Fujitsu ARYG72LHTA Service Instruction page 107

 External heater output
Function Rotary SW of External
setting / input and output PCB
60-11 / D
60-00 / 2
60-09 / B
6 0 1 - 0 /
Output signal
Low → High
Off → On
High → Low
On → Off
Specifications of the signal output performance are as shown as follows:
Example: When set temperature (Ts) is set at 22 °C;
• And room temperature (Tr) increase above 12 °C, signal output is on.
• And Tr increase above 21 °C, signal output is off.
• And Tr decrease below 19 °C, signal output is on.
• And Tr decrease below 10 °C, signal output is off.
The output also turns off in defrost operation.
Output of indoor unit
External input and output
C
Heater turns on as shown in diagram of heating temperature
Heater turns off as shown in diagram of heating temperature
• Other than Heating mode
• Error occurred
• Forced thermo off
• Fan stop protection
Tr-Ts=-1°C
Tr-Ts=-10°C
External output
CN47
Output 3
PCB
Condition
Tr-Ts
Off
Tr-Ts=-3°C
On
Tr-Ts=-12°C
Off
03-20
Output
Command
signal
Low → High Heater on
High → Low Heater off
Off → On Heater on
O n → Off Heater off