19
Fault Finding & Solution Chart
FAULT
CAUSE
SOLUTION
REMARKS
a) Suction pipe is blocked by
impurities.
a) Check and clean suction
pipe.
b) Foot valve or check valve is
closed.
b) Check and repair foot valve
or check valve.
c) Leakage in suction pipe.
c) Check and repair suction
pipe.
d) There is air in suction pipe
or pump.
d) Refill liquid, release air.
a) Leakage in suction pipe.
a) Check suction pipe.
b) Foot valve or check valve is
defective.
b)Check and repair foot valve
or check valve.
c) Foot valve is blocked in
opened or partly opened
position.
c)Check and repair foot valve.
d) There is air in suction pipe. d) Check and repair suction.
a) Leakage in suction pipe.
a) Check and repair suction
pipe.
b) Suction pipe is too small or
suction pipe is partly blocked
by impurities.
b) Enlarge or check suction
pipe.
c) There is air in suction pipe
or pump.
c) Refill liquid to the pump
and vent air.
d) The comparison of the
delivery head of device with
delivery head of pump is very
Iow.
d) Improve system or choose
another pump model.
e) Pump mechanically
blocked.
e)Check and repair pump.
Abnormal vibration or
noise from pump
In the case of e), users
shall not disassemble the
pump by themselves.
Pump runs backwards
when switched off.
Pump runs but gives
no water.
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