Mitsubishi Electric PU(H)Y-P250YGM-A, Service Handbook

Page: 32 / 215

- 23 -
[
II
Restrictions ]
Wiring method/address setting method
1) Indoor/outdoor transmission line
Connect M1, M2 terminals of the indoor/outdoor transmission line terminal block (TB3) on the outdoor unit (OC)
and A1, B1 terminals of the indoor/outdoor terminal block (TB5-1) on the indoor unit (IC). (Non-polarized 2-core
cable)
ΠOnly use shielded cables.
[Shielded cable connection]
Connect the earth terminal of the OC and S terminal of the IC terminal block (TB5-1).
2) Switch setting
Address setting is required as follows.
Pro-
ce-
dure
s
Unit or controller
Address-
settin-
grange
Setting method Notes
Facto-
ry set-
ting
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 51 to 100 Add 50 to the address assigned to
the indoor unit connected to the
system with one outdoor unit. 00
3 MA
remote
controller Main
remote
control-
ler MA No settings
required. - Main
Sub
remote
control-
ler MA Sub
remote
controller Settings to be made with the sub/
main switch