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Mitsubishi Electric PFAV-P250VM-E Service Manual page 40

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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 (TB7) on the out-
door unit (OC) and of the terminal block for indoor-out-
door transmission cable (TB5) on the indoor unit (IC).
(Non-polarized two-wire)
Only use shielded cables.
Shielded cable connection
Same as section [5] 1.
2) Transmission cable for the centralized control system
Same as section [5] 1.
3) MA remote controller wiring
To perform a group operation of the indoor units con-
nected to different outdoor units, set one of the MA re-
mote controllers to Sub.
Same as section [5] 1.
(5) Address setting method
Unit or controller
1
Indoor unit
2
MA remote
controller
3
Outdoor unit
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
Address
setting
range
Main con-
IC
01 to 50
troller
Sub control-
ler
Main re-
MA
No settings
mote con-
required
troller
Sub remote
MA
Sub remote
controller
controller
OC
51 to 100
OS
When two remote controllers are connected to the
system
Same as section [5] 1.
Group operation of indoor units
To perform a group operation of indoor units, connect the
terminals 1 and 2 of the terminal block (TB15) on the in-
door units with each other. (Non-polarized two-wire)
Set the Main/Sub setting of one of the indoor unit remote
controllers to Sub.
Designate the indoor unit in the group with the greatest
number of functions as the main unit.
4) Switch setting
Address setting is required as follows.
Setting method
Assign the lowest ad-
dress to the main indoor
unit in the group.
Assign sequential num-
bers starting with the ad-
dress of the main unit in
the same group.[main
unit +1, +2, +3...]
-
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 automatically
designated as OC and
OS. (Note)
- 31 -
31
Factory
Notes
setting
To perform a group
operation of indoor
units that feature dif-
ferent functions, des-
ignate the indoor unit
in the group with the
greatest number of
functions as the main
unit.
Main
To set the address to
"100," set the switch
to "50."
00
00
GB
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