6
7.5
B
External power supply
C
Start/Stop
E
Common
F
Start/Stop
H
Display power supply
A
With-voltage input
K
External I/O board
D
No-voltage input
G
Relay contact output
I
Operation status
J
Fault
L
Terminal block connection
M
Connector connection
N
Wiring distance 100 m or less.
L1
L2
SW12
SW11
CN53
1
2
3
4
5
1
2
3
4
5
TB21
TB22
TB23
XA
XB
XB
XA
COM
1
2
BC
B1
B2
AC
A1
A2
3
4
5
CN54
[Fig. 7.5.1]
[Fig. 7.5.2]
Display
power supply
L1, L3
L2, L4
XA ~ XE
DC30 V 1 A or less
AC220 - 240 V 1 A
Operation status
Fault status
Relay (allowable current 10 mA - 1 A)
G
Relay contact output
<A> Model 250
<B> Model 500
B
External power supply
C
Start/Stop
A
With-voltage input
E
Common
F
Start/Stop
H
Display power supply
D
No-voltage input
G
Relay contact output
I
Operation status (No.1)
J
Fault (No.1)
I
Operation status (No.2)
J
Fault (No.2)
L
Terminal block connection
M
Connector connection
N
Wiring distance 100 m or less.
SW12
K
External I/O board
L1
L2
L3
L4
(*1)
Short circuit plate
(*1)
Short circuit plate
SW11
CN53
1
2
3
4
5
1
2
3
4
5
TB21
TB22
TB23
XA
XB
XC
XE
XD
XE
XD
XC
XB
XA
COM
1
2
BC
B1
B2
AC
A1
A2
3
4
5
CN54
7
•
Notes on using external functions (Model 500 only)
(*1)
For instructions on how to install the short circuit plate, refer to “Notes on using
external input function” shown below.
When using the external input function on the indoor unit that is connected to a two-
refrigerant circuit, connect the short-circuit plate that is supplied with the unit to the
appropriate terminals on the external input-output board.
Without the short-circuit plate, the unit will not function properly.
Don’t connect the short-circuit plate in case of a one-refrigerant circuit.
Caution
External input-output board
<The case of with-voltage input>
· Connecting the short-circuit plate
<The case of no-voltage input>
External input-output board
Short-circuit plate
External input
5
4
3
2
1
COM
B2
B1
BC
A2
A1
AC
TB23
TB21
TB22
CN53
CN54
Short-circuit plate
External input
5
4
3
2
1
COM
TB23
TB21
TB22
CN53
CN54
B2
A2
A1
AC
B1
BC
A
Site wiring
B
Fix low-voltage system
(DC30 V or less) wiring
with clamps and pass to
unit via transmission line
wiring holes.*1
C
Fix high-voltage system
(AC220 - 240 V) wiring
with clamps and pass to
unit via power supply
wiring holes.*2
D
To CN51 on control board
(inner wiring)
E
model 500 only
E
model 500 only
For instructions on how to install
the short circuit plate, refer to
"Notes on using external input
function" shown on the left.
5
4
3
2
1
COM
B2
B1
BC
A2
A1
AC
TB23
TB21
TB22
CN53
CN54
SW11
Remote Start/Stop switch
* Toggles ON/OFF each time switch is pressed (pulse input).
Contact: Minimum applicable load DC 12 V 1 mA
Contact rating DC 12 V 0.1 A and over
D
No-voltage input
A
With-voltage input
External
power supply
SW12
Pulse input of start or stop
DC12 - 24 V
Input current (per contact)
Approximately 10 mA (DC12 V)
Remote Start/Stop switch
* Toggles ON/OFF each time switch is pressed (pulse input).
