| 摘要 |
PURPOSE:To make a fitting adjustment unnecessary and make a self-diagnoses possible by allowing a memory to store position data of both ends of a potentiometer provided for sensing the opening degree of an air mix door, in an air- conditioning apparatus with a micro-computer. CONSTITUTION:An RAM33 is allowed to store data of both sides of the opening degree of a door, that is, those in maximum cooling and maximum heating, by moving an air mix door 17 in the total stroke. The present position is calculated by substracting the data of the position in maximum cooling from the data of a potentiometer 41 and dividing thus substracted value by the value obtained by subtracting the data of the position in maximum cooling from the data of the position in maximum heating. If a change of the opening degree corresponding to the full stroke change is below the prescribed value owing to looseness of a fitting screw etc. of the potentiometer 41, the cause shall be defined to be a kind of trouble, and if the error is out of the allowable range, and the full stroke data shall be defined again. |
