Cryomech PT415 - Troubleshooting and Maintenance

Operation
7-6
7.7 Troubleshooting
7.7.1 System will not start
SYMPTOM
System will not start.
POSSIBLE
CAUSE
1) No power supplied to the compressor package.
2) Circuit breakers off.
3) “Compressor Error” message displayed on display screen.
REMEDY
1) Check the power supply to the system and verify that it meets the
requirements outlined in Section 5.
2) Make certain both circuit breakers, located on the front panel of
the compressor package, are on.
3) Refer to Section 7.7.5 for error message diagnostics.
7.7.2 System 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 compressor package.
2) Aeroquip connector(s) not completely tightened.
3) High and low pressure helium flex lines reversed.
REMEDY
1) Turn off the compressor and connect the cold head motor cord to
the cold head and/or to the compressor package.
2) Tighten all Aeroquip connectors.
3) Verify that one of the helium flex lines connects the high pressure
port on the compressor package to the high pressure port on the
cold head and that the other helium flex line connects the low
pressure ports.