Power Cord Connection; Connection Of Communication Wire Between Indoor Unit And Outdoor Unit(Or Indoor Unit); Connect Communication Wire Of Wired Controller - Gree GMV-ND280PH/A-T Owner's Manual

5.2 Power Cord Connection

Notes:
All indoor units must be unified of power supply so that they can be powered ON/OFF at the
same time.
QF
power supply
Outdoor unit
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.
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 fig5.3.1.
wiring screw
(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 Connect Communication Wire of Wired Controller

(1) Open electric box cover of indoor unit.
(2) Let the communication wire go through the rubber ring.
(3) Connect the communication wire to terminal H1 and H2 of indoor 4-bit wiring board.
(4) Fix the communication wire with wire clip on the electric box.
Multi Variable Air Conditioners Duct Type Indoor Unit
QF
QF
PE
Wiring board of power XT1 Wiring board of power XT1
Wiring board of
communication XT2 communication XT2
Indoor Indoor
unit 1 unit 2
Wired Controller Wired Controller
Note: indoor unit quantity n is according to the outdoor unit capacity .
Fig 5.2
terminal board
Fig 5.3.1
15
PE
Wiring board of
".
indoor unit
QF
PE
Wiring board of power XT1
Wiring board of
communication XT2
Indoor
connection
unit n
wire (match
with resistance)
Wired Controller
IDU PCB
communication
interface CN12
D1 D2 H1 H2
1
H1 H2
D1 D2
match resistance
previous IDU
for communication
Fig 5.3.2