Field Settings for Outdoor Unit
SiUS091601EA
217
Part 7 Trial Operation and Field Settings
Reference
Caution
Caution
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
Summary of Contents for FDMQ12RVJU
Page 18: ...SiUS091601EA 13 Part 2 Specifications 1 Specifications 14 Part 2 Specifications ...
Page 198: ...Check SiUS091601EA 193 Part 6 Service Diagnosis 18 24 class R24538 1 2 3 4 Multimeter ...
Page 201: ...SiUS091601EA Check Part 6 Service Diagnosis 196 18 24 class R24539 DC DC W V U ...
Page 229: ...SiUS091601EA Piping Diagrams Part 8 Appendix 224 RXL15QMVJU RXL18UMVJU 3D100007 3D123368 ...
Page 230: ...Piping Diagrams SiUS091601EA 225 Part 8 Appendix RXL24UMVJU 3D107985A ...
