Cryo-con Model 24C Appendix C: Troubleshooting Guide
General problems
Symptom Condition
Controller periodically
resets, or resets when
Control key is pressed.
Generally caused by low AC line voltage. Check the AC voltage and
ensure that it matches the instrument’s voltage selection.
AC line voltage selection is described in the Fuse Replacement and
Voltage Selection section.
Complete failure. Possible cause:
1. Blown fuse. Check line voltage selection before installing new
fuses. Review the Fuse Replacement and Voltage Selection
section.
2. Rack mounted instruments: Screws were used in the rack
mount shelf that are too long and have penetrated the
internal circuit board of the controller.
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