Mitsubishi Electric PUMY-P125VMA1 Technical & Service Manual page 32

D. Example of a group operation with two or more outdoor units and a MA remote controller.
(Shielding wires and address settings are necessary.)
OC
CN40 CN41
(051)
TB3
M1 M2 S
Shielded wire
OC
CN41
(052)
TB3
M1 M2 S
( ) 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, M2 and S and the ground terminal on the transmission cable terminal block
(TB3) of each outdoor unit (OC) to terminals M1, M2 and S on the transmission cable block (TB15) 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 (MA).
d. Connect together terminals M1, M2 and terminal S on the terminal block for central control (TB7) for the outdoor
unit (OC).
e. Use the grounded wire to connect the S-terminal on the transmission terminal of the outdoor unit (OC) and the
grounded terminal for the electrical components box.
f. On one outdoor unit only, change the jumper connector on the control panel from CN41 to CN40.
g. 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
h. Set the address setting switch as follows.
Unit
IC (Main)
IC (Sub)
Outdoor Unit
L
1
Between
terminal blocks
Group 1
IC
(001)
TB5 TB15
M1 M2 S 1 2
M1 M2 S
TB7
MA
L L
5
IC
(002)
TB5 TB15
M1 M2 S 1 2
M1 M2 S
TB7
Range
Use the most recent address within the same group of indoor units.
001 to 050
Use an address, other than that of the IC (Main) from among the units within
001 to 050
the same group of indoor units. This must be in sequence with the IC (Main).
051 to 100 Use the most recent address of all the indoor units plus 50.
L L
2 3
Group 3
IC
(004)
TB5 TB15
M1 M2 S 1 2
L
6 7
IC
(003)
TB5 TB15
M1 M2 S
1 2
MA
Setting Method
32
L
4
Group 5
IC IC
(005) (006)
TB5 TB15 TB5 TB15
M1 M2 S 1 2 M1 M2 S 1 2
R
3
MA MA
Sub remote
controller
IC
(007)
TB5 TB15
M1 M2 S 1 2
; in the electrical component box.