Wilo -Atmos BST Instrucciones De Instalación Y Funcionamiento página 52

en
52
Faults Causes
• Impeller damaged and
corroded
Insufficient volume • Seal ring damaged and
flow corroded
• Motor speed is lower than
required
• Incorrect direction of ro-
tation
• Min. inlet pressure too low
Delivery head losses or negative suction head
too high
• Impeller damaged and
corroded
• Volume flow is outside
the permissible field of
application
• Voltage higher than rated
Motor overheating
voltage
• Voltage too low, fan
works too slowly
• Motor fan damaged
• Housing screws not
Leakage at the pump
tightened
Noise, bearings become • Motor bearings damaged
hot • The pump is strained
• Volume flow rate is out-
side the permissible field
Pump makes noises
of application and causes the delivery head loss
• Power supply failure
• Fuses have tripped or
blown
• Motor protection switch
Pump does not start
has been triggered
• Thermal protection has
tripped out
• Motor is malfunctioning
• A fuse/circuit breaker has
tripped or blown
Motor overload trips • Cable connection is loose
out immediately when or faulty
power supply is activ-
• Motor winding is defect-
ated
ive
• Pump mechanically
clogged
• Overload setting is too
Motor overload trips
low
out occasionally
• Low voltage at peak times
• Pump inlet pressure is too
low (cavitation)
Pump capacity not
• Suction pipe/pump partly
constant
clogged by impurities
• Pump draws in air
Installation and operating instructions • Wilo-Atmos BST • Ed.01/2023-07
Remedy
• Replace impeller
• Replace gasket
• Check voltage
• Change motor wiring (3 phase
motor: swap phases)
• Correct liquid level, reduce
resistances in the suction line
• Replace impeller
• Adhere to recommended
minimum volume flow
• Check voltage
• Check voltage
• Check motor fan
• Tighten the housing screws
• Have bearings replaced
• Correct the pump installation
• Adhere to recommended
minimum volume flow
• Check power supply
• Replace fuses
• Reactivate the motor protec-
tion
• Reactivate the thermal pro-
tection
• Replace motor (contact ser-
vice)
• Cut in the fuse
• Fasten or replace the cable
connection
• Replace motor (contact ser-
vice)
• Remove clogging
• Set motor protection switch
correctly
• Check power supply
• Check the suction conditions
• Clean pump and supply line
• Check the suction conditions