Mitsubishi Electric PQHY-P120THMU-A, Service Handbook

Page: 59 / 414

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[
II
Restrictions ]
GB HWE09080
(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
Same as [5] 4.
Shielded cable connection
Same as [5] 4.
3) ME remote controller wiring
ME remote controller is connectable anywhere on the in-
door-heat source transmission line.
When 2 remote controllers are connected to the sys-
tem
Refer to the section on Switch Setting.
Performing a group operation (including the group
operation of units in different refrigerant circuits).
Refer to the section on Switch Setting.
4) LOSSNAY connection
Same as [5] 4.
5) Switch setting
Address setting is required as follows.
(5) Address setting method
The heat source units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
Proce-
dures
Unit or controller
Address setting
range
Setting method Notes
Factory
setting
1 Indoor
unit Main unit IC 01 to 50 Assign the smallest ad-
dress to the main unit in
the group. To perform a group
operation of indoor
units that have differ-
ent functions, desig-
nate the indoor unit in
the group with the
greatest number of
functions as the main
unit. 00
Sub unit Assign sequential num-
bers starting with the ad-
dress of the main unit in
the same group +1.
(Main unit a1,
main unit a2,
main unit a3,
etc.)
2 LOSSNAY LC 01 to 50 Assign an arbitrary but
unique address to each
of these units after as-
signing an address to all
indoor units. None of these ad-
dresses may overlap
any of the indoor unit
addresses. 00
3 ME re-
mote
controller Main
remote
controller RC 101 to 150 Add 100 to the main unit
address in the group
Œ
It is not necessary to
set the 100s digit.
Œ
To set the address
to 200, set the rota-
ry switches to 00.
101
Sub
remote
controller RC 151 to 200 Add 150 to the main unit
address in the group
4 Heat source unit OC
OS1
OS2 51 to 100 Assign sequential ad-
dress to the heat source
units in the same refrig-
erant circuit. The heat
source units are auto-
matically designated as
OC, OS1, and OS2.
(Note) To set the address to
100, set the rotary
switches to 50. 00