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6.7. External input and external output
6.7.1 Terminal position
Input 5
Input 4
Input 3
CN135
CN134
CN133
(Orange)
(Red)
(White)
Outdoor unit PC board
CAUTION
Do not bundle the cable
CN135
for base heater with other
(Orange)
cables.
(Example)
CN115
(Black)
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
Clamp
the attached cable tie.
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.
Input 1
Input 2
CN131
CN132
(Yellow)
(Green)
P.C.B
Connected
Connected
unit
unit
En-15
Input 1
Output 1
CN131
CN136
(Yellow)
(Black)
Cable tie
(accessory)
* Do not clamp the
Wire
base heater cable.
Input 3
Input 4
Input 5
CN133
CN134
CN135
(White)
(Red)
(Orange)
Connected
Connected
Connected
unit
unit
unit
Operation behavior
Each input terminal works as follows.
Connector
Output 2
Input 1
CN131 (Yellow)
Input 2
CN132 (Green) (*1)
Input 3
CN133 (White)
Input 4
CN134 (Red)
Input 5
CN135 (Orange) (*4)
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
Clamp
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.
CN134
• The external output terminal is only valid for primary unit.
(Red)
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.
CN136 (Black) or
CN137 (Blue)
*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.
P.C.B.
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.
Input
Status
signal
OFF
Normal operation
ON
Low noise mode operation
OFF
Cooling priority
ON
Heating priority
OFF
Normal operation
Outdoor unit operation peak
ON
control
OFF
Normal operation
Batch stop or Emergency stop
ON
operation *2, *3
No information from electricity
No pulse
meter
Power usage information from
Pulse
electricity meter
Connector
Output 1
CN136
(Black)
Output 2
CN137
(Blue)
DC power supply
P.C.B.
(External) 12-24 V
Connected load (Operation Indica-
tor or Error Indicator)
Connected unit
Voltage:
power supply input voltage
Cable
(0.82 mm² (18AWG))
Outdoor unit
Subor-
Primary
dinate
O
O
O
O
O
O
Output
Status
voltage
0 V
Normal
DC 12-24 V
Error
(*1)
0 V
Stop
DC 12-24 V
Operation
(*1)
Base heater (*2)
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