Refrigeration – With indicator or tester – Operatively correlated with automatic control
Patent
1984-05-14
1985-08-20
Tanner, Harry B.
Refrigeration
With indicator or tester
Operatively correlated with automatic control
62201, 62226, F25B 4900
Patent
active
045355983
ABSTRACT:
A method and control system are disclosed for checking and verifying sensor operation in a refrigeration system. A microcomputer control system determines whether a signal provided by the sensor is within normal limits prior to startup of the refrigeration system. Also, the microcomputer system verifies an out of bounds sensor signal provided to the microcomputer system from the sensor during operation of the refrigeration system by intermittently monitoring the sensor to determine whether a preselected consecutive number of out of bounds signals are provided to the microcomputer control system from the sensor. If the microcomputer control system determines that the signal provided by the sensor is not within normal limits prior to startup of the refrigeration system, or if the microcomputer system verifies an out of bounds signal provided by the sensor during operation of the refrigeration system, then the microcomputer control system generates an alarm signal to abort the startup or shut down the operation of the refrigeration system, respectively.
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Carrier Corporation
Miller Douglas L.
Tanner Harry B.
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