Troubleshooting
50
GA 05.139/1.02 - 06/99
Warning Message
on Display
Motor Temp.
Temperature sensor inside
the motor reads a higher
temperature value than the
warning threshold (100 °C).
Bearing Temp.
Temperature sensor inside
the pump reads a higher
temperature value than the
warning threshold (75 °C).
Converter Temp.
Temperature sensor inside of
the converter reads a higher
temperature value than the
warning threshold (70 °C).
Cooling Temp.
Temperature sensor at coo-
ling water block reads a hig-
her temperature value than
the warning threshold (45
°C).
Measures
Take the actual motor temperature reading
from the display; see Section 4.3.1.
Reduce gas load. If the warning persists
contact Leybold service.
Contact Leybold service.
Apply cooling water according to specificati-
ons. Check cooling water tubes for deposits.
See also Section 2.6.
Allow pump to cool down between the
cycles.
Check chamber temperature.
If the red LED at the water valve is on dis-
connnect and connect the connector. The
valve must make noises. If not contact Ley-
bold.
Allow converter to cool down between the
cycles.
Refer to Section 2.8 for the correct mounting
of the converter in a rack; max. ambient
temperature 45 °C.
Apply cooling water according to specificati-
ons. Check cooling water tubes for deposits.
See also Section 2.6.
Possible Cause
Motor temperature exceeds the warning
threshold e.g. due to a high gas load.
Drive failure or internal converter failure.
Cooling water flow too low or cooling water
temperature too high.
Frequent acceleration and deceleration of
the pump.
Temperature at the high-vacuum connection
flange or at the isolation valve is much
higher than 85 °C.
Water valve malfunction.
Frequent acceleration and deceleration of
the pump.
No sufficient air circulation.
Cooling water flow too low or cooling water
temperature too high.
6.1 Warning messages
6 Troubleshooting
In case of a malfunction, the MAG will be braked and the
first line of the display shows
FAILURE
Malfunction messages can be cancelled once the pump
has come to a stop and after the malfunction has been
rectified; do so with the STOP function (button or serial
interface).
Warning
The MAG shall be stopped completely and
the mains power cord detached before you
open the MAG.DRIVE. Since dangerous
voltages may nonetheless be encountered,
the housing must be opened only by a qua-
lified electrician.
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