Mitsubishi Electric PUHY-P200 Service Handbook page 44

[ II Restrictions ]
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 1.
Only use shielded cables.
Shielded cable connection
Same as [5] 1.
2) Transmission line for centralized control
Daisy-chain terminals A and B on the system controller,
terminals M1 and M2 on the terminal block for transmis-
sion line for centralized control (TB7) on the outdoor
units (OC) in different refrigerant circuits and on the out-
door units (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.
If a system controller is connected, set the central control
switch (SW2-1) on the control board of all outdoor units
to "ON."
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).
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
(5) Address setting method
Proce-
Unit or controller
dures
1 Indoor Main unit
unit
Sub unit
2 LOSSNAY
3 MA Main
remote remote
controller controller
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
Address
setting
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 address
+1, main unit address +2,
main unit address +3, etc.)
LC 01 to 50 Assign an arbitrary but
unique address to each of
these units after assigning
an address to all indoor units.
MA No
settings
required.
MA Sub Settings to be made accord-
remote ing to the remote controller
controller function selection
OC 51 to 100
Assign sequential address to
the outdoor units in the same
OS1
refrigerant circuit.
OS2
The outdoor units are automat-
ically designated as OC, OS1,
and OS2.(Note)
- 35 - 35
a power failure, 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 con-
trol is not possible, 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 unit (IC) to the appropriate terminals
on the terminal block for indoor-outdoor transmission line
(TB5) on LOSSNAY (LC). (Non-polarized 2-core cable)
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 or the LM adapter alone
is connected.
5) Switch setting
Address setting is required as follows.
Setting method
To perform a group oper-
ation of indoor units that
have different functions,
designate the indoor unit
in the group with the
greatest number of func-
tions as the main unit.
None of these addresses
may overlap any of the in-
door 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 switch-
es to 50.
)
Factory
Notes
setting
00
00
Main
00
GB