Mitsubishi Electric PUHY-P200 Service Handbook page 50

[2-7 Example System with an MA Remote Controller ]
(4) Wiring method
1) Indoor/outdoor transmission line
Daisy-chain terminals M1 and M2 on the terminal block
for indoor-outdoor transmission line (TB3) on the outdoor
units (OC, OS1, OS2) (Note a), terminals M1 and M2 on
the terminal block for indoor-outdoor transmission line
(TB5) on each indoor unit (IC), and the S terminal on the
system controller. (Non-polarized two-wire)
Only use shielded cables.
a) The outdoor units in the same refrigerant circuit are auto-
matically designated as OC, OS1, and OS2. The outdoor
units are designated as OC, OS1, and OS2 in the order
of capacity from large to small (if two or more units have
the same capacity, in the order of address from small to
large).
Shielded cable connection
Daisy-chain the ground terminal (
units (OC, OS1, OS2), the S terminal on the terminal
block (TB5) on the indoor unit (IC), and the S terminal on
the system controller with the shield wire of the shielded
cable.
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block
for transmission line for centralized control (TB7) on the
outdoor units (OC) in different refrigerant circuits and on
the OC, OS1, and OS2 in the same refrigerant circuit.
(Note b)
If a power supply unit is not connected to the transmis-
sion line for centralized control, replace the power jump-
er connector on the control board from CN41 to CN40 on
only one of the outdoor units.
Set the central control switch (SW5-1) on the control
board of all outdoor units to "ON."
b) When not daisy-chaining TB7's on the outdoor units in the
(5) Address setting method
Proce-
Unit or controller
dures
1 Indoor Main unit IC
unit
Sub unit
2 LOSSNAY
3 MA Main
remote remote
control- controller
ler
Sub
remote
controller
4 Outdoor unit
The outdoor units in the same refrigerant circuit are automatically designated as OC, OS1, and OS2.
The outdoor units are designated as OC, OS1, and OS2 in the order of capacity from large to small (if two or more units have
the same capacity, in the order of address from small to large).
HWE14040
) on the outdoor
Address set-
ting range
01 to 50
Assign the smallest address to
the main unit in the group.
Assign sequential numbers start-
ing with the address of the main
unit in the same group +1. (Main
unit address +1, main unit ad-
dress +2, main unit address +3,
etc.)
LC 01 to 50 Assign an arbitrary but unique
address to each of these units af-
ter assigning an address to all in-
door units.
MA No
settings re-
quired.
MA Sub Settings to be made accord-
remote con- ing to the remote controller
troller function selection
OC 51 to 100 Assign sequential address to
OS1 the outdoor units in the same
OS2 refrigerant circuit.
The outdoor units are auto-
matically designated as OC,
OS1, and OS2. (Note)
- 41 - 41
same refrigerant circuit, connect the transmission line for
centralized control to TB7 on the OC (Note a). To maintain
centralized control even during an OC failure or a power fail-
ure, daisy-chain TB7 of OC, OS1, and OS2. (If there is a
problem with the outdoor unit whose power jumper was
moved from CN41 to CN40, centralized control is not possi-
ble, even if TB7's are daisy-chained).
c) When connecting TB7, only commence after checking that
the voltage is below 20 VDC.
Only use shielded cables.
Shielded cable connection
Daisy-chain the S terminal on the terminal block (TB7) on
the outdoor units (OC, OS1, OS2) with the shield wire of
the shielded cable. Short-circuit the earth terminal (
and the S terminal on the terminal block (TB7) on the out-
door unit whose power jumper connector is mated with
CN40.
3) MA remote controller wiring
Same as 2-7-1
When 2 remote controllers are connected to the sys-
tem
Same as 2-7-1
Group operation of indoor units
Same as 2-7-1
4) LOSSNAY connection
Connect terminals M1 and M2 on the terminal block
(TB5) on the indoor units (IC) to the appropriate termi-
nals on the terminal block for indoor-outdoor transmis-
sion line (TB5) on LOSSNAY (LC). (Non-polarized two-
wire)
Indoor units must be interlocked with the LOSSNAY unit
using the system controller. (Refer to the operation man-
ual for the system controller for the setting method.) In-
terlock setting from the remote controller is required if the
ON/OFF remote controller alone is connected.
5) Switch setting
Address setting is required as follows.
Setting method
To perform a group operation of
indoor units that have different
functions, designate the indoor
unit in the group with the great-
est number of functions as the
main unit.
None of these addresses may
overlap any of the indoor unit
addresses.
- Enter the same indoor unit
group settings on the system
controller as the ones that were
entered on the MA remote con-
troller.
To set the address to 100,
set the rotary switches to 50.
)
Factory
Notes
setting
00
00
Main
00
GB