Basic wiring diagram
CAUTION
Outdoor
unit-1
1 2
Ground
Ground
ON/OFF
controller
U1
U2
C3
C4
Ground for control wiring
ON/OFF
controller
U1
U2
C3
C4
Ground for control wiring
Ground
2
1
Ground
In.-1
1 2
1 2
Remote
controller
8
Ensure that wiring connections are correct. (Incorrect wiring will
damage the equipment.)
Outdoor
Outdoor
unit-2
unit-3
1 2
Ground
Power supply
(220-240 V
50/60 Hz)
N
L
Power supply
(220-240 V
50/60 Hz)
N
L
1
2
Ground
In.-2
1 2
1 2
Remote
controller
1. The following fi gure is the inter-unit control wiring.
NOTE
Use the shielded wiring.
2. In. means indoor unit.
3. One ON/OFF controller can connect up to two units—one main unit and
one sub unit—for each zone.
Outdoor
unit-m
1 2
1 2
Ground
1
2
1
Ground
In.-3
In.-4
1 2
1 2
1 2
Remote
controller
m ≤ 30
2
1
2
Ground
In.-n
1 2
1 2
Remote
controller
Fig. 4
n ≤ 64