LEYBOLD MAG W 1600 C - Page 76

Troubleshooting for the MAG.DRIVE L2
76
GA 05.130/3.02 - 05/98
Failure Message on
Display
Cooling Temp. SC
The cooling water tempera-
ture sensor reads a tempera-
ture lower than 1 °C.
Bearing Temp. SC
The magnetic bearing tem-
perature sensor reads a tem-
perature lower than 1 °C.
Motor Temp. SC
The motor temperature sen-
sor reads a temperature
lower than 1 °C.
Connection pump
Frequency
Abnormal motor current or
frequency
Measures
Repeat step 1 of „failure Cooling Temp.“.
Contact Leybold service if the resistance of
the sensor is less than 100 Ω.
Repeat step 2 of „failure Cooling Temp.“.
Contact Leybold service if the resistance of
the sensor is less than 100 Ω.
Contact Leybold service.
Repeat step 1 of „failure Bearing Temp.“.
Contact Leybold service if the resistance of
the sensor is less than 100 Ω.
Repeat step 2 of „failure Bearing Temp.“.
Contact Leybold service if the resistance of
the sensor is less than 100 Ω.
Contact Leybold service.
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.
Check if the BEARING cable is connected to
the pump and the converter. Acknowledge
failure message.
Contact Leybold service.
Check cables and connectors, straighten
pins if required.
Acknowledge failure message; see Section
4.4. If failure persists contact Leybold servi-
ce.
Acknowledge failure message and restart
the pump.
Possible Cause
Temperature sensor Pt 100 short-circuited.
TMS cable short-circuited.
Converter failure.
Temperature sensor Pt 100 short-circuited.
BEARING cable short-circuited.
Converter failure.
Temperature sensor KTY short-circuited.
BEARING cable short-circuited.
Converter failure.
BEARING cable not connected.
Converter failure.
On START command: DRIVE cable not
connected or connectors damaged.
The rotor frequency exceeds 515 Hz.
A STOP commend followed by a START
command given while the warning „Over-
speed“ is displayed.