Automatic fault diagnostic apparatus for a heat pump air conditioning system
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United States of America Patent
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-
Apr 26, 1983
Grant Date -
N/A
app pub date -
Oct 14, 1980
filing date -
Oct 14, 1980
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Microprocessor controlled apparatus is provided for automatically diagnosing faults in a heat pump system. Temperature sensors located at strategic points in the system are read periodically in accordance with a preprogrammed diagnostic routine. Temperature measurements preferably representing comparison of two temperature readings that produce temperature differentials outside pre-established tolerance limits are stored with a fault identification representative of the corresponding fault measurement. A service technician can read the fault data from storage by activation of control means for that purpose whereby the nature of the causative fault or faults can readily be determined.
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