SiUS041829E Field Settings
Part 7 Trial Operation and Field Settings 131
4.4 Facility Setting (cooling at low outdoor temperature)
Outline This function is limited only for facilities (the target of air conditioning is equipment such as
computers). Never use it in a residence or office (the space where there is a human).
Details Cutting jumper J6 on the outdoor unit PCB will extend the operation range to –10°C (14°F).
Installing an air direction adjustment grille (sold separately) will further extend the operation
range to –20°C (–4°F). In these cases, the unit will stop operating if the outdoor temperature
falls below –20°C (–4°F), restarting once the temperature rises above this level.
1. Remove the top plate of the outdoor unit. (09/12 class: 3 screws, 18 class: 6 screws)
2. Remove the front plate. (09/12 class: 4 screws, 18 class: 8 screws)
3. Cut the jumper J6 of the PCB inside.
For the location of the jumper, refer to pages 20, 21.
If the outdoor unit is installed where the heat exchanger of the unit is exposed to direct wind,
provide a windbreak wall.
Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off
when using facility settings.
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.
Cutting jumper 6 (J6) sets the indoor fan tap to the highest position. Notify the user about this.
Replace the remote controller if you cut a jumper unintentionally
.
Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them.
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