Wilo Atmos GIGA-N - Page 36

en Faults, causes and remedies
36 WILO SE 2019-04
Error type:
1 2 3 4 5 6 7 8 Cause Remedy
X
Incorrect direction of
rotation
– Change the motor
connection phases
X
Pump sucks air or the
suction line is leaky
– Replace gasket
– Check suction line
X
Supply line or impeller
clogged
– Remove clog
X
X Pump blocked by loose
or jammed parts
– Clean pump
X
Air pockets in the piping – Change the pipe lay-
out or install an air vent
valve
X
Speed too low
– with frequency con-
verter operation
– without frequency
converter operation
– Increase frequency in
the permissible range
– Check voltage
X
X Motor running on
2phases
– Check phases and
fuses
X X Counter pressure of the
pump too low
– Readjust the duty
point or adjust the im-
peller
X The viscosity or density
of the fluid is higher
than the design value
– Check the pump di-
mensioning (consult
with the manufacturer)
X X X X X The pump is strained Correct the pump in-
stallation
X X Speed too high Lower speed
X X X Pump unit poorly
aligned
– Correct alignment
X Thrust too high – Clean the relief bores
in the impeller
– Check the condition
of the neck rings
X Bearing lubrication not
sufficient
Check bearing, ex-
change bearing
X Coupling distance not
maintained
– Correct the coupling
distance
X X X – Flow rate too low – Maintain recommen-
ded minimum flow rate
X – Housing screws not
correctly tightened or
gasket defective
– Check tightening
torque
– Replace gasket
X Leak in mechanical seal – Replace the mechan-
ical seal
X Shaft sleeve (if present)
worn
– Replace the shaft
sleeve
X X Imbalance of the im-
peller
– Rebalance the im-
peller
X Bearing damage – Exchange bearing
X Foreign object in the
pump
– Clean pump
X Pump pumps against
closed shut-off device
– Open the shut-off
device in the pressure
pipe
Table11: Causes of error and remedies