Fujitsu ARU12RLF, Design & Technical Manual

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6. SYSTEM DESIGN
EXTERNAL INPUT 7-1-1.
ON/OFF of the "Low noise mode", "External input priority mode", "Peak cut mode", and "Stop
operation mode" functions can be enable with an external field device.
LOW NOISE MODE
The following reduces the operating sound of the outdoor unit from the normal sound. •
The air conditioner is set to the "Low noise mode" when closing the contact input of a commercial
timer or ON/OFF switch to a connector on the outdoor control PC board.
* Performance may drop depending on the outside air temperature condition, etc.
Circuit diagram example
Outdoor unit
control PC board
Connector
1
2
Signal
Field supply
*33ft. (10m)
Connected unit
Ex.) Switch
Contact capacity : 24VDC or more, 10mA or more.
* Make the distance from the PC board to the connected unit within 33ft (10m).
Use the following parts and construct a circuit as shown above. •
Input Signal···ON : Low noise mode, Input Signal···OFF : Normal operation •
* Set the "Low noise mode" level, refer to "5.FUNCTION SETTING".
ON
OFF
ON
OFF
Input Signal
Low noise mode
Parts (Optional)
Parts name External connect kit
Model name UTY-XWZXZ3
- (06 - 90) -
SY
S
T
E
M
DE
SIGN
SY
S
T
E
M
DE
SIGN