Field Settings SiUS041501E
107 Trial Operation and Field Settings
3.3 Facility Setting Switch (cooling at low outdoor
temperature) (Only for RK(X) series)
Outline This function is limited to use for facilities (where the target of air conditioning is equipment, such as
in a server room). Never use it in a residence or office where there are people present.
Detail You can expand the operation range to –15°C (5°F) by cutting the jumper on the outdoor unit PCB.
Note that the operation may stop if the outdoor temperature drops below –15°C (5°F). If the outdoor
temperature rises, the operation starts again.
For the location of the jumper, refer to page 20, 21.
Caution Replace the PCB if you accidentally cut a wrong jumper.
Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them.
Caution 1. If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct
wind, provide a windbreak wall.
2. Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off
when using facility settings.
3. Do not place humidifiers or other items which might raise the humidity in rooms where facility
settings are being used.
A humidifier might cause dew jumping from the indoor unit outlet vent.
4. Cutting jumper sets the indoor fan tap to the highest position.
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