English (GB)
18
SQE-NE: Only pumps that can be certified as
uncontaminated, i.e. pumps containing no hazardous
and/or toxic material, may be returned to Grundfos
for servicing.
To prevent injury to the health of persons involved
and to the environment, a document certifying that
the pump is clean is required.
Grundfos must receive this certificate before the
product. Otherwise, Grundfos will refuse to accept
the product for servicing.
Possible costs of returning the pump are paid by the
customer.
10. Fault finding chart
Warning
Before starting any work on the pump/motor, make sure that the power supply has been
switched off and that it cannot be accidentally switched on.
Fault Cause
Remedy
1.
The pump does
not run.
a)
The fuses in the electric
installation are blown.
Replace the blown fuses. If the new ones
blow too, the electric installation and the
submersible drop cable should be
checked.
b)
The ELCB or the voltage-operated
ELCB has tripped out.
Cut in the circuit breaker.
c)
No power supply.
Contact the power supply authorities.
d)
The motor protection has cut off
the power supply due to overload.
Check whether the motor/pump is blocked.
e)
The pump/submersible drop cable
is defective.
Repair/replace the pump/cable.
f)
Overvoltage or undervoltage has
occurred.
Check the power supply.
2.
The pump runs
but gives no
water.
a)
The discharge valve is closed.
Open the valve.
b)
No water or too low water level in
borehole.
See item 3 a).
c)
The non-return valve is stuck in its
closed position.
Pull out the pump and clean or replace the
valve.
d)
The suction strainer is choked up.
Pull out the pump and clean the strainer.
e)
The pump is defective.
Repair/replace the pump.
