Air-conditioner control system

A method of adjusting a control system for controlling actuator means and display means of an air conditioner, said control system comprising:

• (a) a plurality of temperature-data input terminals;
• (b) reference-voltage generating means including a variable resistor, for generating an adjustable reference voltage;
• (c) an operational amplifier having an inverting input terminal, a noninverting terminal and an output terminal, said output terminal and said inverting input terminal being connected to each other through a negative feedback resistor, wherein said temperature-data input terminals are connected to said inverting input terminal through respective input resistors, wherein said reference voltage from said reference-voltage generating means is inputted to said noninverting input terminal;
• (d) an A/D converter for converting an output voltage from said operational amplifier to digital data;
• (e) mode-signal generating means for sending a mode signal to a below-mentioned microcomputer;
• and
• (f) the microcomputer including:
• (i) judging means for judging whether the air conditioner is in a normal control mode or an adjusting mode, on the basis of said mode signal from said mode-signal generating means,
• (ii) normal-control-mode executing means for outputting a control signal representative of a current air-conditioning state, to said display means and for outputting a control signal to said actuator means of said air conditioner on the basis of said digital data from said A/D converter when said normal-control-mode executing means receives a judgment signal from said judging means indicative of said normal control mode, and
• (iii) adjusting-mode executing means for outputting a control signal representative of the output voltage from said operational amplifier, to said display means, on the basis of said digital data from said A/D converter when said adjusting-mode executing means receives a judgment signal from said judging means indicative of said adjusting mode,
• said method comprising the steps of:
• (v) connecting a plurality of standard resistors respectively to said temperature-data input terminals;
• (w) outputting the mode signal from said mode-signal generating means, representative of said adjusting mode, to said microcomputer;
• (x) causing said display means to display said output voltage from said operational amplifier on the basis of said control signal from said microcomputer;
• and
• (y) adjusting said variable resistor of said reference-voltage generating means so as to bring the output voltage from said operational amplifier displayed on said display means, to a predetermined voltage.