York R-410A - Wiring Method of CCM and NIM

Controller
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3) The shield cable should try to avoid middle transfer connector. If have connectors, it had
better to connect by terminal block.
4) After finishing connection, do not use Megger to have the insulation check to the signal wire.
3. Wiring Method of CCM and NIM
The communication port between CCM and NIM has polarity, and terminal X, Y, E must
connect to the responding X, Y, E. It is the same for the port between CCM and module of
Rs485 to Rs232.