Mitsubishi Electric CITY MULTI PUHY-YMC Installation Manual page 30

B. Example of the use of the shielded cable in a system with group operation among multiple outdoor units (Setting of addresses is necessary)
OS
(54)
TB3
M1 M2 S
OS
(53)
TB3
M1 M2 S
Within ( ): Address
a. Be sure to use shielded cable for wiring between the outdoor units (OC and OS) and indoor units (IC), between OC and OC and between IC
and IC.
b. Terminals M1 and M2 and the ground terminal
M1, M2 and S of the transmission line terminal block (TB3)
transmission line terminal block (TB5) of each indoor unit (IC) should be cross wired.
c. Connect the M1 and M2 terminals of the transmission line terminal block (TB5) of the indoor unit IC (Main) with the smallest address within
the same group to the remote control (RC) terminal block (TB6).
d. Connect terminals M1, M2 and S of the centralized control terminal block (TB7) of the variable capacity unit (OC) and the terminals M1, M2
and S of the centralized control terminal block (TB7) of the variable capacity unit (OC) of the other cooling systems.
e. The power supply connector on the main board can be changed from CN41 to CN40 for only one variable capacity unit (OC).
f. Connect the S terminal of the centralized control terminal block (TB7) of the variable capacity unit (OC) which had its power supply connec-
tor connected to CN40 in e to the ground terminal
g. Group settings between multiple cooling systems should be performed after the power is turned on using the remote control (RC) units. For
the setting method, refer to the installation manual for the remote control unit.
Unit
IC (Main)
IC (Sub)
Main remote controller
Sub remote controller
Variable capacity unit
Constant capacity unit
Note:
1. If the address of the variable capacity unit or the constant capacity unit is set at 100, set the address setting switch at either 01 or
50.
2. It is not necessary to set the 100's position on the remote control unit.
3. If the addresses overlap with the variable capacity unit of other cooling systems, select a different unused address.
30
L
1
Group 1
OC
CN40
(51)
(01)
TB3 TB5
M1 M2 M1M2 S
M1M2 S
TB7
Shielded cable
TB6
(101)
RC
L
5
OC
(52)
(02)
TB3 TB5
M1 M2
M1M2 S
M1M2 S
TB7
of the transmission line terminal block (TB3) of each variable capacity unit (OC), terminals
in the electrical equipment panel.
Range
01 to 50 Smallest address of all the indoor units (IC) in the same group
Address other than the IC (Main) of the indoor units in the same group. Use a number
01 to 50
which is in sequence with that of the IC (Main)
101 to 150 Note 2 IC (Main) + 100
151 to 200 Note 2 IC (Main) + 150
51 to 100 Note 1 The smallest address of the indoor units in the same cooling system + 50
51 to 100 Notes 1, 3 Variable capacity unit address + 1
L L
2 3
Group 3
IC IC
(04)
TB13 TB5 TB13
1 2 3 M1M2 S 1 2 3
L L
6
IC IC
(03)
TB13 TB5 TB13
1 2 3 M1M2 S 1 2 3
TB6
(103)
RC
of the constant capacity unit (OS) and terminals M1, M2 and S of the
Setting method
L
4
Group 5
IC IC
(05) (06)
TB5 TB13 TB5
M1M2 S 1 2 3 M1M2 S 1 2 3
r
3
TB6 TB6
(105) (155)
RC RC
(Sub remote
7
controller)
IC
(07)
TB5 TB13
M1M2 S 1 2 3
TB13