Mitsubishi Electric PUMY-P250YBM Technical & Service Manual page 138

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Controller interface
▌1 Occupancy Sensor
The occupancy sensor detects vacancy for energy saving control.
▌2 Brightness Sensor
The brightness sensor detects the brightness of the room
for energy saving control.
▌3 Temperature & Humidity Sensor
The sensor detects the room temperature and the relative humidity.
▌4 LED Indicator
The LED indicator indicates the operation status in different colors.
The LED indicator lights up during normal operation, lights off when
units are stopped, and blinks when an error occurs.
▌5 Touch panel & Backlit LCD
The touch panel shows the operation settings screen.
When the backlight is off, touching the panel turns the backlight on,
and it will stay lit for a predetermined period of time.
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