Troubleshooting
Troubleshooting
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Fault
Cause
Remedy
1. The pump does not run
a. The fuses are blown
Replace the blown fuses. If the new fuses blow
too, check the electrical installation and the drop cable.
b. The GFI circuit breaker has tripped.
Reset the circuit breaker.
c. No electricity supply.
Contact the Electricity provider.
d. The motor protection has cut off the
Check for motor/pump blockage.
electricity supply due to overload.
e. The drop cable is defective.
Repair/replace the pump/cable.
f.
Overvoltage has occurred.
Check the electricity supply
2. The pump runs but gives
a. The discharge is closed.
Open the valve
no water.
b. No water or too low water level in well.
See item 3a.
c. Check valve is stuck in it’s closed position.
Pull the pump and clean or replace the valve.
d. The suction strainer is closed.
Pull the pump and clean the strainer.
e. The pump is defective.
Repair/replace the pump.
3. The pump runs at reduced
a. The drawdown is larger than anticipated.
Increase the installation depth of the pump, throttle the pump
capacity.
or replace it with a smaller capacity model.
b. The valve s in the discharge pipe are partly
Check and clean/replace the valves as necessary.
closed/blocked.
c. The discharge pipe is partly chocked by
Clean/replace the discharge pipe.
impurities (Iron bacteria).
d. The non- return valve of the pump is blocked.
Pull the pump and check/replace the valve.
e. The pump and the riser pipe are partly choked
Pull out the pump. Check and clean or replace the pump, if
by impurities (Iron bacteria).
necessary. Clean the pipes.
f.
The pump is defective.
Repair/replace the pump.
g. Hole in discharge pipe.
Check and repair the piping.
h. The riser pipe is defective.
Replace.
i.
Undervoltage has occurred.
Check the electricity supply.
4. Frequent starts and stops.
a. The differential of the pressure switch
Increase the differential. However, the stop pressure must
between the start and stop pressures is too
not exceed the operating pressure of the pressure tank, and
small.
the start pressure should be high enough to ensure sufficient
water supply.
b. The water level electrodes or level switches
Adjust the intervals of the electrodes/level switches to ensure
in the reservior have not been installed
suitable time between the cutting-in and cutting-out of the
correctly
pump. See installation and operating instructions for the
automatic devices used. If the intervals between start/stop
cannot be changed via the automatics, the pump capacity
may be reduced by throttling the discharge valve.
c. Checkvalve is leaking or stuck half-open.
Pull the pump and clean/replace the non-return valve.
d. The supply voltage is unstable.
Check the electrical supply.
e. The motor temperature is too high.
Check the water temperature.
