Haier MRV II Instruction Manual page 94

and cancel the communication with wired controller, the detailed
method is as follows:
Set the jumper J19 on indoor PCB:
CN30 on indoor PCB:
Note: if making central control for more than one indoor, please must
connect the wired controller.
1.3.2 Setting method in group control
1）When making group control with wired controller, the indoor unit
connected to the wired controller is the master unit. Use the rotary switch
SW01 to set the indoor unit address, for master unit, SW01 is at 0, while the
rotary switch SW01 of the slave unit will be at the other digits except 0, and
can not repeat
2) Wiring method of serial communication wires between wired
controller and indoors
Connect A, B, C on the wiring block of the serial communication wire
between wired controller and indoor master unit; Only connect B, C on the
wiring block of the serial communication wire between indoor slave unit and
J19
connected
disconnected remote contr ol
CN30
connected
disconnected remote contr ol
function
wired control
function
wired control
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Part 3