| 摘要 |
PURPOSE:To prevent an errorneous diagnosis and improve the reliability of diagnosing device by storing abnormality generating spots and the number of times of generating abnormalities on the spots to judge and indicate the presence of troubles in the spots in which said number times exceeds a predetermined value when troubles are required to be diagnosed. CONSTITUTION:Respective signals from a room temperature sensor 29, atmosphere temperature sensor 30 duct sensor 31, sun beam sensor 32, water temperature switch 33 and air mix door potentiometer 34 are sent to the input of a control unit 28. A CPU 280 controls air conditioning and diagnoses troubles to store abnormality generating spots and the number of times of generating abnormalities in the spots in a non-volatile EEPROM 282 capably of being rewritten. When a request for diagnosing troubles is input by a control panel 35, the control unit 28 indicates among data stored in the EEPROM 282 spots in which the number of times of troubles exceeds a predetermined value. By this constitution is indicated only original abnormalities such as defective contact as troubles to improve the reliability of the apparatus. |
