Fujitsu AOUG12LZAH1 Service Manual page 172

• External heater output
Rotary SW on External
Input and Output PCB
2
B
C
2-4. Details of function
External output
External Input and Output PCB
- (05-20) -
Output
signal
Off → On
CN312
On → Off
2. External input and output
Command
Heater on
Heater off