Causes Of Break Downs And Defects - EBARA OM4A Installation Manual

INSTALLATION MANUAL
CAUSES OF FAILURE OR DEFECTS
No power supply
Supply voltage too low
Disconnected or
damaged cable
Excessive starting
voltage drop
Fuses burnt
NO START
Switch / Thermal activated
Supplied with 2 phases
(three-phase motor)
Damaged axial bearing
Incorrect capacitor
(single-phase motor)
Level probe turned off (if available)
Operating level too deep
Rotor/Pump locked
Faulty
stator
GROUNDED
MOTOR
Overload
Lightning
discharge or
over voltage
Overheating
Grounded
supply cable
Grounded connection
O´ring outseat or cut
Water leaks
From diaphragm
From supply cable
Run and start windings
exchanged on control panel
(single-phase motor)
RUNS
SLOWLY
Wrong winding connections
(three-phase motor)
FREQUENT
STARTS AND
STOPS
Wrong voltage
Wrong capacitor
Defective motor winding
Supplied with 2 phases
instead of 3 (three-phase motor)
POWER
INPUT
TOO HIGH
Overload
Level probe
defected
Leaks in plant
NO STOP
OM4A
Model
Damage to the level probe
Oversized pump
To high liquid
temperature
To high power
absorption
Leaks in plant
Incorrect pump
Defective pump
Damage thrust bearing
Liquid temperature
too high
Too many startings
per hour
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