Panasonic CS-XE9PKUA - Manual (Page 43)

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12.12.1.12 Human Activity Sensor Check Mode
š To enable human activity sensor abnormality check mode:
š During ECONAVI is ON, when CHECK signal received, if either sensors has abnormality, the 4 times abnormality
counter is ignored, ECONAVI Indicator will blink immediately and error code is memorized.
š The unit could operate without ECONAVI or AUTO COMFORT.
š The ECONAVI indicator blinking could be cancelled by pressing ECONAVI button again.
š If the human activity sensor has no abnormality, the CHECK process will end and continue with normal operation.