Section 4: Troubleshooting - CAIRE COMPANION 1000 Technical Manual

TROUBLESHOOTING
B-701964-00 Rev. C
Troubleshooting procedures are listed in Table 4-1. This guide is not all-inclusive, but is
intended to serve as a general outline for solving operational problems. The table
describes symptoms, identifies probable causes, and suggests corrective actions.
When more than one probable cause is identified, the causes are listed in order of most
likely to least likely reasons for failure.
Table 4-1: Troubleshooting
SYMPTOM PROBABLE CAUSE
Low flow at all Low system pressure:
flow control
• gas leak
valve settings
• unsaturated liquid
• primary relief valve
Flow control valve inlet filter
screen dirty
Obstruction or leak in liquid
withdrawal circuit
No flow System is empty
Zero pressure caused by major
gas leak (vent valve open,
relief valve malfunction, etc.)
Flow control valve turned off
Flow control valve inlet filter
screen obstructed
Obstruction in liquid
withdrawal circuit
High product Liquid oxygen leak in
loss rate plumbing
Complete or partial loss of
vacuum
Section
ACTION
Check unit pressure:
• Locate leak; repair as needed.
• Allow liquid to saturate at 22 psig
(152 kPa). May require as long as
30 minutes at no flow.
• Conduct primary relief valve test
and replace if necessary.
Remove and replace flow control
valve inlet filter.
Check liquid withdrawal heat
exchanger tubing for blockage.
Fill unit with liquid oxygen saturated
at 22 psig (152 kPa)
Locate leak; repair as needed.
Set flow control valve at prescribed
rate.
Clean or replace flow control valve
filter screen.
Check liquid withdrawal heat
exchanger tubing for blockage.
Locate leak; repair as needed.
. ..
if NER test fails.
Troubleshooting 4-1
4