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How does the S60FSD and the S44CSD know when to self-test?

April 26, 2017s44csd s60fsd self-test

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How does the S60FSD and the S44CSD know when to self-test?

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The unit contains a microcontroller that schedules testing. These units are designed to self-test when the room is not in use (i.e., when the AC ballast is not in use). The S60FSD and the S44CSD will delay testing for two hours after the lights have been turned off. The delay maximum is 72 hours.