Mitsubishi Electric PQHY-P72TYHMU-A Service Handbook page 39

[ II Restrictions ]
(4) Wiring method
1) Indoor-heat source transmission line
Same as [5] 1.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
No connection is required.
3) MA remote controller wiring
Same as [5] 1.
When 2 remote controllers are connected to the sys-
tem
Same as [5] 1.
Group operation of indoor units
Same as [5] 1.
(5) Address setting method
Proce-
Unit or controller
dures
1 Indoor unit
2 LOSSNAY
3 MA
remote con-
troller
4 Heat source unit
The heat source units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
HWE09080
Address
setting
range
Main IC 01 to 50
unit
Sub unit
LC 01 to 50
Main MA No
remote settings re-
control- quired.
ler
Sub MA Sub
remote remote
control- controller
ler
OC 51 to 100
OS1
OS2
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor unit (IC) to the appropriate terminals
on the terminal block (TB5) on LOSSNAY (LC). (Non-po-
larized two-wire)
ŒInterlock setting between the indoor units and LOSS-
NAY units must be entered on the remote controller. (Re-
fer to "IV [3] Interlock Settings via the MA Remote
Controller" or the installation manual for the MA remote
controller for the setting method.)
5) Switch setting
Address setting is required as follows.
Setting method
Assign the smallest ad- To perform a group opera-
dress to the main unit in the tion of indoor units that
group. have different functions,
designate the indoor unit
Assign sequential numbers
in the group with the great-
starting with the address of
est number of functions as
the main unit in the same
the main unit.
group +1. (Main unit ad-
dress +1, main unit ad-
dress +2, main unit
address +3, etc.)
Assign an arbitrary but None of these addresses
unique address to each of may overlap any of the in-
these units after assigning door unit addresses.
an address to all indoor
units.
-
Settings to be made ac-
cording to the remote con-
troller function selection
Assign sequential address To set the address to 100,
to the heat source units in set the rotary switches to
the same refrigerant circuit. 50.
The heat source units are
automatically designated
as OC, OS1, and
OS2.(Note)
- 30 -
Factory
Notes
setting
00
00
Main
00
GB