12
Troubleshooting Chart
Risk of electric shock. Always disconnect the pump from the power source before handling inspections or repairs.
NOTE:
Barmesa Pumps assumes no responsibility for damage or injury due to disassembly in the field. Disassembly of the pumps or supplied accessories other
than at Barmesa Pumps or its authorized service centers, automatically voids warranty.
Symptom
Possible Cause(s)
Corrective Action
Does not start. Starts,
but imediately stops.
(1) Power failure
(2) Large discrepancy between power
source and voltage
(3) Significant drop in voltage
(4) Motor phase malfunction
(5) Electric circuit connection faulty
(6) Faulty connection of control circuit
(7) Fuses is blown
(8) Faulty magnetic switch
(9) Water is not at level indicated by float
(10) Float is not in appropriate level
(11) Float is not effective
(12) Short circuit breaker is functioning
(13) Foreign matter clogging pump
(14) Motor burned out
(15) Motor bearing broken
(1)~(3) Contact electric power company
and devise counter-measures
(4) Inspect electric circuit
(5) Correct wiring
(6) Inspect connections and magnetic coil
(7) Check circuit then replace fuse
(8) Replace with correct one
(9) Raise water level
(10) Adjust the position of float
(11) Repair or replace
(12) Repair location of short circuit
(13) Remove foreign matter
(14) Repair or replace
(15) Repair or replace
Operates, but stops
after a while.
(1) Prolonged dry operation has activated
motor protector and caused pump to stop
(2) High liquid temperature has activated
motor protector and caused pump to stop
(3) Reverse rotation
(1) Raise water level to C.W.L.
(2) Lower liquid temperature
(3) Correct rotation
Does not pump.
Inadequate volume.
(1) Reverse rotation
(2) Significant drop in voltage
(3) Operating a 60 Hz pump with 50 Hz
(4) Discharge head is high
(5) Large piping loss
(6) Low operating water level causes air
suction
(7) Leaking from discharge piping
(8) Clogging of discharge piping
(9) Foreign matter in suction inlet
(10) Foreign matter clogging pump
(11) Worn impeller
(1) Correct rotation (see Operation)
(2) Contact electric power company
(3) Check nameplate
(4) Recalculate and adjust
(5) Recalculate and adjust
(6) Raise water level or lower pump
(7) Inspect, repair
(8) Remove foreign matter
(9) Remove foreign matter
(10) Remove foreign matter
(11) Replace impeller
Over current.
(1) Unbalanced current and voltage
(2) Significant voltage drop
(3) Motor phase malfunction
(4) Operating 50 Hz pump on 60 Hz
(5) Reverse rotation
(6) Low head. Excessive volume of water
(7) Foreign matter clogging pump
(8) Motor bearing is worn out or damaged
(1) Contact electric power company
(2) Contact electric power company and
devise counter-measure
(3) Inspect connections and magnetic
switch
(4) Check nameplate
(5) Correct rotation (see Operation 2)
(6) Replace pump with high head pump
(7) Remove foreign matter
(8) Replace bearing
Pump vibrates;
excessive operating
noise.
(1) Reverse rotation
(2) Pump clogged with foreign matter
(3) Piping resonates
(4)Strainer is closed too far
(1) Correct rotation
(2) Disassemble and remove foreign
matter
(3) Improve piping
(4) Open strainer
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