32
OCH634C
D. Example of a group operation with 2 or more outdoor units and a MA remote controller.
(Address settings are necessary.)
Examples of
Transmission
Cable
Wiring
Wiring Method
Address Settings
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 centralized control (TB7) for the outdoor unit (OC).
e. DO NOT change the jumper connector CN41 on 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.
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.
i. When connecting PWFY unit
• For PWFY series, do not set up group connection with other indoor units.
• LOSSNAY is not available for use with PWFY series.
• Use a WMA remote controller for operation of PWFY series.
For more details, refer to the service manual for PWFY series.
Unit
Range
Setting Method
IC (Main)
01 to 00
Use the smallest address within the same group of indoor units.
IC (Sub)
01 to 50
Use an address, other than the IC (Main) in the same group of indoor units.
This must be in sequence with the IC (Main).
Outdoor Unit
51 to 100
Use the smallest address of all the indoor units plus 50.
The address automatically becomes “100” if it is set as “01–50”.
Main Remote Controller
101 to 150
Set at an IC (Main) address within the same group plus 100.
Sub Remote Controller
151 to 200
Set at an IC (Main) address within the same group plus 150.
MA Remote Controller
—
Address setting is not necessary. (Main/ sub setting is necessary.)
A
B
C
E
D
TB7
IC
(51)
TB15
TB15
TB15
MA-RC
(01)
IC
TB5
(03)
IC
TB5
TB5
(02)
IC
TB5
(04)
IC
(05)
IC
(07)
IC
(06)
L
1
MA-RC
MA-RC
OC
(53)
OC
1
m
4
3
Power Supply
Unit
L
3
L
7
L
4
m
3
1
1
2
2
TB3
A
: Group
B
: Group
C
: Group
D
: Shielded Wire
E
: Sub Remote Controller
( ): Address example
m
m
m
m
m
m
M1 M2 S M1 M2 S
TB7
M1 M2 S
M1 M2 S
TB3
M1 M2 S
M1 M2 S
M1 M2 S
M1 M2 S
M1 M2 S
A B
1 2
1 2
M1 M2 S
1 2
1 2
TB15
TB5
M1 M2 S
1 2
TB15
TB5
M1 M2 S
1 2
A B
A B
TB15
TB5
M1 M2 S
1 2
TB15
A B
L
2
L
6
System
controller
D
NO
MA-RC
