Using External Control Function(Option) - Samsung FH052EAMC Installation Manual

Using external control function (Option)
18
E-
On/Off control by inputting external signal
CN44 WHT CN 51
C B
Input
Error Comp
A. Switch for setting external control function
K11 : ON(The external control function is not used)
OFF(The external control function is used)
The 'external control input port' or 'external control output port' is used
depending on the setting.
B. External control input port(CN51)
It turns on or off the indoor unit using the External Relay Timer or Relay Switch.
Specifications of the external input signal
- Input signal : Relay Timer
- Debounce Time : 100ms or more
- Function : The indoor unit turns on or off by the external Timer signal.
The air conditioner starts up in the mode selected when the unit
was last used. (DCS mode included)
C. External control output port(CN44)
It outputs the operation state of the outdoor unit compressor and error when
the external control function is in use.
Specifications of the external input signal
- Voltage range : maximum 30V DC, 250V AC
- Current range : maximum 3A
WHT
SW05
A
K9 K10 K11 K12