| 摘要 |
PROBLEM TO BE SOLVED: To display a DC voltage value, fed to an inverter, at a display part by a method wherein a refrigerating cycle and the operation state of the inverter are detected, which operation state is displayed is displayed, and computation is performed by a computing means in the set operation state. SOLUTION: A signal converter 14 converts a DC voltage smoothed by a smoothing capacitor 9 into an electric signal which can be decoded by a microcomputer 12. Through operation of the microcomputer 12, a signal for a DC voltage converted by a signal converter 14 is first inputted and from the voltage signal, a DC voltage value is computed. The set stage of a display part setter 16 is then decided and when display of a DC voltage is set, a computed DC voltage value is displayed at a display part 15. When display of the DC voltage value is not set, the display part 15 is switched to a display content set by the display setter and a DC voltage signal is inputted again. This constitution displays the DC voltage value at the display art and facilitates confirmation. |
