Fujitsu AUUH18LUAS Service Manual page 208

¢ External heater output
External Input and
Function
Output PCB
setting
Rotary switch
60-11
—
Output signal
Off
On
Specifications of the signal output performance are as shown as follows:
Example: →hen set temperature (Ts) is set at 72°F (22°C);
• And room temperature (Tr) increase above 53.6°F (12°C), signal output is on.
• And Tr increase above 69.8°F (21°C), signal output is off.
• And Tr decrease below 66.2°F (19°C), signal output is on.
• And Tr decrease below 50°F (10°C), signal output is off.
The output also turns off in defrost operation.
3-5. Details of control output function
— Output of indoor unit
External Input and
2, B, C
Output PCB
On Heater turns on as shown in diagram of heating temperature
Heater turns off as shown in diagram of heating temperature
• Other than Heating mode
Off • Error occurred
• Forced thermo off
• Fan stop protection
Tr-Ts=-1.8 °F (-1 °C)
Tr-Ts=-18 °F (-10 °C)
External output
CN47
Ex OUT 3
Condition
Tr-Ts
Off
Tr-Ts=-5.4 °F (-3 °C)
On
Tr-Ts=-22 °F (-12 °C)
Off
- (05-26) -
Output signal Control
Off On Heater on
On Off Heater off
Off On Heater on
On Off Heater off
3. External input and output (for indoor unit)