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6.6.2 External input terminal
Setting to low noise mode, cooling priority/heating priority selection, outdoor unit operation
peak control setting, emergency/batch stop and electricity meter pulse are possible from
the outside.
Wiring method and specifications
* A twisted pair cable (22 AWG (0.33 mm²)) 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.
Input2
Input1
CN132
CN131
(Green)
(Yellow)
P.C.B
connected unit
connected unit
Operation behavior
Each input terminal works as follows.
Connector
Input signal
OFF
Input 1
CN131 (Yellow)
ON
OFF
Input 2
CN132 (Green) *1
ON
OFF
Input 3
CN133 (White)
ON
OFF
Input 4
CN134 (Red)
ON
No pulse
Input 5
CN135 (Orange) *4
Pulse
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 button
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.
*4: Pulse input to CN135 must be width 50 ms or more, and must be interval 50 ms or
more.
6.6.3 External output terminal
You can detect the operation condition of outdoor unit and the abnormal situation of both
indoor and outdoor 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.
P.C.B
CN136 (Black) or
CN137 (Blue)
En-11
Input3
Input4
CN133
CN134
(White)
(Red)
connected unit
connected unit connected unit
Status
Normal operation
Low noise mode operation
Cooling priority
Heating priority
Normal operation
Outdoor unit operation peak control
Normal operation
Batch stop or Emergency stop operation *2, *3
No information from electricity meter
Power usage information from electricity meter
Output
Connector
voltage
Output1
0V
Normal
CN136
DC 12-24 V
Error
*5
(Black)
Output2
0V
Stop
CN137
DC 12-24 V
Operation
(Blue)
*5
DC power supply
(External) 12-24 V
Connected load (Operation Indica-
tor or Error Indicator)
Connected unit
*5: Provide a DC 12 to 24 V power supply.
Select a power supply capacity with an ample surplus for the connected load.
*6: The allowable current is 30 mA or less.
Provide a load resistance such that the current becomes 30 mA or less.
*7: 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.
6.6.4 Base heater terminal
Input5
This is the output signal for base heater. Output signal ON, when the outdoor temperature
CN135
goes down below 2°C, and signal OFF at the outdoor temperature 4°C.
(Orange)
P.C.B.
CN115
(Black)
*8
*8: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.
*9: The allowable current is 1 A or less.
7. FIELD SETTING
Discharge the static electricity from your body before setting up the DIP switches.
Never touch the terminals or the patterns on the parts that are mounted on the PC
board.
7.1. Field setting switches
Remove the service panel of the outdoor unit and the cover of the electrical component
box to access the PC board of the outdoor unit.
PC board switches for various settings and LED displays are shown in the figure.
7.2. DIP switch setting
7.2.1 List of Settings
SET 5 must be set for the DIP
switch.
Configure the settings before turn-
ing on the power. Settings for SET
1, SET 2, SET 3 and SET 4 DIP
switches are factory default ones. Do
not change them.
DIP switch
Outdoor unit printed circuit board
Status
7.2.2 Terminating resistor setting
Be sure to set the terminal resistor according to specifications.
Set the terminal resistor for every network segment (NS).
If terminal resistor is set in multiple devices, the overall communication system may be
damaged.
If terminal resistor is not set in a device, abnormal communication may occur.
• Be sure to set 1 terminal resistor in a network segment. You can set the terminal resistor
at the outdoor unit or signal amplifier.
• When setting the terminal resistor of a signal amplifier, refer to the installation manual of
the signal amplifier.
• When setting multiple terminal resistors, take note of the following items.
(1) How many network segments are there in a VRF system?
(2) Where will you set the terminal resistors in a network segment? (Condition for 1 seg-
ment: Total number of outdoor and indoor units and signal amplifiers is less than 64,
or the total length of the transmission cable is less than 500 m)
(3) How many outdoor units are connected to 1 refrigerant system?
Configure the setting (DIP switch SET 5)
of the terminal resistor of the outdoor units
as shown below from conditions (1) to (3).
Voltage:
power supply input voltage
cable
(0.82 mm
2
(18AWG))
CAUTION
DIP Switch
SET 1
1-4
Prohibited
SET 2
1-4
Prohibited
SET 3
1-4
Prohibited
SET 4
1-4
Prohibited
1-3
Prohibited
SET 5
4
Terminal resistor setting
LED lamp
Push button
CAUTION
SET 5
Terminal
resistor
4
OFF
Disable
ON
Enable
Base heater *9
Function
7-segment display
Rotary switch
DIP switch
Remarks
—
(Factory setting)
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