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It means that Card #16 is either improperly seated or failed.

Observation: If you're using a Simplex 4100u fire protection system to protect your

property, or even worse, if you've sold it or installed it for someone else's protection,

then you really need to take the time to read the manual and understand how the

thing works.

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14y ago

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Q: What does card 16 interface abnormal mean on a simplex 4100u panel?
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