Facility Setting (Cooling At Low Outdoor Temperature) - Daikin RX15WMVJU9 Installation Manual

Facility Setting (cooling at low outdoor temperature)

WARNING
• Make sure to turn the power OFF before performing work.
CAUTION
• 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 condensation from the indoor unit outlet vent.
• Activating the facility setting sets the indoor fan tap to the highest position. Notify the user about this.
This function is designed for facilities such as equipment or computer rooms. It is never to be used in a
residence or office where people occupy the space.
RX15/18/24, RXL15 models
„ Cutting jumper 6 (J6) 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.
1) Remove the top plate of the outdoor unit. (6 screws)
2) Remove the front plate. (8 screws)
3) Remove the anti-drip cover.
4) Cut the jumper (J6) of the PCB inside.
Top plate
RX30/36, RK30/36, RXL18/24 models
„ 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.
1) Remove the service lid. (2 screws)
2) Remove the switch cover. (1 screw)
3) Turn on SW5-3.
Only for cooling models
„ In addition to turning on SW5-3, turning on SW6-2 as well on the PCB will
extend the operation range to -22°F (–30°C). The unit will stop operating if the
outdoor temperature falls below –22°F (–30°C), restarting once the
temperature rises above this level.
1) Turn on SW6-2 in addition to SW5-3.
NOTE
When the outdoor temperature is below –4°F (–20°C) and if SW6-2 in this step is
turned on, for the purpose of protecting the compressor, it may take up to 3 hours
for operation to begin while the system warms up.
11
Anti-drip cover
Front plate
Remove
the switch
Screw
cover.
PCB
Turn on switch 3.
SW5
Cut jumper J6.
ON
OFF
PCB
Turn on switch 2.
SW6
ON
OFF
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