PROBLEM POSSIBLE CAUSE SOLUTION
The motor can not be
started
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
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
Capacitor is burned out
Replace with a same type capacitor (send to the
maintenance point for repair)
The rotating shaft and bearing are jammed.
Replace the bearing (send to the maintenance
point for repair)
Impeller is jammed.
Turn rotating shaft of the fan blade terminal with
screw driver to let it rotate flexibly or demount
the pump body to clear sundries.
Stator winding is damaged
Replace winding coils (send to the maintenance
point for repair)
The motor is in operation,
but no water is discharged
Incorrect direction of pump rotation
Invert two-phase wirings of the motor (three-
phase motor)
The pump is not fully filled with water Re-fill the pump with water.
The impeller is damaged
Replace the impeller (send to the maintenance
point for repair)
Leakage of the suction pipe
Check sealing of various joints of the inlet
pipelines
Water level is too low Adjust installation height of the pump
Freeze caused by accumulated water in the
pipeline or the chamber
Start up the pump after ice is melted
Insufficient pressure
Incorrect pump type Select suitable pump
The inlet pipeline is too long or with too
many bends, pipe diameter is not selected as
required.
Apply the pipe with the stipulated diameter, and
make the inlet pipe short.
Inlet pipeline, filter screen or pump chamber is
blocked by foreign materials
Clean pipeline, foot valve or pump chamber, clear
sundries
Motor works intermittently
or the stator winding is
burned out
The impeller is jammed or overload operation
for a long time
Clear sundries in the pump chamber; operate the
pump under the rated flow as much as possible.
Incorrect grounding, broken cable or the
electric pump is hit by lightning.
Seek for the reason, and replace winding coils.
10. TROUBLESHOOTING
the pump chamber with clean water from the water
injectionhole, then tighten the plug screw after the air has been
completely discharged. Set the valve in a smaller flow in start-up
and adjust to the required flow after water discharging (working
range is displayed on the nameplate).
Attention:
1) The pump chamber should be filled with water before first use
and water refilling is unnecessary in the future.
2) In case no water is discharged after being started for more
than 5 minutes with water filled, turn off the electric pump, re-fill
water or check whether the inlet pipeline has leakages.
3) In case of any frost and ice damages, please open the drain
plug to empty water in the pump chamber. When start up the
pump again, open the drain plug, fill water and tighten it and then
the pump is usable.
4) In case not use for a long time, water in the pump should
be emptied. The pump body, impeller and support should be
cleaned and coated with anticorrosive oil before they are put in a
ventilated and dry place for use.
5) In case the pump is halted for a long time, start it up again
according to above diagram.
6) In summer or when the ambient temperature is high, pay
attention to ventilation, avoid dew on electrical parts which will
result in electrical faults.
7) In case the motor is hot or abnormal, cut off the power
immediately and check faults according to the following table.
PD WATER SYSTEMS LLC
2310 W. 76TH ST. HIALEAH, FL 33016. TEL: (954) 474 9090
www.pearlwatersystems.com
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