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Mitsubishi Electric PFAV-P250VM-E Service Manual page 38

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[ II Restrictions ]
(4) Wiring method
1) Indoor-outdoor transmission cable
Daisy-chain terminals M1 and M2 of the terminal block
for indoor-outdoor transmission cable (TB3) on the out-
door units (OC and OS) (Note1) and of the terminal block
for indoor-outdoor transmission cable (TB5) on the in-
door unit (IC). (Non-polarized two-wire)
Only use shielded cables.
Shielded cable connection
Connect the ground terminal
of TB5 on IC with the shielded cable.
The outdoor units in the same refrigerant circuit are au-
tomatically designated as OC and OS.
2) Transmission cable for the centralized control system
No connection is required.
(5) Address setting method
Unit or controller
1
Indoor unit
2
MA remote
controller
3
Outdoor unit
∗Applicable to the P750 and P900-F models.
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
Units are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).
HWE10190
of OC to the S terminal
Address
setting
range
Main con-
IC
01 to 50
troller
Sub con-
troller*
Main re-
MA
No settings
mote con-
required
troller
Sub remote
MA
Sub re-
controller
mote con-
troller
OC
51 to 100
OS
3) MA remote controller wiring
Required when operation with two remote controllers or
group operation is performed.
When two remote controllers are connected to the
system
When two remote controllers are connected to the sys-
tem, connect terminals 1 and 2 on the terminal block for
MA remote controller cable (TB15) on the indoor unit (IC)
to the terminal block on the MA remote controller (sold
separately). (Non-polarized two-wire)
Set the Main/Sub setting of the MA remote controller
(sold separately) connected to the indoor unit to Sub.
The main MA remote controller is built in on the indoor
unit.
4) Switch setting
Address setting is required as follows.
Setting method
To be set to an arbitrary
address within the range
on the left.
Assign an address that
equals the address of the
main unit +1.
-
Settings to be made in the
remote controller function
selection mode
Assign an address that
equals the address of the
indoor unit in the same re-
frigerant circuit plus 50.
Assign sequential ad-
dresses to the outdoor
units in the same refriger-
ant circuit.
The outdoor units are au-
tomatically designated as
OC and OS. (Note)
- 29 -
29
Factory
Notes
setting
To set the address to
"100," set the switch to
"50."
00
Main
00
GB
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