Mitsubishi Electric PFD-P250VM-E, Service Handbook

Page: 45 / 326

[2-7 Example System with an MA Remote Controller ]
BS_02_C
18
- chapter 2
2
Rest
rict
io
ns
(4) Wiring method
1) Indoor/outdoor transmission line
Same as 2-7-1
2) MA remote controller wiring
Group operation of indoor units
To perform a group operation of indoor units (IC), daisy-
chain terminals 1 and 2 on the terminal block (TB15) on
all indoor units (IC). (Non-polarized 2-core cable)
 Set the Main/Sub switch on one of the MA remote con-
trollers to SUB.
3) Switch setting
Address setting is required as follows.
(5) Address setting method
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).
Procedures Unit or controller
Address
setting range
Setting method Notes
Factory
setting
1 Indoor
unit
Main unit IC 01 to 50 Assign a sequential odd number
starting with "01" to the upper in-
door controller.
00
Sub unit IC 01 to 50 Assign sequential numbers start-
ing with the address of the main
unit in the same group. (Main
unit a1)
2 Outdoor unit OC
OS
51 to 100 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.
00
3 MA
remote
controller
Main
remote
controller
MA No settings
required.
- Main
Sub
remote
controller
MA Sub
remote
controller
Settings to be made with the sub
/ main switch
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