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Mitsubishi Electric PFAV-P250VM-E Service Manual page 42

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[ II Restrictions ]
(4) Wiring method
1) Indoor-outdoor transmission cable
Same as section [5] 2.
Shielded cable connection
Same as section [5] 1.
2) Transmission cable for the centralized control system
Daisy-chain terminals M1 and M2 of the terminal block
for centralized control system connection (TB7) on OCs
and terminals A and B of the system controller on OCs.
(non-polarized two-wire)
Move the power jumper on the control board from CN41
to CN40 on only one of the outdoor units. Set the central-
ized control switch (DIP SW2-1) of the control board on
all outdoor units to ON.
Only use shielded cables.
(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 set-
ting range
Main con-
IC
01 to 50
troller
Sub con-
troller
Main re-
MA
No settings
mote con-
required
troller
Sub re-
MA
Sub remote
mote con-
controller
troller
OC
51 to 100
OS
Shielded cable connection
Daisy-chain the S terminals of the terminal block (TB7)
and of the system controller on the outdoor units with the
shielded cable. Connect the S (shield) terminal of the ter-
minal block (TB7) on the outdoor unit whose power jump-
er was moved from CN41 to CN40 to the ground terminal
( ) of the control box.
3) MA remote controller wiring
Same as section [5] 1.
When two remote controllers are connected to the
system
Same as section [5] 1.
Group operation of indoor units
Same as section [5] 1.
4) Switch setting
Address setting is required as follows.
Setting method
Assign the lowest
To perform a group opera-
address to the main
tion of indoor units that fea-
indoor unit in the
ture different functions,
group.
designate the indoor unit
with the most functions in
Assign sequential
the group as the main unit.
numbers starting
with the address of
the main unit in the
same group.
[main unit +1, +2,
+3...]
-
Make the same indoor unit
group settings with the sys-
tem controller as the ones
that were made with the MA
Settings to be made
remote controller.
in the remote con-
troller function se-
lection mode
Assign an address
To set the address to "100,"
that equals the ad-
set the switch to "50."
dress of the indoor
unit in the same re-
frigerant circuit plus
50.
Assign sequential
addresses to the
outdoor units in the
same refrigerant cir-
cuit.
The outdoor units
are automatically
designated as OC
and OS. (Note)
- 33 -
33
Factory
Notes
setting
00
Main
00
GB
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