Refrigeration – With indicator or tester – Diverse function indicators or testers
Patent
1987-12-16
1989-05-09
Tanner, Harry B.
Refrigeration
With indicator or tester
Diverse function indicators or testers
62129, 165 111, 236 94, F25B 4900
Patent
active
048277304
ABSTRACT:
A troubleshooting apparatus counts the number of times an abnormality occurs whenever each diagnosed portion of an automobile air-conditioning system repeats an abnormal and a normal status, stores each diagnosed portion in which an abnormality is detected and the number of times the abnormality of each diagnosed portion occurs in a nonvolatile memory, recognizes each diagnosed portion having the number of times the abnormality exceeds a predetermined value at the time of troubleshooting as a fault, and recognizes each diagnosed portion having an abnormality that occurs at the time of troubleshooting as a fault. Abnormalities that occur in conjunction with the dismounting and remounting of diagnosed portions during checking processes are absorbed in the number of times the abnormality occurs within the predetermined value so that a wrong diagnosis can be avoided. Moreover, each diagnosed portion having the number of times the abnormality exceeds the predetermined value and each diagnosed portion having an abnormality that occurs during the diagnostic process can be distinguished from each other. Consequently, check and repairs can be based on an understanding of whether or not the abnormality lacks repeatability such as an imperfect contact and a half-disconnection.
REFERENCES:
patent: 4432210 (1984-02-01), Saito
patent: 4490986 (1985-01-01), Paddock
patent: 4535598 (1985-08-01), Mount
patent: 4653280 (1987-03-01), Hanson et al.
patent: 4663940 (1987-05-01), Suzuki et al.
Anan Yoshiaki
Doi Shigetoshi
Iida Katsumi
Nagaoka Hirofumi
Sakurai Yoshihiko
Diesel Kiki Co. Ltd.
Mazda Motor Corporation
Tanner Harry B.
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