130
DC Inverter Multi
VRF Service Manual
7.3.4.2 Communication between indoor unit and outdoor unit is realized by connecting mainboard of indoor unit and patch
board of outdoor unit.
1) When there is only one outdoor module,and also, the qty of indoor units is less than 16, the outdoor unit connect
with indoor unit by communication wire which directly connect patchboard of outdoor unit to mainboard of indoor unit.
Communication wire is 2-pin twisted wire and its both ends are 3-pin XH plugs(2nd and 3rd positions are applied and shall
be corresponding)
ON DIP
SINGLE MODULAR
A
B
A
B
A
B
2
2
A
B
A
B
4
Inverter drive
plate inside
the unit
Capacity code SW1
Qty code
SW2
Address
code SW3
Mian board
of out unit
Communication
inerface
Communication
inerface
Communication
inerface
Communication
inerface
Communication
inerface
CN11
CN12
CN13
CN16
CN17
CN18
CN1 or
COM-OUT3
CN3
CN2
CN1
Address code S2
Pinboard 1
No.1 No.2
No.n(16max)
Indoor to indoor communiction
Communication between
the indoor and the outdoor
Communication interface
port CN1 of pinboards
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