12
Troubleshooting
1. Unable to pump or insufficient pumping
2. Motor overheats
3. Pump vibrates
WORLD CHEMICAL USA (“WCUSA”)
Unable to pump or insufficient pumping
Insufficient discharge volume
and pressure
Unable to pump even after opening
Discharge valve
Unable to pump even after pouring
priming liquid into the pump
Pump
rotates in
reverse
Air in the
suction pipe
Resistance
in the
discharge
pipe
Air enters
from the
suction
pipe/connecti
on section
Magnet
coupling
loses
Lack of
priming
liquid
Foreign
object in the
suction pipe
Replace
motor wiring
Inspect the
piping
Remove the
foreign
object and
inspect any
damage of
piping
Inspect the
connection
section and
liquid surface
in a tank
Inspect no
foreign
object in the
pump
and
estimate
whether it is
overload or
not
Pour
priming
water and
eliminate all
air in the
pump
Clean the
suction pipe
Motor overheats
Overheat
Inspect to see if the correct specific
gravity and viscosity are used
Verify to see if the correct voltage
and frequency are used for the
motor
Operating temperature is high
Turn down the operating temperature
Pump vibrates
Unstable
installation
place
Looseness
bolts for
pump
installation
Foreign
object in the
suction pipe
Worn
bearing of
the pump
Damaged
shaft
Contact
between
impeller and
stationary
Worn
bearing of
the motor
Re-install
the pump
Tight bolts
Remove the
foreign
object and
clean up
Replace the
part
Replace the
part
Replace the
part
Replace the
bearing or
the motor
Min. liquid level is low
Increase the min. liquid level
