| 摘要 |
PROBLEM TO BE SOLVED: To suppress impairment of comfort due to failure detection, even if failure detection is performed in an arbitrary time zone.SOLUTION: An apparatus controller has an illuminance comparison unit for comparing a first illuminance detected by an illuminance detector disposed at a position corresponding to one illumination apparatus, out of a plurality of illumination apparatus for illuminating the space, with a second illuminance detected by the illuminance detector, while changing the lighting state of the one illumination apparatus from the lighting state when the first illuminance is detected, and a failure determination unit for determining whether or not the one illumination apparatus is faulty depending on the comparison results.SELECTED DRAWING: Figure 16 |
