| 摘要 |
Battery test of a backup battery in an emergency informing apparatus is performed. The result of the battery test is displayed to display an amount of remaining energy, an error condition, an empty condition, a replacing timing of the backup battery. The result may be displayed by flickering an LED or an LCD. The event of the battery test is controlled with a timer to prevent a power consumption of the backup battery. That is, the battery test is effected when an engine is started after a predetermined interval has passed from the previous engine start. Moreover, a timer repeatedly generates a timing signal. If the timing signal is generated during a running condition of the engine, the battery test is performed. Moreover, at start-up of the engine if a predetermined interval has passed from the previous battery test, the present battery test is executed. The time interval data may be inputted to change the predetermined interval.
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