Cryomech CPA289C, Installation And Operation Manual

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Operation
7-6
7.7 Troubleshooting
7.7.1 Helium compressor package will not start
SYMPTOM System will not start.
POSSIBLE
CAUSE 1) No power supplied to the helium compressor package.
2) Circuit breakers off.
REMEDY
1) Check the power supply to the system and verify that it meets the
requirements outlined in Section 5.
2) Make certain the circuit breaker, located on the front panel of the helium
compressor package, is on.
7.7.2 Helium compressor package starts, no pressure fluctuation
SYMPTOM System starts, no bounce in the pressure gauges, no refrigeration.
POSSIBLE
CAUSE 1) Cold head motor cord not connected to the cold head and/or to the helium
compressor package.
2) Aeroquip connector(s) not completely tightened.
3) High and low pressure helium flex lines are reversed.
REMEDY 1) Turn off the helium compressor package and connect the cold head motor cord
to the cold head and/or to the helium compressor package.
2) Tighten all Aeroquip connectors.
3) Verify that one of the helium flex lines connects the high pressure port on the
helium compressor package to the high pressure port on the cold head and that
the other helium flex line connects the low pressure ports.
7.7.3 System has shut itself down. Power switch light off
SYMPTOM
System has shut itself down.
POSSIBLE
CAUSE
1) Circuit breaker tripped.
2) Interruption of the power supply to the helium compressor package.
3) “Compressor Error” message displayed on front panel screen.
REMEDY 1) Reset the circuit breaker on the front panel of the helium compressor package.
See Section 5.
2) Check the power supply to the system and verify that it meets the requirements
outlined in Section 5.
3) Refer to Section 7.7.5 for error message diagnostics.