Caution: Before removing the terminal box cover and before any removal/dismantling of the pump, make
sure that the power supply has been switched off.
18
Fault Finding & Solution Chart
FAULT
CAUSE
SOLUTION
REMARKS
a) Power supply failure.
a)Check power supply.
b) Fuses are blown.
b) Replace fuses.
c) Motor is overloaded.
c) Check system.
d) Main contacts of starter are
not connected well or the coil
is defective.
d) Replace motor starter.
e) Control circuit is defective. e) Check control circuit.
f) Motor is defective.
f) Repair.
a) Fuses are blown.
a) Replace fuses.
b) Contacts of overload device
are faulty.
b) Check motor starter.
c) Cable connection is loose
or faulty.
c) Check cables and power
supply.
d) Motor winding is defective. d) Replace motor.
e) Pump mechanicably
blocked.
e) Check and repair pump.
a)The setting of overboad is
too low.
a) Reset overload setting.
b) Periodic power supply
faults.
b) Check power supply.
c) Low voltage at peak times. c) Add regulator.
a) Contacts of starter are not
contacted welI or the coil is
faulty.
a) Change motor starter.
b) Control circuit are
defective
b) Check control circuit.
a) Suction pipe is too small.
a) Enlarge inlet pipeline.
b) There is not sufficient water
in pump water inlet.
b) Improve system and
increase coming water.
c) Liquid Ievel is Iow.
c) Try to lift liquid level.
d) Pump inlet pressure is too
low compared with water
temperature, pipeline Ioss
and flow.
d) Improve system and try to
increase the inlet pressure.
e) Suction pipe is partly
blocked by impurities.
e) Check and clear impurities.
In the case of d) and e),
users shall not
disassemble the pump
by themselves.
Motor does not run
when started.
Overload device of
motor starter trips out
immediately when
power supply is
switched on.
Overload device trips
out occasionally.
Motor starter has not
tripped out but the
pump does not run.
Pumped water does
not flow constantly.
Table 5
barmesapumps.com
