Group Operation With 2 Outdoor Units And A Ma Remote Controller - Mitsubishi PUMY-P60NKMU Technical & Service Manual

D. Example of a group operation with 2 or more outdoor units and a MA remote controller.
(Address settings are necessary.)
M1 M2 S M1 M2 S
L
2
L
6
Power Supply
: Group
: Group
: Group
: Shielded Wire
: 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 and M2 on the 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 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. 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 with the earth.
g. Set the address setting switch as follows.
Unit
IC (Main)
IC (Sub)
Outdoor Unit
Main Remote Controller
Sub Remote Controller
MA Remote Controller
h. The group setting operations among the multiple indoor units are done by the remote controller (RC) after the electri-
cal power has been turned on.
OCH502C
OC
(51)
TB3 TB7
L
3
OC
(53)
TB7
TB3
M1 M2 S M1 M2 S
Unit
M1 M2 S
System
controller
M1 M2 S
Range
01 to 00
Use the smallest address within the same group of indoor units.
Use an address, other than the IC (Main) in the same group of indoor units.
01 to 50
This must be in sequence with the 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 IC (Main) address within the same group plus 100.
151 to 200
Set at an IC (Main) address within the same group plus 150.
—
Unnecessary address setting (Necessary main/ sub setting)
L
1
IC IC
m
2
(01) (02)
TB5 TB5
TB15 TB15
M1 M2 S M1 M2 S
1 2 1 2
A B
MA
L
4
IC
IC
(04)
(03)
TB5 TB15 TB5 TB15
M1 M2 S M1 M2 S
1 2
1 2
A B
MA
Setting Method
27
IC IC
m
2
(05) (06)
TB5 TB5
TB15 TB15
M1 M2 S M1 M2 S
1 2 1 2
m
4
A B A B
MA MA
IC
(07)
TB5 TB15
M1 M2 S
1 2