Troubleshooting - Pearl CQPL Series Installation And Operating Instructions Manual

10.TROUBLESHOOTING

PROBLEM
MOTOR DOES NOT START OR
RUN
THE MOTOR IS IN OPERATION,
BUT NO WATER IS DIS-
CHARGED
INSUFFICIENT PRESSURE
MOTOR WORKS INTERMIT-
TENTLY OR THE STATOR
WINDING IS BURNED OUT
LEAKAGE OF MECHANICAL
SEAL
ABNORMAL NOISE FROM
THE PUMP
POSSIBLE CAUSE
Single-phase power supply (three-phase electric
motor):
a. poor connection of the power switch;
b. fuse is burned out;
c. loose power lead;
d. phase failure of the cable
Capacitor is burned out
The rotating shaft and bearing are jammed.
Impeller is jammed.
Stator winding is damaged
Incorrect direction of pump rotation
The pump is not fully filled with water
The impeller is damaged
Leakage of the suction pipe
Water level is too low
Freeze caused by accumulated water in the pipeline
or the chamber
Incorrect pump type
The inlet pipeline is too long or with too many
bends, pipe diameter is not selected as required.
Inlet pipeline, filter screen or pump chamber is
blocked by foreign materials
The impeller is jammed or overload operation for
a long time
Incorrect grounding, broken cable or the electric
pump is hit by lightning.
The mechanical seal is worn and torn by
impurities.
Noise from the bearing
Impeller is jammed.
Excessive flow
PD WATER SYSTEMS LLC
2310 W. 76TH ST. HIALEAH, FL 33016. TEL: (954) 474 9090
www.pearlwatersystems.com
SOLUTION
a. repair switch contact or replace the switch;
b. replace the safety fuse;
c. check and tighten the power connector;
d. repair or replace cables
Replace with a same type capacitor (send to the
maintenance point for repair)
Replace the bearing (send to the maintenance point for
repair)
Turn rotating shaft of the fan blade terminal with screw
driver to let it rotate flexibly or demount the pump body to
clear sundries.
Replace winding coils (send to the maintenance point
for repair)
Invert two-phase wirings of the motor (three-phase motor)
Re-fill the pump with water.
Replace the impeller (send to the maintenance point for
repair)
Check sealing of various joints of the inlet pipelines
Adjust installation height of the pump
Start up the pump after ice is melted
Select suitable pump
Apply the pipe with the stipulated diameter, and make the
inlet pipe short.
Clean pipeline, foot valve or pump chamber, clear sundries
Clear sundries in the pump chamber; operate the pump
under the rated flow as much as possible.
Seek for the reason, and replace winding coils.
Clear or replace the mechanical seal
Replace with the same type bearing
Remove sundries
Adjust to the range displayed on the nameplate before use.