Mitsubishi Electric PUMY-P250YBM Technical & Service Manual page 38

Example of a system using Branch Box and A-Control indoor unit
L
5
L
6
A
L
7
A: Shielded wire
( ): Address example
a. Always use shielded wire when making connections between the outdoor unit (OC) and the Branch Box 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.
c. Connect terminals 1 and 2 on the transmission cable terminal block (TB5/TB15) of the A-control indoor unit (A-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
OCH760
OC
(51)
L
1
TB3
TB7
M1 M2 S M1 M2 S
A
L
2
OC
(53)
TB7
TB3
A
M1 M2 S M1 M2 S
Power
Supply
Unit
M1 M2 S
System
controller
L
3
M1 M2 S
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.
L
8
Branch Box TB3A TB TB5/TB15
S1 S1 A-IC
S2 S2
(01)
S3 S3
TB5 TB3B TB TB5/TB15
M1 S1 S1 A-IC
S2 S2
M2 (02)
S3 S3
S
TB3C TB TB5/TB15
S1
S1 A-IC
S2
S2
(03)
S3
S3
TB3D TB
S1 S1 A-IC
S2 S2
(04)
S3 S3
TB3E
TB
S1 S1 A-IC
S2
S2
(05)
S3
S3
TB3A TB TB5/TB15
Branch Box
S1
S1 A-IC
S2
S2
(06)
S3
S3
TB5 TB3B TB
M1 S1 S1 A-IC
M2 S2 S2
(07)
S3 S3
S
TB3C
TB
S1
S1 A-IC
S2
S2
(08)
S3
S3
TB5
M1 M-IC
M2
(09)
S
L
4
TB5
M1 M-IC
M2
(10)
S
Setting Method
-
38
m
1
1 A
MA-RC
2 B
1 A
MA-RC
2 B
1
A
MA-RC
2 B
WL-RC
WL-RC
1 A
MA-RC
2 B
WL-RC
WL-RC
TB15
1 A
MA-RC
2 B
TB15
1 A
MA-RC
2 B