Connect the operating line for the
outdoor unit to the terminal
“1” and “2” of TB2 on the Switch Box.
Connect the operating line for the
indoor unit (exclusive use of cooling
operation) to the terminal “1” and “2”
of TB2 on the Switch Box.
220-240V~ 50Hz
220V~ 60Hz
Outdoor Unit
Power Supply
Main Switch
Outdoor Unit
Operating Line
(Non-pole, DC5V)
Switch Box
Switch Box
Indoor Unit
Wired
Controller
Indoor Unit
Indoor Unit
In case that the multiple indoor units
are connected to the same Switch
Box, the operation mode (cooling/
heating) for the indoor units will be
the same.
3
2
4
1
2
4
3
1
TB2
TB1
TB2
TB1
N
L
1
2
4
3
1
N
L
1
1
A
2
B
1 A
2
B
1 A
2
B
1
A
2
B
TB2
TB2
TB2
TB2
TB2
1
S
ELB
Earth Leakage
Breaker
2
4
3
3
5
Wired Controller
Wired
Controller
Pull Box
•
Example of Electrical Wiring
The following figure shows an example of electrical wiring around the
Switch Boxes.
NOTES:
1. Do
not
apply
excessive
voltage
to
the
communication
cable
DC5V
(non-polarity)
between
the
outdoor
unit and the
Switch Box
, between the
Switch Box
and the indoor unit or between
Switch Box
es.
2. Use
2-Conductor
shielded
communication
cable
for
the
communication
cable.
(Do
not
use
3-Conductor
cable
or
over.)
3.
Connect the communication cable for the outdoor unit to terminals “1” and “2” on TB2 in the
Switch Box.
4. Connect
the
communication
cable
for
the
indoor
unit
exclusively
for
cooling
operation
to
the
terminal
“1”
and “2” on TB2 in the
Switch Box.
5.
For a
Switch Box
in the same refrigerant cycle, an electrical power supply can be supplied by one main
switch.
6.
Do not connect the power supply line (220-240V) to the terminal block for transmission line.
7.
Connect the ground wiring for the outdoor/indoor units and
Switch Box
. When ground resistance is less
than
100
ohms,
ground
wiring
work
should
be
performed
by
the
qualifie
d
electrician.
8.
Do not run the communication cables along with power supply wiring in the
Switch Box.
Separate
communication
cables
from
the
power
supply
wirings.
6.4
Setting
of
DIP
Switches
DSWs
on
the
PCB1
are
set
before
shipping
as
shown
below
and
no
setting
is
required.
The
“
n
”
mark
indicates
the
position
of
DIP
switches.
Figures
show
setting
before
shipment.
NOTE
ON
1 2 3 4 5 6
ON
1 2
ON
1 2
• DSW1
• DSW4
• DSW5
All indoor and outdoor units must be shut
down prior to attempting to make DIP Switch
adjustments, otherwise, the settings will not
take effect.
● When
introducing
high
voltage
to
terminals
1
and
2
of
TB2,
the
fuse
on
the
PCB
is
open.
In
such
a
case,
first
reconnect
the
wiring
correctly
to
TB2,
and
then
adjust
the
number
1
pin
to
ON
for
DSW4
and
DSW5.
1 2
ON
OFF
18
2
B
1
A
TB2
Wired Controller
Wired
Controller
Cooling Only Indoor Unit
Heating Only Water Module
or Water Module