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Ebara Submersible Single Channel Sewage Pumps
Operating, Installation and Maintenance
Troubleshooting
Trouble
Motor won't turn.
(1) Foreign matter hinders level control float from functioning
Starts, but immediately
properly.
stops.
(2) Power failure.
(3) Large voltage unbalance.
(4) Significant drop in voltage
(5) There is an open phase
(6) Faulty circuit connection
(7) Blown fuse
(8) Faulty starter
(9) Defective float
(10) Malfunctioning circuit breaker
(11) Foreign matter clogging pump
(12) Motor is shorted out
(13) Motor bearings are frozen
Operates, but stops after
(1) Prolonged dry operation has activated motor protector
a while.Thermal protector
is activated.
(2) High liquid temperature has activated motor protector
Does not pump.
(1) Reverse rotation
Inadequate volume.
(2) Valve is closed or partially clogged.
(3) Significant drop in voltage
(4) Discharge head is too high
(5) Large piping loss
(6) Low water level during operation causes vortexing (air
suction)
(7) Leak in discharge piping
(8) Clog in discharge piping
(9) Foreign matter clogging pump
(10) Worn impeller
Overcurrent
(1) Large discrepancy between power source and voltage
(2) Significant voltage drop
(3) There is an open phase
(4) Reverse rotation
(5) Low head; pumping too much liquid
(6) Foreign matter clogging pump
(7) Motor bearing is worn or damaged
Pump vibrates;
(1) Reverse rotation
excessive noise during
(2) Pump clogged with foreign matter
operation.
(3) Piping vibrates
Ebara Fluid Handling
www.pumpsebara.com
(803) 327-5005 • (803) 327-5097 (fax)
Cause
and caused pump to stop
and caused pump to stop
remedy
(1) Remove foreign matter
(2 - 3) Contact electric power company for remedy
(4) Check power supply
(5) Check power supply; Inspect starter and connections
(6) Correct wiring
(7) Replace with correct size fuse
(8) Replace with correct starter
(9) Repair or replace float
(10) Repair location of circuit
(11) Remove clog from pump
(12) Repair or replace
(13) Repair or replace
(1) Raise the off float level
(2) Lower liquid temperature
(1) Correct rotation
(2) Open valve
(3) Check power supply
(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) Replace impeller
(1) Contact power company for remedy
(2) Contact power company for remedy
(3) Check power supply
Inspect starter & electrical connections
(4) Check rotation
(5) Adjust discharge valve to desired flow
(6) Remove clog from the pump
(7) Repair or replace
(1) Correct rotation
(2) Remove clog from pump
(3) Install support for discharge piping
DMLEU
10
rev. 01/13
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