Mitsubishi Electric PUMY-P250YBM Technical & Service Manual page 34

D. Example of a group operation with 2 or more outdoor units and an MA remote controller.
(Address settings are necessary.)
L
2
L
5
A : Group
B : Group
C : Group
D : Shielded Wire
E : Sub MA Remote Controller
( ): Address example
a. Always use shielded wire when making connections between the outdoor unit (OC) and the CITY MULTI series indoor
unit (M-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 terminal block of the
CITY MULTI series indoor unit (M-IC).
c. Connect terminals 1 and 2 on the terminal block for MA remote controller line (TB15) on the indoor unit (IC) to the termi-
nal block on the MA remote controller (MA-RC). (Nonpolarized two-wire)
d. Connect together terminals M1, M2 and terminal S on the terminal block for centralized control (TB7) for the outdoor unit (OC).
e. DO NOT change the jumper connector CN41 on outdoor multi controller circuit board.
f. The earth processing of S terminal for the centralized control terminal block (TB7) is unnecessary. Connect the termi-
nal S on the power supply unit with the earth.
g. Set the address setting switch as follows.
Unit
M-IC (Main)
M-IC (Sub)
Outdoor Unit
Main M-NET Remote Controller
Sub M-NET Remote Controller
MA Remote Controller
OCH760
OC
(51)
TB7
TB3
M1 M2 S M1 M2 S
D
L
3
OC
(53)
NO
TB3
TB7
M1 M2 S
M1 M2 S
Power Supply
Unit
M1 M2 S
System
controller
M1 M2 S
Range
01 to 50
Use the smallest address within the same group of indoor units.
Use an address, other than the M-IC (Main) in the same group of CITY MULTI
01 to 50
series indoor units. This must be in sequence with the M-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 M-IC (Main) address within the same group plus 100.
151 to 200
Set at an M-IC (Main) address within the same group plus 150.
—
Address setting is not necessary. (Main/sub setting is necessary.)
L
1
A
M-IC M-IC
m
2
(01) (02)
TB5 TB5
TB15 TB15
M1 M2 S M1 M2 S
1 2 1 2
A B
MA-RC
L
4
M-IC
M-IC
(04)
(03)
TB5 TB15 TB5 TB15
M1 M2 S M1 M2 S
1 2
1 2
A B
MA-RC
B
Setting Method
34
C
M-IC M-IC
m
2
(05) (06)
TB5 TB5
TB15 TB15
M1 M2 S M1 M2 S
1 2 1 2
A B A B
MA-RC MA-RC
E
M-IC
(07)
TB5 TB15
M1 M2 S
1 2