Mitsubishi Electric PUHY-P200 Service Handbook page 28

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.
Connecting of shielded wire:
The same as 1. (1)
b. Centralized control transmission line
Apply jumper wiring between M1, M2 terminals of centralized control transmission line terminal blocks (TB7) on
each OC. For one OC only, replace the power selecting connector (CN41) with (CN40).
❉ Make sure to use shielded wire.
Connecting of shielded wire:
Apply jumper wiring to connect the shielded earth to S-terminal of the terminal block (TB7) on each OC. Connect
Sterminal of the terminal block (TB7) on the one OC with (CN40) replaced 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
The same as 1. (2)
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
OC
unit within refrigerant system
+ 50
51 ~ 100
OS Oundoor unit address + 1
- 26 -
Caution
• Set the address not to be
overlapped with the indoor
unit address.
–
• When setting address to
"100," make it "50."
) of the electrical
Factory
setting
00
00
Main
00