Multi Variable Air Conditioners Floor and Ceiling Type Indoor Unit
16
twisted wire.
2) Loosen the wiring screws on patch board.
3) Use a round terminal fastener or a plier to securely fasten the round terminal with each core
wire of the multi-core wire.
4)
Confirm the position of each core wire on the round terminal and then use a screwdriver to
tighten the terminal screw.
5.2 Power Cord Connection
Note:
①
All indoor units must be unified of power supply so that they can be powered ON/OFF at the
same time.
②
If the supply cord is damaged, it must be replaced by the manufacturer, its service agent or
similarly qualified persons in order to avoid a hazard.
power supply
Outdoor unit
Indoor
unit 1
Indoor
unit 2
Indoor
unit n
connection
wire (match
with resistance)
Wired Controller
Wired Controller
Wired Controller
Note: indoor unit quantity n is according to the outdoor unit capacity.
Wiring board of power XT1
Wiring board of
communication XT2
Wiring board of power XT1
Wiring board of
communication XT2
Wiring board of power XT1
Wiring board of
communication XT2
QF
L
N
QF
PE
QF
PE
QF
PE
Fig 5.2
●
For units with single-phase power supply.
(1) Detach the electric box cover.
(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.
5.3 Connection of Communication Wire between Indoor Unit and Outdoor
Unit(or indoor unit)
(1) Detach the electric box cover.
(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
