Fault Finding - Grundfos Sololift WC-1 Montage- Und Betriebsanleitung

9. Fault finding

Warning
Remove the fuse, pull out the plug, or
switch off the power supply.
Make sure that the power supply cannot
be accidentally switched on.
All rotating parts must have stopped
moving.
The product must only be serviced by
trained service personnel.
See also section 7.4 Service
Fault
1. Motor does not start
when the level in the
tank reaches the start
level.
2. Motor hums but does
not operate.
3. Motor runs
continuously or at
irregular intervals.
4. Motor runs but does
not evacuate water.
5. The lifting station
evacuates slowly.
6. Rattling noise from the
lifting station, but
water is evacuated.
7. Odour from the tank.
instructions.
Cause
a) Supply failure.
b) Fuse blown.
If new fuse blows at once,
either cable or motor is faulty.
c) Impeller/grinder stuck.
Thermal switch tripped.
d) Pressure switch pipe blocked.
a) Impeller/grinder stuck.
b) Motor or capacitor defective.
c) Control board defective.
a) Water leaking from inlet into
tank.
b) Water leaking back into tank
from discharge pipe.
c) Pressure switch defective.
a) Pump or tank blocked.
b) Air lock in pump or vent hole in
pump housing blocked.
c) Discharge port or pipe blocked.
a) Discharge pipe is too long or
has an excessive number of
bends.
b) The pump housing is leaky.
c) Hydraulics or grinder blocked.
a) Foreign body hitting the
impeller/grinder.
a) Carbon filter contaminated.
Remedy
Reestablish the power supply.
Replace the fuse.
Measure cable and motor. If cable or
motor is defective, replace the defective
parts.
Free the impeller/grinder, and wait until
the motor is cooled down and the
thermal switch has reset.
Remove the pressure switch and clean
the pipe.
Free the impeller/grinder and check that
it can rotate freely.
Replace the motor or capacitor.
Replace the control board.
Check for leaking appliances.
Check the non-return flap.
Replace the pressure switch unit.
Remove blockage.
Check operation of vent valve in the
tank.
Check that the carbon filter is not wet.
Check that the vent hole in the pump
housing is not blocked.
Remove blockage.
Check the non-return flap.
Increase discharge pipe size.
Change pipework to reduce number of
bends.
Change bends to soft bends.
Replace the pump housing
(service part).
Check and clean the hydraulics and
grinder.
Remove the foreign body.
Replace the carbon filter.
9