Pump is running and a fault message is displayed
Message
Symptom
Cause
Remedy
Unbalance fault
Electronic drive unit stops
the motor. The air inlet sole-
noid valve is opened. The
pump cannot restart.
Electronic drive unit cannot
position the rotor.
● Check that the pump is correctly fas-
tened to the frame (see chapter “In-
stallation specifications”).
● Turn off the mains power, wait for
15 s and restore power supply.
● If the message disappears, restart
the pump.
● If the fault occurs again, contact our
service center.
Bearing over-
load
Displacement
fault
Lower Radial
Bearing
Upper Radial
Bearing
Axial position
Lower Radial
current
Upper Radial
current
Axial current
No recovery
Not Ecc Correct
The Ecc self-inspection test
is not complete.
The electronic drive unit
stops the motor. The
“START” contact opens. The
pump cannot restart.
● Check that there are not vibrations
on the frame.
● Check that the pump is securely fas-
tened.
● Turn off the mains power, wait for
15 s and restore power supply.
● if the message disappears, try to re-
start the pump
● If the fault occurs again, contact our
service center.
For processes generating dust or con-
densable vapors, the rotor may be
blocked by process by-products.
Safety shut-
down
Mechanical or electrical
problem
The electronic drive unit
stops the motor. The
“START” contact opens. The
pump cannot restart.
● Contact our service center.
Drive fault
Motor overcurrent or fault on
Hall sensors
The electronic drive unit
stops the motor.
● Reduce the flow.
● Turn off the mains power, wait for
15 s and restore power supply.
● If the message disappears, try to re-
start the pump
● If the fault occurs again, contact our
service center.
Hardware fault
The safety contact appears
when an pump/electronic
drive unit assembly fault is
detected.
No magnetic levitation. The
pump cannot restart.
● Contact our service center.
Selfcheck failed
Mechanical or electrical
problem
No magnetic levitation. The
pump cannot restart.
● Turn off the mains power, wait for
15 s and restore power supply.
● If the fault occurs again, contact our
service center.
Electr.Tempera-
ture
The temperature of the elec-
tronic drive unit exceeds the
authorized limit > 75–80 °C
The pump cannot start.
● Check the water cooling circuit (see
chapter “Connecting the pump to the
water circuit”).
Rotate during
Powerup
The pump is powered, the
rotor is still running.
The pump cannot start.
● Wait for pump rotor has stopped be-
fore switching the power off.
● Disconnect and reconnect the mains
power.
● If the fault occurs again, contact our
service center.
Malfunctions
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