Failure Message on
Display
Bearing Temp. SC
The magnetic bearing tempe-
rature sensor reads a tempe-
rature lower than 1 °C.
Motor Temp. SC
The motor temperature sen-
sor reads a temperature
lower than 1 °C.
Frequency XX*
Abnormal motor current or
frequency
*XX is a code no. between 43
and 55. It helps the
Leybold service to find the
cause of the failure.
No Motor Current
Measures
Check pump connector X23. In particular
measure the resistance between pins X23/q
and X23/R. Contact Leybold if the resistance
of the sensor is under 100 Ω.
Repeat step 1 of “failure Motor Temp.”.
Contact Leybold service if the resistance of
the sensor is less than 1.62 kΩ.
Repeat step 2 of “failure Motor Temp.”.
Contact Leybold service if the resistance of
the sensor is less than 1.62 kΩ.
Contact Leybold service.
Acknowledge failure message. If failure per-
sists contact Leybold service.
Contact Leybold service.
Check cables and connectors, straighten pins
if required.
Deactivate “Emergency off” via control plug
X14 and acknowledge failure message.
Reconnect or replace DRIVE cable.
Possible Cause
Temperature sensor Pt 100 short-circui-
ted.
Temperature sensor KTY short-circuited.
BEARING cable short-circuited.
Converter failure.
The rotor frequency exceeds the nominal
speed plus 5%.
Converter failure.
On START command: DRIVE cable not
connected or connectors damaged.
Resultant message after activating
“Emergency off”.
DRIVE cable interrupted during operation
of the MAG.
TMS temperature sensor Pt 100
Cooling water temperrature sensor Pt 100
Pin 1 and 3 of the
temperature sensors
Heater plug X31
typical resistance 70 to 75 Ω
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