EN
28
TROUBLESHOOTING
NOTE: Shut-o the pump and disconnect it from the mains supply before checking.
Problem Cause Action
The motor will not start. A. Loose contact in the power
switch.
B. The fuse has tripped.
C. Cable not connected.
D. Phase dropped.
A. Repair or replace.
B. Reset or replace the fuse.
C. Connect the cable.
D. Repair or replace the cable.
Defective capacitor Replace with a new one of the same type.
Faulty bearing. Replace the bearing.
Blocked impeller. Turn the impeller with a screwdriver to
remove the contaminants, or drain and
dismantle the pump housing for cleaning.
Damaged stator winding. Rewind the stator.
The pump runs, but fails to
deliver water.
Incorrect direction of rotation. Reverse the two wires in the connector
(3-phase motor).
The pump is not lled with
water correctly.
Rell the pump with water.
Damaged impeller. Replace the impeller.
Leak on the inlet pipe. Seal or replace the inlet pipe.
Too low water level. Adjust the pump’s installation height.
The water has frozen in the pump
chamber or pipes.
Wait until the pump and pipes have
thawed and then start.
Plastic components damaged because
of too high water temperature.
Replace damaged parts.
Too low pressure. Pump not suited for the type of task. Use a suitable pump.
The inlet pipe is too long, has
too many bends and/or too
small diameter.
Use an inlet pipe with the stated diam-
eter and which is as short and straight
as possible.
Inlet pipe, lter or pump chamber
clogged.
Clear inlet line, bottom valve and/or
pump chamber.
The motor works intermittently
or the stator winding is burned.
The impeller has been blocked or
the pump has been overloaded for
a long time.
Clear the pump chamber and run the
pump within the specied rated ow.
Defective earth, connection fault or
pump damaged by lightning.
Earth the pump correctly, reset the cor-
rect connection and rewind the stator.
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