emaq
Member level 4
What is the standard communication protocol between the in-door and out-door unit of a DC-inverter air-conditioner used by most of the manufacturers?
I saw there is only one wire with 0-20V signal w.r.t. circuit ground (+20V for 1's and 0 for 0's with reference at +10V).
I saw there is only one wire with 0-20V signal w.r.t. circuit ground (+20V for 1's and 0 for 0's with reference at +10V).