Mitsubishi Electric CITY MULTI PUMY-P112VKM5 Technical & Service Manual page 43

F. Example of a system using Branch Box, A-Control indoor unit, and CITY MULTI series indoor unit.
a. Always use shielded wire when making connections between the outdoor unit (OC) and the Branch Box or CITY
MULTI series indoor unit (M-IC), as well for all OC-OC 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 (TB5)
of the Branch Box or CITY MULTI series indoor unit (M-IC).
c. Connect terminals 1 and 2 on the transmission cable terminal block (TB5/TB15) of the A-control indoor unit (A-IC) or
CITY MULTI series indoor unit (M-IC), to the terminal block on the MA remote controller (MA-RC).
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 MULTI controller 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 to the earth.
g. Set the address setting switch as follows.
Unit
M-IC
A-IC
Branch Box
Outdoor Unit
MA Remote Controller
OCH740
OC
(51)
L
TB3
TB7
M1 M2 S M1 M2 S
L
5
A
OC
(53)
TB7
L
6
TB3
M1 M2 S M1 M2 S
Power
A
Supply
Unit
M1 M2 S
L
7 System
controller
L
M1 M2 S
A: Shielded wire
( ): Address example
Range
01 to 50
According to the set address of connected Branch Box, set the A-IC addresses
sequentially by SW1, SW11, SW12 on Branch Box.
01 to 50
(For example, when the Branch Box address is set to 01, set the A-IC
addresses to 01, 02, 03, 04 and 05.)
Use a number within the range 1-50, but it should not make the highest
01 to 50
address of connected A-IC exceed 50.
Use the smallest address of all the Branch Box plus 50.
51 to 100
The address automatically becomes ˝100˝ if it is set as ˝01–50˝.
-
Address setting is not necessary.
TB3A
Branch Box
S1
S2
S3
1
TB5
TB3B
M1 S1
M2 S2
S S3
TB3C
S1
S2
S3
TB3D
S1
L
S2
2
S3
TB3E
S1
S2
S3
A
Branch Box TB3A
S1
S2
S3
TB5 TB3B
S1
M1
S2
M2
S3
S
TB3C
S1
S2
3
S3
L
4
Setting Method
43
L
8
m
1
TB TB5/TB15
1 A
S1 A-IC
MA-RC
2 B
S2
(01)
S3
TB TB5/TB15
S1 A-IC 1 A
MA-RC
S2 2 B
(02)
S3
TB TB5/TB15
1
S1 A-IC A
MA-RC
2 B
S2 (03)
S3
TB
S1
A-IC
WL-RC
S2
(04)
S3
TB
S1 A-IC
WL-RC
S2
(05)
S3
TB TB5/TB15
S1 A-IC A
1
MA-RC
S2 2 B
(06)
S3
TB
S1
A-IC
WL-RC
S2
(07)
S3
TB
S1 A-IC
WL-RC
S2
(08)
S3
TB5 TB15
1 A
M1 M-IC
MA-RC
2 B
M2
(09)
S
TB5 TB15
A
M1 M-IC 1
MA-RC
M2 2 B
(10)
S
-