Mitsubishi Electric PUHY-P250YNW-A Service Handbook page 43

[2-7 Example System with an MA Remote Controller ]
(4) Wiring method
1) Indoor/outdoor transmission line
Same as 2-7-1
2) MA remote controller wiring
When 2 remote controllers are connected to the sys-
tem
When two remote controllers are connected to the sys-
tem, connect terminals 1 and 2 of the terminal block
(TB15) on the indoor unit (IC) to the terminal block on the
MA remote controllers (option).
(5) Address setting method
Procedures Unit or controller
1 Indoor
unit
2 Outdoor unit
3 MA
remote
controller
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Units are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).
16
- chapter 2
Address
setting range
Main unit IC 01 to 50
Sub unit IC 01 to 50
OC 51 to 100
OS
Main MA No settings re-
remote quired.
controller
Sub MA Sub
remote remote
controller controller
Set the Main/Sub switch on the connected MA remote
controllers (option) to SUB. (See the installation manual
for the MA remote controller for the setting method.)
3) Switch setting
Address setting is required as follows.
Setting method
Assign a sequential odd number
starting with "01" to the upper in-
door controller.
Assign sequential numbers start-
ing with the address of the main
unit in the same group. (Main
unit address +1)
Assign sequential numbers to
the outdoor units starting with the
number that equals the address
of the indoor unit in the same re-
frigerant circuit plus 50.
-
Settings to be made with the sub/
main switch
Factory
Notes
setting
00
00
Main
BS_02_C