| 摘要 |
PURPOSE:To enable troubles to be classified into past and present ones and recognized by judging and storing the past and present troubles respectively at a request for diagnosis and indicating selectively the result of judging repeated troubles. CONSTITUTION:Detecting 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 input in a control unit 28. A CPU 280 controls air conditioning and diagnoses troubles to store trouble spots and the number of times of generating troubles in a EEPROM 282. And when the request for diagnosis is input from a control panel 35, a compressor switch is changed over to a diagnosing mode. Thus, the normality/trouble and troubled spots can be selectively indicated in diagnosing past and present troubles. Thus, the present or past trouble spots can be classified and recognized to be properly dealt with. |
