Mitsubishi Electric PUHY-P200 Service Handbook page 32

a. Indoor/outdoor transmission line
Apply jumper wiring connection between M1, M2 terminals of the indoor/outdoor transmission line terminal block
(TB3) on the outdoor unit (OC) and that of indoor/outdoor transmission line terminal block (TB5) on each indoor
unit (IC). (with non-polarity two wires)
❉ Make sure to use shielded wire.
Connection of shielded wire:
For the grounding of shielded wire, apply jumper wiring between the grounding screw of OC, S-terminal of the
terminal block (TB3), and S-terminal of the system controller.
b. Centralized control transmission line
Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on
each OC. On one OC only, replace the power selecting connector (CN41) with (CN40). Set the centralized control
switch (SW2-1) on the main board of all outdoor units to "ON."
❉ Make sure to use shielded wire.
Connection of shielded wire:
Apply jumper wiring to connect the shielded earth to S-terminal of the terminal block (TB7) on each OC. Connect S-
terminal of the terminal block (TB7) on one OC with (CN40) connected to the earth screw (
parts box.
c. MA remote controller wiring
The same as 1. (1)
For 2-remote controller operation:
The same as 1. (1)
For indoor unit group operation:
The same as 1. (2)
d. LOSSNAY connection
Apply jumper wiring to connect A, B terminals of the terminal block (TB5) on (IC) to the terminal block (TB5) on the
indoor/outdoor transmission line terminal block (TB5) on Lossnay (LC). (with non-polarity two wires)
❉ The interlocking registration of the indoor unit and Lossnay is required from the system controller. (For the
registration method, see the instruction manual of system controller.)
To connect ON/OFF remote controller only, interlocking registration from the remote controller is required.
e. Switch setting
Address setting is required as follows.
Order Unit or controller
Main unit
1 Indoor unit
Sub unit
2 LOSSNAY
Main unit
MA remote
3
controller
Sub unit
4 Outdoor unit
5 Sub unit Hex. unit
Wiring method Address setting method
•
Address
Setting method
setting range
• Set the lowest address within
a same group to the indoor unit
desired to be the main unit.
IC 01 ~ 50
Set to the main unit address
within a same group in serial or-
der. [Main unit +1, +2, +3,]
Set any address after setting all
LC
01 ~ 50
indoor units.
MA
Not required
Set by the main/sub selector
MA
Sub unit switch .
The lowest address of indoor
unit within refrigerant system
OC
+ 50
51 ~ 100
OS Oundoor unit address + 1
- 30 -
Caution
• Set the address not to be
overlapped with the indoor
unit address.
–
• Conduct initial setting by the
system controller with the
same setting detail of indoor
unit applied in MA remote
controller wiring.
• When setting address to
"100," make it "50."
) of the electrical
Factory
setting
00
00
Main
00