galaxy 3-520 comms fails on sia

hi, I keep getting comms fails 300 seconds after logging on engineering.

I'm using sia level 3 solely for sending open/close signals for groups a5,a6. This means everything is off but 10=setting. a5,a6 have different account numbers. The comms fail time is 300 seconds.

I've no idea what the panel is trying to send (if anything) or where it is trying to send it to! Any ideas?

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