US FLOOR / FLOOR
Minichiller inverter Duo
27
7.7.3 Wiring between indoor and outdoor units
The indoor unit must be connected to the outdoor unit as shown in the below
figure
.
AB
CN12
NC1
C1
NO1
I-
I+
GND
R-
R+
E-
E+
N
O
N
C
R
+
R
-
R
+
R
-
N
I+
I-
I+
I-
G
N
D
R
G
N
D
R
Auxiliary Board
Terminal block
I+
I+
I-
I-
E+
R+
E-
R-
GND
GNDR
General electric
panel
Protection device
1Ph / 3Ph
Protection device
1Ph / 3Ph
T
I
N
U
R
O
O
D
T
U
O
T
I
N
U
R
O
O
D
N
I
Board AB
Indoor unit
Terminal block
Outdoor unit
y
l
p
p
u
s
r
e
w
o
P
y
l
p
p
u
s
r
e
w
o
P
INDOOR UNIT
FLOOR - FLOOR-S
OUTDOOR UNIT
06-09-12-16
WARNING: Do not confuse on the terminal block of the outdoor unit between the terminals GND (protective earth of
the power supply) with GNDR (ground reference for Modbus connection).
Farther, the shielding of the twisted pair for Modbus signal must be connected at one end to ground terminal
(protective earth terminal) of the unit.
