Mitsubishi Electric CITY MULTI PUHY-P-YMF-B Installation Manual page 28

B. Example of a group operation system with multiple outdoor units (Shielding wires and address setting are necessary)
TB3
M1 M2
D
TB3
M1 M2
A Group 1
B Group 3
C Group 5
D Shielded Wire
E 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, M2 and 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 (TB6) 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. On one outdoor unit only, change the jumper connector on the control panel from CN41 to CN40.
f. Connect the terminal S on the terminal block for central control (TB7) for the outdoor unit (OC) for the unit into which the jumper connector
was inserted into CN40 in Step above to the ground terminal
g. Set the address setting switch as follows.
* To set the outdoor unit address to 100, the outdoor address setting switch must be set to 50.
Unit
IC (Main)
IC (Sub)
Outdoor Unit
Main Remote Controller
Sub 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.
28
L
1
A
OC
CN40 IC
(51)
(01)
TB5
M1 M2 S
M1 M2 S
TB7
TB6
(101)
RC
L
5
OC
IC
(52)
(02)
TB5
M1 M2 S
M1 M2 S
TB7
Range
01 to 50 Use the most recent address within the same group of indoor units
Use an address, other than that of the IC (Main) from among the units within the same group of
01 to 50 indoor units
This must be in sequence with the IC (Main)
51 to 100 Use the most recent address of all the indoor units plus 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
L L
2 3
B
IC
(04)
TB5
M1 M2 S M1 M2 S
TB6
(105)
RC
L L
6 7
IC
(03)
TB5
TB5
M1 M2 S M1 M2 S
TB6
(103)
RC
in the electrical component box.
Setting Method
L
4
C
IC IC
(05) (06)
TB5 TB5
M1 M2 S
r
3
TB6
(155)
RC
E
IC
(07)