English (GB)
17
Fault
Cause
Remedy
1. The pump does not
run.
a) The fuses are blown.
Replace the blown fuses. If the new ones blow too,
check the electric installation and the submersible
drop cable.
b) The ELCB or the voltage-operated ELCB has
tripped.
Cut in the circuit breaker.
c) No power supply.
Contact the power supply company.
d) The motor-protective circuit breaker has
tripped.
Reset the motor-protective circuit breaker
(automatically or possibly manually). Check the
voltage if it trips again. If the voltage is okay, see items
1 e) to 1 h).
e) The motor-protective circuit breaker or the
contactor is defective.
Replace the motor-protective circuit breaker or the
contactor.
f)
Starter device is defective.
Repair or replace the starter device.
g) The control circuit has been interrupted or is
defective.
Check the electric installation.
h) The dry-running protection has cut off the
power supply to the pump due to low water
level.
Check the water level. If it is okay, check the water
level electrodes or level switches.
i)
The pump or the submersible drop cable is
defective.
Repair or replace the pump or cable.
2. The pump runs but
gives no water.
a) The outlet 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 closed
position.
Pull out the pump and clean or replace the valve.
d) The inlet strainer is blocked.
Pull out the pump and clean the strainer.
e) The pump is defective.
Repair or replace the pump.
3. The pump runs at
reduced performance.
a) The drawdown is larger than anticipated.
Increase the installation depth of the pump, throttle the
pump or install a pump with a smaller performance.
b) Wrong direction of rotation.
6.6 Connection of three-phase motors
.
c) The valves in the outlet pipe are partly closed
or blocked.
Clean or replace the valves.
d) The outlet pipe is partly blocked by impurities
(ochre).
Clean or replace the pipe.
e) The non-return valve of the pump is partly
blocked.
Pull out the pump and clean or replace the valve.
f)
The pump and the riser pipe are partly blocked
by impurities (ochre).
Pull out the pump and clean or replace it. Clean the
pipes.
g) The pump is defective.
Repair or replace the pump.
h) Leakage in the pipes.
Check and repair the pipes.
i)
The riser pipe is defective.
Replace the pipe.
4. Frequent starts and
stops.
a) The differencebetween the start and stop
pressures is too small.
Increase the difference. The stop pressure must not
exceed the operating pressure of the pressure tank,
and the start pressure must be high enough to ensure
sufficient water supply.
b) The water level electrodes or level switches in
the reservoir have not been installed correctly.
Adjust the intervals of the electrodes or level switches
to ensure suitable time between the cutting-in and
cutting-out of the pump. See installation and operating
instructions for the electrodes or level switches. If the
intervals between stop and start cannot be changed
via the automatics, the pump performance may be
reduced by throttling the outlet valve.
c) The non-return valve is leaking or stuck
half-open.
Pull out the pump and clean or replace the valve.
d) The precharge pressure of the tank is too low. Adjust the precharge pressure of the tank in
accordance with its installation and operating
instructions.
e) The tank is too small.
Increase the capacity of the tank by replacing it or
supplementing it with an additional tank.
f)
The diaphragm of the tank is defective.
Check the diaphragm tank.
