Troubleshooting
52
GA 05.139/1.02 - 06/99
Failure Message on
Display
Motor Temp.
Temperature sensor inside
the motor reads a higher
temperature value than the
failure threshold (100 °C).
Cooling Temp.
Temperature sensor at coo-
ling water block reads a hig-
her temperature value than
the failure threshold (55 °C).
Measures
Acknowledge failure message.
Take the actual motor temperature reading from the
display; see Section 4.3.1.
Reduce gas load. If the warning persists contact
Leybold service.
Step 1: Check pump (temperature sensor)
Check pump connector X23. In particular measure
resistance between pins X23/x and X23/w. The
resistance is typically 2kΩ ± 1 %. In case of abnor-
mal values (> 3.4 kΩ) are measured contact Ley-
bold service.
Step 2: Check BEARING cable
If step 1 was successful do the following:
Check BEARING cable for bent pins
Measure the resistance between pins X20/x and
X20/w with the cable connected to the pump. The
resistance is typically 2kΩ ± 1 %.
Replace the cable if it is damaged or in case the
measurement of the resistance shows abnormal
values (> 3.4 kΩ) now.
Contact Leybold service.
Apply cooling water according to specifications.
Check cooling water tubes for deposits. See also
Section 2.6.
Step 1: Check cooling water temperature sen-
sor
Check pump connector X30. In particular measure
resistance between pins X30/S and X30/V. The
resistance is typically between 110 Ω and 130 Ω
(20 °C to 70 °C).
Step 2: Check TMS cable and connectors
If step 1 was successful do the following:
Check TMS cable for bent pins
Measure the resistance between pins X26/W and
X26/V with the TMS cable connected to the pump.
The resistance is typically between 110 Ω and 130
Ω (20 °C to 70 °C).
Replace TMS cable if it is damaged or in case the
measurement of the resistance shows abnormal
values now.
Contact Leybold service.
Possible Cause
Motor temperature exceeds the failu-
re threshold e.g. due to a high gas
load.
Motor temperature sensor defective.
BEARING cable or connector dama-
ged.
Converter failure.
Cooling water flow too low or cooling
water temperature too high.
Pt 100 (cooling water temperature
sensor) damaged.
TMS cable or connectors damaged.
Converter failure.
6.2 Failure messages
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