Mitsubishi Electric PUHY-P200 Service Handbook page 46

[ II Restrictions ]
(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 1), 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 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)
When both of the following conditions are met, move the
power jumper connector on the control board from CN41
to CN40 on only one of the outdoor units: (1) No power
supply units are connected to the transmission line for
centralized control AND (2) No controllers with a power-
supply function are connected to the system.
Set the central control switch (SW2-1) on the control
board of all outdoor units to "ON."
(5) Address setting method
Proce-
Unit or controller
dures
1 Indoor Main unit
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).
HWE10040
) on the outdoor
Address set-
ting range
IC 01 to 50 Assign the smallest address to the
main unit in the group.
Assign sequential numbers starting
with the address of the main unit in
the same group +1. (Main unit ad-
dress +1, main unit address +2, main
unit address +3, etc.)
LC 01 to 50 Assign an arbitrary but unique ad-
dress to each of these units after as-
signing an address to all indoor units.
MA No
settings
required.
MA Sub Settings to be made according to the
remote remote controller function selection
controller
OC 51 to 100 Assign sequential address to the out-
OS1 door units in the same refrigerant cir-
OS2 cuit.
The outdoor units are automatically
designated as OC, OS1, and OS2.
(Note)
- 37 - 37
b) When not daisy-chaining TB7's on the outdoor units in the
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).
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 [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.
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 op-
eration of indoor units
that have different func-
tions, designate the in-
door unit in the group
with the greatest num-
ber of functions as the
main unit.
None of these address-
es may overlap any of
the indoor unit address-
es.
- Enter the same indoor
unit group settings on
the system controller as
the ones that were en-
tered on the MA remote
controller.
To set the address to
100, set the rotary
switches to 50.
)
Factory
Notes
setting
00
00
Main
00
GB