Pump is running and a fault message is displayed
Message
Symptom
Cause
Remedy
Magnetic bear-
ing
Electronic drive unit stops
the motor. The air inlet sole-
noid valve is opened.
Rotor levitation fault
● Wait for pump rotor to stop com-
pletely.
● 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.
Pump Temper-
ature
The pump temperature ex-
ceeds the authorized limit:
> 105 °C (Pump MT version)
> 110 °C (Pump M version)
The electronic drive unit
stops the motor until the
temperature drops to 105 or
110 °C, after which the mo-
tor restarts.
● Check the water cooling circuit (see
chapter “Connecting the pump to the
water circuit”).
Bearing
The landing bearings must
be replaced: landing bearing
counter reaches the warning
threshold.
The authorized limit for the
number of landings on land-
ing bearings is reached.
● Contact our service center.
Seized Pump
Electronic drive unit stops
the motor.
Rotor is blocked.
● 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.
Not Accelerat-
ing
Electronic drive unit stops
the motor.
The pump cannot acceler-
ate.
● Check if the backing pump is running
(level of fore vacuum).
Internal com-
munication
The pump cannot start.
Internal communication fault
● 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.
Malfunctions
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