Mitsubishi Electric PURY-P72 Service Handbook page 43

[II Restrictions J
(4) Wiring method
1) Indoor/outdoor transmission line
Same as [5] 2.
Only use shielded cables.
Shielded cable connection
Same as [5] 2.
2)
Transmission line for centralized control
Daisy-chain terminals A and B on the system controller, ter-
minals M1 and M2 on the terminal block for transmission line
for centralized control
(TB7)
on the outdoor units (OC) in dif-
ferent refrigerant circuits and on the outdoor units (OC and
OS) in the same refrigerant circuit.
If a power supply unit is not connected to the transmission
line for centralized control, replace the power jumper con-
nector on the control board from CN41 to CN40 on only one
of the outdoor units.
If a system controller is connected, set the central control
switch (SW2-1) on the control board of all outdoor units to
"ON."
Notel
The outdoor units in the same refrigerant circuit are au-
tomatically designated as OC, OS1, and OS2 in the or-
der of capacity from large to small (if two or more units
have the same capacity, in the order of address from
small to large).
-Only use shielded cables.
Shielded cable connection
(5) Address setting method
Daisy-chain the S terminal of the terminal block (TB7) on
the system controller, OC, and OS with the shield of the
shielded cable. Short-circuit the earth terminal ( ,h ) and
the S terminal on the terminal block (TB7) on the outdoor
unit whose power jumper connector is mated with CN40.
3)
MA remote controller wiring
Same as [5J 1.
When 2 remote controllers are connected to the sys-
tem
Same as [5J 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 blockforindoor-outdoortransmission line
(TB5) on LOSSNAY (LC). (Non-polarized two-wire)
'Indoor units must be interlocked with the LOSSNAYunit
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.
Ad- Fac-
Proce-
Unit or controller
dress
Setting method Notes
tory
dures setting set-
range
ting
1 Indoor
Main unit
IC
01 to
•Assign the smallest address to the main unit
'Port number setting is
00
unit
50
in the group.
required
tin a system
with
a sub BC controller, make
•To perform a group op-
the sellings lor the indoor units in the fol-
lowing order.
eration of indoor units
(i) Indoor unit to be connected to the main BC
that feature different
controller
functions, designate
(ii) Indoor unit to be connected
to
sub BC
the indoor unit in the
controller
1
(iii) Indoor unit to be connected to sub BC
group with the greatest
controller 2
number of functions as
Make the settings for the indoor units in the
the main unit.
way that the formula "(i)
< (ii) <
(iii)" is true.
Sub unit
Assign sequential numbers starling 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.)
2 LOSSNAY LC
01 to
Assign an arbitrary but unique address to None of these addresses may
00
50
each of these units after assigning an address
overlap any of the indoor unit
to all indoor units. addresses.
3 MA
Main
MA
No set·
-
Make the same indoor unit
Main
remote
remote con- linlls
re-
group settings with the system
controller
troller qUired. controller as the ones that
were made with the MA remote
Sub
MA
SUb
Settings to be made with the Sub/
controller.
remote con- remote
Main switch
troller
controller
4 Outdoor unit (Note) OC
51 to 100
tAssign sequential address to the outdoor tTo set the address to
100,
00
OS
units in the same refrigerant circuit.
set the rotary switches to
50.
•The outdoor units are automatically desig-
tlf the addresses that is as-
nated as OC and OS.(Note)
signed
to
the main Be con-
troller overlaps any of the
5
Auxiliary
BCcon-
BS 51
to
100
Assign an address that equals the sum of the addresses that are assigned
outdoor
troller (Sub)
smallest address of the indoor units that are to the outdoor units or to the
connected to the sub BC controller and
50.
sub BC controller, use a dif·
unit
ferent, unused address with-
BC control-
BC OC (or OS if it exists) +1
in the setting range.
ler(Main)
tThe use of a sub BC control-
ler requires the connection
of a main BC controller.
Note
I
The outdoor units in the same refrigerant circuit are automatically designated as OC and OS.
They are designated as OC and OS in the descending order of capacity (ascending order of address if the capacities are the
same).
HWE0803A
- 33-
GB