Multi Variable Air Conditioners Cassette Type Indoor Unit
15
Fig 5.2
(1) For units with single-phase power supply.
1) Detach the electric box lid.
2) Let the power cord pass through the wiring through-holes.
3) Connect the power cord to terminal "L, N, ".
4) Fix the power card with wiring clamp.
(2) For units with three-phase power supply.
1) Let the power cord pass through the wiring through-holes.
2) Connect the power cord to terminal "L1, L2, L3, N, ".
3) Fix the power cable with wiring clamp.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit(or indoor unit)
(1) Detach the electric box lid.
(2) Let the Communication cable pass through the wiring through-holes.
(3) Connect the communication wire to terminal D1 and D2 of indoor 4-bit wiring board, as shown
in fig 5.3.1.
wiring screw
terminal board
1
D1
D1
D2
H1
H2
D2
H1
H2
IDU PCB
indoor unit
previous IDU
match resistance
for communication
communication
interface CN12
Fig 5.3.1 Fig 5.3.2
(4) Fix the communication cable with clamp of electric box.
(5) For more reliable communication, make sure connect the terminal resistor to the most
downstream IDU of the communication bus (terminal D1 and D2), as shown in fig 5.3.2,
terminal resistor is provided with each ODU.
5.4 Connection of Communication Wire for Wired Controller
(1) Detach the electric box lid.
(2) Let the communication wire pass through the wiring through-holes.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
(4) Fix the communication wire with clamp.
