Fujitsu ARXG45KHTA Service Manual page 140

¢ Auxiliary heater output
→hen indoor unit fan and compressor is turned on in heating operation, the signal is output from
connector.
Specifications of the signal output performance are as shown as follows:
Example: →hen 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.
 Fan delay setting
This is used to continue the indoor unit fan operation for 1 minute after thermo OFF in heating
mode.
For the detail setting on fan delay setting, refer to "Function settings on indoor unit" in
settings for indoor unit"
 Circuit diagram example
12 V
• *: Make the distance from the PCB to the connected unit within 10 m.
• Relay spec: Rated DC 12 V, 50 mA or less.
Heating
operation
Indoor unit fan
Output signal
CAUTION
• Place an external heater between the indoor unit and the outlet.
• Be sure to use delay control of the fan.
3-3. External output
on page 05-1.
Indoor unit
control PCB
Example: Relay unit
Connector
1
On/Off
2
*10 m
Operation
Stop
On
Off
On
Off
Supply air
Tr-Ts = -1 °C
Tr-Ts = -10 °C
Connected unit
Signal
Locally purchased
Indoor
External
unit
heater
Return air
- (05-14) -
Tr-Ts
OFF
Tr-Ts = -3 °C
ON
Tr-Ts = -12 °C
OFF
"Function
Example: Heater
Relay
power
supply
1 min
3. External input and output for indoor unit