Design Technical Manual

Table Of Contents
1-1-2. EXTERNAL OUTPUT
Connector Output voltage Status
CN136 (Black) 0 V Normal
DC 12-24 V *1 Error
CN137 (Blue) 0 V Stop
DC 12-24 V *1 Operation
ERROR STATUS (Master unit only)
This output indicates the outdoor unit and connected indoor unit's "Normal" or "Error" status.
OPERATION STATUS (Master unit only)
This output indicates the outdoor unit's "Operation" status.
*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 24V across
pins 1-2.
1
2
+
+
-
-
CN136
(Black)
or CN137
(Blue)
connected unit
DC power supply
(External) 12 - 24 V
Connected
load (Operation
Indicator or Error
Indicator)
*3
*1
*2
P.C . B
CN137
Output
CN136
Output
Operation
Error
12 - 24 V
12 - 24 V
0V
0V
Stop
Normal
*A twisted pair cable (22AWG) should be used. Maximum length of cable is 492 ft. (150 m).
* Use an external input and output cable with appropriate external dimension, depending on the
number of cables to be installed.
BASE HEATER
This is the output signal for base heater. Output signal ON, when the outdoor temperature
goes down below 36°F (2°C), and signal OFF at the outdoor temperature 39°F (4°C).
*4: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.
*5: The allowable current is 1 A or less.
1
2
3
4
CN115
(Black)
Voltage: power supply
input voltage
Base heater
*5
*4
P.C . B
AWG18 (0.82 mm
2
)
- (08 - 05) -
EXTERNAL INPUT
& OUTPUT
EXTERNAL INPUT
& OUTPUT