EBARA 3U, 3UB - Manual (Page 13)

EBARA End Suction Centrifugal 3U / 3UB
Operating, Installation, and Maintenance
EBARA Fluid Handling
www.pumpsebara.com 13
(t) 803 327-5005 • (f) 803 327-5097 rev. 02/09
TROUBLE
Pump does not run.
Pump does not pump water.
Inadequate quantity.
Overcurrent
Pump vibrates, excessive operating
noise
Pressurizing application.
Pump starts and soon stops
Pump does not stop
POSSIBLE CAUSE
Faulty connection of power supply circuit.
Wrong wiring of control circuit.
Bound shaft
Mechanical seal faces stuck together
Faulty motor
Damage to bearing
Considerable voltage drop.
Rotation direction reversed.
Lack of priming.
High discharge head.
Large piping loss.
Clogged foot valve.
Leakage from suction piping.
Too high suction lift.
Low water level.
Considerable fluctuation of power supply
voltage.
Considerable voltage drop.
Low head and overflow rate.
Damaged bearing.
Beyond rated capacity.
Cavitation.
Improper piping.
Damaged bearing.
Foreign matter clogging cooling fan.
Too limited pressure switch setting.
Leakage in system.
Too high pressure setting.
TROUBLESHOOTING
Check power supply circuit.
Correct control circuit.
Remove cause of obstruction.
Release seal by turning shaft.
Repair or replace motor.
Repair or replace any damaged bearing.
Correct rotation direction.
Re-prime the pump.
Re-examine the plan.
Re-examine the plan.
Clear foot valve suction.
Check and repair suction piping.
Re-install as per our instructions.
Foot valve in ample immersion.
Throttle flow rate at outlet.
Replace any damage bearing.
Reduce flow rate.
Consult distributor
Secure piping again.
Replace any damaged bearing.
Remove foreign matter.
Replace pressure switch to wider range.
Check and repair leaks.
Reduce max pressure setting to the
lower in pressure switch.
MAINTENANCE:
The pump does not require special maintenance.
The following rules must be observed for safe operation:
If the pump is not going to be used for a long period, the pump should be drained of water and flushed with clean water.
Where the pump is exposed to freezing temperatures, it should always be left drained when not in use.
*All specifications subject to change without notice.
Troubleshooting