Grundfos 97771617, Инструкция по установке и эксплуатации

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English (GB)
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9. Fault finding
See also section 7.3 Service instructions .
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.
Fault Cause Remedy
1. Motor does not start
when the level in the
tank reaches the start
level. a) Supply failure. Reestablish the power supply.
b) Fuse blown.
If new fuse blows at once,
either cable or motor is faulty. Replace the fuse.
Measure cable and motor. If cable or
motor is defective, replace the defective
parts.
c) Impeller stuck. Thermal switch
tripped. Free the impeller, and wait until the
motor is cooled down and the thermal
switch has reset.
d) Float switch stuck. Remove the float switch and clean the
pipe.
2. Motor hums but does
not operate. a) Impeller stuck. Free the impeller and check that it can
rotate freely.
b) Motor or capacitor defective. Replace the motor or capacitor.
3. Motor runs
continuously or at
irregular intervals. a) Water leaking from inlet into
tank. Check for leaking appliances.
b) Water leaking back into tank
from discharge pipe. Check the non-return flap.
c) Float switch defective or stuck. Clean the float switch unit or replace it,
if necessary.
4. Motor runs but does not
evacuate water. a) Pump or tank blocked. Remove blockage.
b) Air lock in pump or vent hole in
pump housing blocked. 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.
c) Discharge port or pipe blocked. Remove blockage.
Check the non-return flap.
5. The lifting station
evacuates slowly. a) Discharge pipe is too long or
has an excessive number of
bends. Increase the discharge pipe size
(maximum 40 mm).
Change pipework to reduce number of
bends.
Change bends to soft bends.
b) The pump housing is leaky. Replace the pump housing
(service part).
c) Hydraulics blocked. Check that the motor shaft can rotate
freely. Remove the motor flange to clean
the impeller.
6. Rattling noise from the
lifting station, but water
is evacuated. a) Foreign body hitting the
impeller. Remove the foreign body.
7. Odour from the tank. a) Carbon filter contaminated. Replace the carbon filter.