Bruker BMPC/2, Technical Manual

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Troubleshooting
11.1.1.16 Warning, Possible Fan Failure Pump Cabinet
A strong temperature rise inside the pump cabinet could be caused by a defective fan.
Solution:
Check the fans inside the pump cabinet to see if they are functioning. It is pos-
sible that a fuse from one of the fans has blown. For instructions on how to exchange a
fuse please read the section "Exchanging the Pump Cabinet Ventilator Fuse" on page
84 .
Remark:
This situation also can appear while opening or closing the front door of the
pump cabinet.
11.1.1.17 Helium Measurement Error
The value for the helium level has not changed for a longer period of time, which indi-
cates that the value for the helium level is probably wrong. For more information read the
section ""He-Refill / He Measurement" on page 106 .
Solution:
1. Check the function of the Helev transfer program. This program transfers the helium
level information and some other data once a day from the BSMS to the BMPC/2.
This program must be running in order for the BMPC/2 to receive the newest data.
2. Check for a good cable connection between the He-Lev Sensor and the BSMS.
3. The calibration of the He-Lev Sensor may also be wrong.
11.1.1.18 Pump 1 Failed
Pump P1 has failed or does not work correctly. If the pump was working in automatic
mode the BMPC/2 is now using pump P2.
Solution:
1. Switch to manual pump mode.
2. Switch on P1, but do not open valve V1, and check to see if the pump is working
correctly.
3. If not, check the motor protection switch QM1. To do this open the upper rear panel
of the BMPC/2, QM1 is located on the upper left side of the BMPC/2 line control
unit.
NOTICE
Power Supply Failure
Even though the BMPC/2 works with a faulty power supply, it is strongly recom-
mended that you replace the fuse and/or the power supply as soon as possible. If the
second redundant power supply also fails you can no longer control the BMPC/2.

Replace the fuse and/or power supply as soon as possible.