En-37
External output
101 31
Wiring of connector
101 31 11
When installing connection cable, specified part (optional parts) must be used.
Output
Connector
1
2
Vcc
+
+
-
Vcc
1
2
CN951
CN952
Circuit diagram example
Outdoor unit
control PC board
Connected unit
(Field supply)
Connection
cable
Signal
*10m (33ft)
Connector
Load
Power
supply
Error status
CN951
Compressor status
CN952
* Make the distance from the PC board to the
connected unit within 10m (33ft).
1) Power supply
• Voltage (Chart sign=Vcc) : DC 24V or less
2) Load
• Load : DC 500mA or less is recommended
Error status output (CN951)
101 31 21
An air conditioner error status signal is produced
when a malfunction occurs.
Error status
Output signal
Error
ON
Normal
OFF
Compressor status output (CN952)
101 31 31
Compressor operation status signal is produced
when the compressor is running.
Comressor status
Output signal
Operation
ON
Stop
OFF
Base heater
101 31 41
A Base heater is a heating element that may be installed to melt the ice that may accumulate in the
condenser, drain pan.
When installing connection cable, specified part (optional parts) must be used.
This output signal is produced when the outdoor temperature drop down to 2°C (36°F), and releases at
4°C (39°F).
Circuit diagram example
1
2
3
4
AC240V
*2
*1
P.C.B
1
2
3
4
AC240V
*3
*1
P.C.B
CN206
CN206
connected unit
connected unit
Base heater
Base heater
Connector
Connector
*1: Connect to pin 1 and pin 3. No connection pin 2 and pin 4.
*2: The allowable power consumption is 25W or less.
*3: If a load greater than 25W is applied, a contactor or relay should be used to operate and control the
base heater.
9379069342-02_IM.indb 37
17/5/2556 11:50:02
