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Troubleshooting
Thermo Fisher Scientific
This section provides a brief guide to identifying the cause of some
common problems that may be encountered. It should be noted that
the majority of problems are due to air supply faults or enclosure
leakage and that problems with purge control equipment are rare.
Ensure that
observed before starting any work.
Check that the correct test equipment is available before making any
adjustments that cannot be reversed. Manufacturer's documentation
should be consulted in parallel with this document.
Table A–8. Troubleshooting
Symptom*
1. Purge sequence fails to
start, enclosure power off,
purge timer does not run.
"Safety Information" (Chapter 2)
Possible Cause
a. Air supply pressure low or
line capacity inadequate.
b. Enclosure leaky. Cannot
be sufficiently pressurised.
c. Air inlet filter blocked.
d. Power off to purge
controller.
e. Pressure sense faulty or
set point incorrectly
adjusted.
f. Other controller fault.
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
Hazardous Area Operation
Troubleshooting
has been read and
Action
Check pressure at
instrument. Increase line
capacity (bigger diameter
line, shorter line length, or
different air source).
Check enclosure pressure.
Check recently removed
panels, and inspect door
seals.
Carry out enclosure leak
check procedure.
Filter may block after
extended operation period
or due to oil or debris in the
air supply. Remove and
clean.
Note: A contaminated air
supply can cause problems
to the instrument in the
main enclosure. Rectify
fault and clean lines before
restarting.
Check power supply to
controller Note: Fuses in
main power switch box.
Check for contamination
around vent (internal sense
port could be blocked).
Check enclosure pressure,
set point function, and
adjustment.
Refer to manufacturer's
documentation or consult
factory.
A-23
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