Wilo -FilTec FBS Installation And Operating Instructions Manual page 12

ENGLISH
8 Fault finding- Causes and Remedies
Fault
Pump does not fill
Insufficient pump
performance
Motor failure
If the faults cannot be located and rectified, please contact your nearest Wilo representative.
12
Cause
Air entry in suction pipe
Cover of lint strainer does
not seal tight
Wrong direction of motor
rotation (3-phase motor)
Air entry in suction pipe
Wrong direction of motor
rotation (3-phase motor)
Pressure loss in suction
pipe
Wrong voltage
Chocked lint strainer
Chocked main sand filter
Loss of phase
WSK of pump motor has
tripped
Remedy
Check condition of pipe, connections,
and seals.
Clean strainer cover and check condition
of O-ring washer.
Change any two phase wires.
Check condition of pipe , connections,
and seals.
Change any two phase wires.
Eliminate any element causing excessive
resistance.
Check that available voltage corresponds
with name plate data.
Clean lint strainer
Start backwash cycle.
The original operating conditions are
automatically restored on power restoration.
Let motor cool down, reset fault at switchbox,
pump will restart. On repeated tripping of the
WSK it will be necessary to check pump
electrically and mechanically.
Technical modifications reserved!