Field Settings for Outdoor Unit SiUS091601EA
217 Part 7 Trial Operation and Field Settings
6. Field Settings for Outdoor Unit
6.1 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 09/12/15 class
Cutting jumper 6 (J6) on the circuit board will expand the operation range down to 5°F (–15°C).
However it will stop if the outdoor temperature drops below –4°F (–20°C) and start back up once
the temperature rises again.
(1) Remove the top plate of the outdoor unit. (09/12 class: 3 screws, 15 class: 6 screws)
(2) Remove the front plate. (09/12 class: 4 screws, 15 class: 8 screws)
(3) Cut the jumper (J6) of the PCB inside.
18/24 class
Turning on SW5-3 on the PCB will extend the operation range to 14°F (–10°C).
Installing an air direction adjustment grille (sold separately) will further extend the operation
range to –4°F (–20°C). In these cases, the unit will stop operating if the outdoor temperature
falls below –4°F (–20°C), restarting once the temperature rises above this level.
R7000285
For the location of the jumper, refer to pages 34, 36, 38.
Replace the PCB if you cut a jumper unintentionally.
Jumpers are necessary for electronic circuit. Improper operation may occur if you cut any of them.
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 sets the indoor fan tap to the highest position.
PCB
HEAT
COOL
4
3
2
1
6
5
E
D
C
B
A
4
3
ON
OFF
2
1
SW5
Turn on switch 3
Screw
Remove
the switch
cover
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