Bruker CryoProbe User Manual

76 (107) BRUKER CryoProbe User Manual
Troubleshooting
Insufficient vacuum 7.5.2
If the CryoController reports
Insufficient vacuum and stops the vacuum
pumps, or if the vacuum pumps sound strange,
- the vacuum bellows may not be properly connected at the CryoProbe or
at the Transferline Support,
- the Vacuum Adapter may not be locked tightly to the CryoProbe bottom
or its o-ring might be bad,
- the Vacuum Plug may sit inside the CryoProbe instead of being drawn
out with the Vacuum Adapter,
- the o-rings in the vacuum bellows connections might be bad,
- if you hear a squeal sound that comes and goes, the turbo vacuum pump
may not come to speed.
General vacuum test
Press
COOL DOWN and wait for diagnostic messages.
He Compressor does not run 7.5.3
The He Compressor is started approx. 15 min after a cool-down was initiated. At
the same moment,
COOL DOWN will stop flashing and remains steady.
Table 7.2. Troubleshooting the He Compressor
Symptom Possible cause Elimination
M
AIN POWER and DRIVE
remain O
N when
switched but the He
Compressor does not
start after He flushing is
finished.
1. No mains power.
2. Abnormal room temperature.
1. Check mains wiring, fuses, and
circuit breakers.
2. Maintain room temperature at 5° -
35°C.
M
AIN POWER remains ON
but D
RIVE flips back to
O
FF.
1. Abnormal static He pressure. 1. Adjust He supply pressure.
He Compressor stops
after several minutes of
operation and D
RIVE
goes O
FF.
1. Abnormal operating He pressure.
2. air-cooled only: Insufficient cool-
ing of compressor operating
room triggers thermal protection.
3. air-cooled only: Air flow for He
Compressor is blocked.
4. air-cooled only: Air flow through
the He Compressor unit is
blocked by dirty fin.
5. air-cooled only: Fan does not
operate.
6. water-cooled only: Insufficient or
no water cooling triggers the ther-
mal protection.
1. Adjust He supply pressure or
charge He as required.
2. Check room temperature and
cooling system of compressor
operating room.
3. Check the space around the He
Compressor.
4. Clean the heat exchanger fin.
5. Check fuses (see "Fuses and
reset buttons" on page 73), if
OK then replace fan.
6. Confirm that cooling water is flow-
ing at the proper flow rate.

Bruker CryoProbe Specifications

General

Brand	Bruker
Model	CryoProbe
Category	Laboratory Equipment
Language	English