Design and Technical Manual

6. SYSTEM DESIGN
EXTERNAL INPUT7-1-1.
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 eld 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
z
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)
z
Parts name External connect kit
Model name UT Y-XWZ XZ3
- (06 - 102) -
SYSTEM DESIGN SYSTEM DESIGN