Section 8 Troubleshooting
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ULVAC CRYOGENICS INCORPORATED
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Controller Fault (Controller fault)
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A control module constantly checks the hardware to maintain safe operation. When a
component fault occurs in a part such as a magnetic contact (MC) during operation, this
alarm is activated. Loose wiring in the controller could be a cause of the alarm also.
Please contact our Service Engineering Division or the nearest customer support
center for replacement and adjustment of the controller.
Other (Status whereby both RDY and STS indicators are OFF)
In normal operation, RDY indicators light up and STS indicators are off. If both RDY
and STS indicators are OFF, it means there is a fault other than those listed above.
If the indicator shows the same status after pushing “RST” button and turning OFF
and ON the power of the compressor, please contact our Service Engineering
Division or the nearest customer support center for replacement and adjustment of
the controller immediately.
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