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Home Service & Support Troubleshooting Commercial Air Conditioner The central contr...

Question: The central controller connect the ODU via BusA and BusB, but all IDUs can’t be displayed on the controller.

Answer:
Firstly, checked the cable connection. There are no problem about it.
Secondly, checked the dip switch setting. The BM4_1&2 are set to off& off, they should be set on & off due to need central protocol.
So, change the dip switch setting. The central controller works normally.
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