Problem: Star korbar sathe sathe fault indicator jole. long beep dai.

Before the solution this ups basic principle here: UPS er sob mosfer gate voltage 5Volt thakbe. Jodi board khule voltage test korte hoi tobe oboshoi 2ta fan e connect kore power abong mosfer panel j temperature sensor thake setio lagiye terpor power dite hobe. na hole fan & temperature error dibe start korbar sathe sathe.

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