Advertisement
4) Check rotation of the motor (three-phase motor)
5) Check whether operation of the electric pump is normal,
rotation is correct, which could be observed from the fan blade
terminal, e.g. clockwise rotation means correct direction. In
case the rotation is incorrect, cut off power and exchange the
two power leads.
6) Automatic device
6.1) While using the automatic pump, in case it still operates
after turning off the water tap, lower down power cut-off pres-
sure of the pressure switch on the premise of pipeline without
leakage, namely, rotate the variable screw nut IJ in counter-
clockwise direction(-) to acquire lower Closed pressure.
6.2) In case the pump is often enabled when the water tap is
turned off (sometimes it is turned on and sometimes it is turned
off), check whether pipeline and the bottom valve have leakages
and pressure vessel pressure is normal, eliminate timely if any.
6.3) In case the pressure switch is alternately turned on or
turned off (frequent start) after turning on the water tap,
increase power cut-off pressure of the pressure switch, namely,
rotate the variable screw nut 1 in clockwise direction to acquire
higher cut-in pressure.
9. START-UP AND MAINTENANCE
Do not start up the pump before the pump chamber is filled
with water.
Do not touch the electric pump unless its power has been cut
off for at least 5 minutes. Do not dismount the pump body
unless water in the pump chamber is empted.
10. TROUBLESHOOTING
PROBLEM
The motor can not be
started
The motor is in operation,
but no water is discharged
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
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 i1 electrical faults.
7) In case the motor is hot or abnormal, cut off the power im-
mediately and check faults according to the following table.
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
Advertisement
