En-15
6.7. External input and external output
6.7.1 Terminal position
CN135
CN131 CN136
CN137
CN134
CN115
CN133
Input 5
(Orange)
Outdoor unit PC board
(Yellow) (Black)
(Blue)
(Red)
(Black)
(White)
Input 4 Input 3 Input 1 Output 1 Output 2
CAUTION
Do not bundle the cable
for base heater with other
cables.
(Example)
In case of Outdoor unit
(1) Insert the connector
to CN134 (Red) and
CN135 (Orange) of
control PC board.
(2) Fix it to the wire with
the attached cable tie.
CN134
CN115
CN135
Clamp
(Red)
(Black)
Cable tie
(accessory)
Wire
* Do not clamp the
base heater cable.
Clamp
(Orange)
6.7.2 External input terminal
• Setting to low noise mode, outdoor unit operation peak control setting, emergency/batch
stop and electricity meter pulse are possible from the outside.
• Except for wattmeter pulse reception (CN135) among external input terminals, only the
primary unit is effective.
Wiring method and specifications
* A twisted pair cable (0.33 mm² (22AWG)) should be used. Maximum length of cable is
150 m.
* Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed
* For each input, pin No. 1 is of positive polarity and pin No. 2 is of ground level.
CN131 CN133 CN132 CN134 CN135
Connected
unit
Connected
unit
Connected
unit
Connected
unit
Connected
unit
(Yellow) (White)(Green) (Red) (Orange)
P.C.B
Input 1
Input 3Input 2
Input 4
Input 5
Operation behavior
Each input terminal works as follows.
Connector
Input
signal
Status
Outdoor unit
Primary
Subor-
dinate
Input 1
CN131 (Yellow)
OFF Normal operation
O
ON Low noise mode operation
Input 2
CN132 (Green) (*1)
OFF Cooling priority
O
ON Heating priority
Input 3
CN133 (White)
OFF Normal operation
O
ON
Outdoor unit operation peak
control
Input 4
CN134 (Red)
OFF Normal operation
O
ON
Batch stop or Emergency stop
operation *2, *3
Input 5
CN135 (Orange) (*4)
No pulse
No information from electricity
meter
OO
Pulse
Power usage information from
electricity meter
Subordinate unit can connect only input 5 (CN135).
The operations of each input terminal and the selection of function are set with the push
button on the PC board of outdoor unit. About the setting, please refer to “7. 4. Push but-
ton setting”.
NOTES:
*1: The “external input priority mode” must be set by pressing push button on PC board
of outdoor unit. (Refer to “7. FIELD SETTING”.)
*2: Batch stop or Emergency stop pattern can be selected by outdoor unit PC board
push button. (Refer to “7. FIELD SETTING”.)
*3: The emergency stop function mounted in this model does not guarantee the regula-
tions of each country. For this reason, sufficient checking is necessary regarding
use.
Especially, since the fact that the equipment may not be emergency-stopped in the
case of breaking of the wiring to the external input terminals and communication
line, communication error due to noise, VRF external input circuit trouble, etc. must
be considered, the provision of double measures that add direct interruption of the
power supply by switch, etc. is recommended as a precaution.
6.7.3 External output terminal (primary unit only)
• You can detect the operation condition of outdoor unit and the abnormal situation of both
indoor and outdoor unit.
• The external output terminal is only valid for primary unit.
Wiring method and specifications
Error status
This output indicates the outdoor unit
and connected indoor unit's “Normal” or
“Error” status.
Operation status
This output indicates the outdoor unit's
“Operation” status.
Connector
Output
voltage
Status
Output 1
CN136
(Black)
0 V Normal
DC 12-24 V
(*1)
Error
Output 2
CN137
(Blue)
0 V Stop
DC 12-24 V
(*1)
Operation
P.C.B.
CN136 (Black) or
CN137 (Blue)
DC power supply
(External) 12-24 V
Connected load (Operation Indica-
tor or Error Indicator)
Connected unit
*1: Provide a DC 12 to 24 V power supply.
Select a power supply capacity with an ample surplus for the connected load.
*2: The allowable current is 30 mA or less.
Provide a load resistance such that the current becomes 30 mA or less.
*3: Polarity is [+] for pin 1 and [-] for pin 2. Connect correctly.
Do not impress a voltage exceeding 24 V across pins 1-2.
* A twisted pair cable (0.33 mm² (22AWG)) should be used.
Maximum length of cable is 150 m.
* Use an external input and output cable with appropriate external dimension, depending
on the number of cables to be installed.
6.7.4 Base heater terminal
This is the output signal for base heater. Output signal ON, when the outdoor temperature
goes down below 2°C, and signal OFF at the outdoor temperature 4°C.
Voltage:
power supply input voltage
Cable
(0.82 mm² (18AWG))
P.C.B.
Base heater (*2)
CN115
(Black)
(*1)
*1: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.
*2: The allowable current is 1 A or less.
9378945708-02_IM_L9.indb 159378945708-02_IM_L9.indb 15 2022/1/20 15:34:382022/1/20 15:34:38
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