Automatic fault diagnostic apparatus for a heat pump air conditi

Details Automatic fault diagnostic apparatus for a heat pump air conditi Automatic fault diagnostic apparatus for a heat pump air conditi

1980-10-14

1983-04-26

Wise, Edward J.

Boots, shoes, and leggings

165 11R, 364551, G01M 1900

Patent

active

043815499

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.

REFERENCES:
patent: 3890836 (1975-06-01), McKenzie et al.
patent: 3998088 (1976-12-01), Kazangey
patent: 4146085 (1979-03-01), Wills
patent: 4234926 (1980-11-01), Wallace et al.
patent: 4262736 (1981-04-01), Gilkeson et al.
patent: 4296409 (1981-10-01), Whitaker et al.
patent: 4296727 (1981-10-01), Bryan

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