Mitsubishi Electric City Multi PUMY-P36NHMU Technical & Service Manual page 28

B. Example of a group operation system with 2 or more outdoor units and a M-NET remote controller.
(Shielding wires and address settings are necessary.)
M1 M2 S
Power Supply
: Group 1
: Group 3
: Group 5
: Shielded Wire
: Sub Remote Controller
( ): Address
a. Always use shielded wire when making connections between the outdoor unit (OC) and the indoor unit (IC), as well
for all OC-OC, and IC-IC wiring intervals.
b. Use feed wiring to connect terminals M1 and M2 and the ground terminal on the transmission cable terminal block
(TB3) of each outdoor unit (OC) to terminals M1 and M2 on the terminal S on the transmission cable block of the
indoor unit (IC).
c. Connect terminals M1 and M2 on the transmission cable terminal block of the indoor unit (IC) that has the most
recent address within the same group to the terminal block on the remote controller (RC).
d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor
unit (OC).
e. DO NOT change the jumper connector CN41 on MULTI controller board.
f. The earth processing of S terminal for the centralized control terminal block(TB7) is unnecessary.
Connect the terminal S on the power supply unit with the earth.
g. Set the address setting switch as follows.
Unit
IC (Main)
IC (Sub)
Outdoor Unit
Main Remote Controller
Sub Remote Controller
MA Remote Controller
h. The group setting operations among the multiple indoor units is done by the remote controller (RC) after the electrical
power has been turned on.
OC
(51)
TB3
M1M2 S
M1 M2 S
TB7
OC L
3
(53)
TB3
M1M2 S
TB7
Unit
M1M2S
DV 12V
G-50A
M1M2 S
Range
01 to 00
Use the smallest address within the same group of indoor units.
Use an address, other than that of the IC (Main) in the same group of indoor
01 to 50
units. This must be in sequence with the IC (Main).
Use the smallest address of all the indoor units plus 50.
51 to 100
*The address automatically becomes "100" if it is set as "01 - 50".
101 to 150
Set at an IC (Main) address within the same group plus 100.
151 to 200
Set at an IC (Main) address within the same group plus 150.
—
Unnecessary address setting (Necessary main/ sub setting)
L
1
IC IC
(01) (02)
TB5 TB5
M1 M2 S M1 M2 S
A B
(101)
RC
L
4
IC
IC
(04)
(03)
TB5 TB5
M1 M2 S
M1 M2 S
A B
(104)
RC
Setting Method
28
IC IC
(05) (06)
TB5 TB5
M1 M2 S M1 M2 S
3
A B A B
(105) (155)
RC RC
IC
(07)
TB5
M1 M2 S