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12. DEPANNAGE
Symptom
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
The motor can not
jammed.
be started
Impeller is jammed.
Stator winding is damaged.
Pipe pressure above the setting
pressure of pressure switch
(automatic pump).
Incorrect direction of pump rotation.
The motor is in
operation, but no
The pump is not fully filled with water.
water is
The impeller is damaged.
discharged
Leakage of the suction pipe.
Water level is too low.
Freeze caused by accumulated water
in the pipeline or the chamber.
All manuals and user guides at all-guides.com
Check the pump after power cut-off.
Cause
Corrective Action
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).
Increase power cut-off pressure of the
pressure switch, namely, rotate the
variable screw nut in "+" direction one
or two round, or change with more
suitable product.
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.
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