[ II Restrictions ]
27- 27 -
HWE1018A GB
(4) Wiring method
1) Indoor/outdoor transmission line
Connect M1, M2 terminals of the indoor/outdoor trans-
mission line terminal block (TB3) on the outdoor unit (OC
) and A1, B1 terminals of the indoor/outdoor terminal
block (TB5-1) on the indoor unit (IC). (Non-polarized 2-
core cable)
Only use shielded cables.
Shielded cable connection
Connect the earth terminal of the OC and S terminal of
the IC terminal block (TB5-1).
2) Transmission line for centralized control
Daisy-chain terminals M1 and M2 on the terminal block
for transmission line for centralized control (TB7) on
each outdoor unit (OC). Disconnect the male connector
on the controller board from the female power supply
switch connector (CN41), and connect it to the female
power supply switch connector (CN40) on only one of the
outdoor units.
Only use shielded cables.
Shielded cable connection
To ground the shielded cable, daisy-chain the S-termi-
nals on the terminal block (TB7) on each of the outdoor
units. Connect the S (shielded) terminal on the terminal
block (TB7) on the outdoor unit whose male connector
on CN41 was disconnected and connected to CN40 to
the earth terminal( ) on the electric box.
3) Switch setting
Address setting is required as follows.
(5) Address setting method
Procedures Unit or controller
Address
setting range
Setting method Notes
Factory
setting
1 Indoor
unit
Main unit IC 01 to 50 Assign a sequential odd number
starting with "01" to the upper in-
door controller.
00
Sub unit IC 01 to 50 Assign sequential numbers start-
ing with the address of the main
unit in the same group. (Main
unit address +1)
2 Outdoor unit OC 51 to 100 Add 50 to the address assigned
to the indoor unit connected to
the system with one outdoor unit.
00
3MA
remote
controller
Main
remote
controller
MA No settings
required.
-Main
Sub
remote
controller
MA Sub
remote
controller
Settings to be made with the sub/
main switch
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