LEYBOLD MAG 1500 CT, Operating Instructions Manual

Page: 97 / 112

GA05141_0702 - 09/2004
97
Troubleshooting
Failure Message on
Display
Motor Temp.
Temperature sensor inside
the motor reads a higher
temperature value than the
failure threshold (140
° C).
Cooling Temp.
Temperature sensor at
cooling water block reads
a higher temperature value
than the failure threshold
(60
° C).
Bearing Temp.
Temperature sensor inside
the pump reads a higher
temperature value than the
failure threshold (100
° C).
Converter Temp.
Temperature sensor inside
of the converter reads a
higher temperature value
than the failure threshold
(90
°
C).
Measures
Acknowledge failure message.
Take the actual motor temperature reading from the
display; see Section 3.10.1. 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/CC and X23/BB. The
resistance is typically 2k
Ω ± 1 %. In case of abnor-
mal values (> 3.4 k Ω ) are measured contact Leybold
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/CC and
X20/BB with the cable connected to the pump. The
resistance is typically 2k
Ω
± 1 %.
Replace the cable if it is damaged or in case the
measurement of the resistance shows abnormal
values (> 3.4 k
Ω ) now.
Contact Leybold service.
Apply cooling water according to specifications.
Check cooling water tubes for deposits. See also
Section 2.5.
Contact Leybold service.
Apply cooling water according to specifications.
Check cooling water tubes for deposits. See also
Section 2.5.
Allow pump to cool down between the cycles.
Check pump (temperature sensor)
Check pump connector X23. In particular measure
resistance between pins X23/q and X23/R. The resi-
stance is typically between 110
Ω
and 130
Ω
(20
°
C
to 70 ° C). In case abnormal values are measured
contact Leybold service.
Contact Leybold service.
Allow converter to cool down between the cycles.
Refer to Section 2.7 for the correct mounting of the
converter in a rack; max. ambient temperature
45
° C.
Contact Leybold service.
Possible Cause
Motor temperature exceeds the failure
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.
Converter failure.
Cooling water flow too low or cooling
water temperature too high.
Frequent acceleration and decelera-
tion of the pump.
Pt 100 (temperature sensor bearing)
damaged.
Converter failure.
Frequent acceleration and decelera-
tion of the pump.
No sufficient air circulation.
Converter failure.
5.2 Failure messages