
2. Water enters in the motor,
which causes short circuit of the
coil
3. The impeller is stuck
4. The electric pump is started
too frequently
5. Over-load operation of the
electric pump
6. Default phase of the three-
phase electric pump
Clear the trouble, disassemble the
winding, reinsert and rewind the coil as
per the original technical requirements
and soak and dry the insulation varnish
or send it to the maintenance unit for
repair
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