| 摘要 |
PROBLEM TO BE SOLVED: To solve the problem of a method for controlling input of power source of an air conditioner that the power source must be reclosed manually because negative phase and open phase are detected by reclosing power source manually after the power source is set and a significant labor and time are spent or the power source is possibly missed to be reclosed. SOLUTION: At step S1, input power source is set from three-phase to single phase or reversely. When setting is finished, control circuit of an air conditioner is restarted (rebooted) (step S2) and then negative phase or open phase of the input power source is detected (step S3). When negative phase or open phase is detected, a forced/abnormal LED (red) 6 is lighted and the processing is completed in case of normality (steps S4-S6). |
