Field Settings
SiBE041134EB
110
Trial Operation and Field Settings
4.3
Standby Electricity Saving
Outline
This function turns OFF the power supply to the outdoor unit and sets the indoor unit into
standby electricity saving mode, thus reducing the power consumption of the air conditioner.
Detail
For RXS20/25K2V1B, RXS20/25K3V1B, RXS20/25L2V1B, ARXS25L2V1B, the standby
electricity saving function is turned OFF before shipping. The following procedure is
required for turning ON the function.
1. Check that the main power supply is turned OFF. Turn OFF if it has not been turned OFF.
2. Remove the stop valve cover.
3. Disconnect the selective connector for standby electricity saving.
4. Turn ON the main power supply.
Caution
Before connecting or disconnecting the selective connector for standby electricity saving, make
sure that the main power supply is turned OFF.
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
computer)). Never use it in a residence or office (the space where there is a human).
Detail
RXS20/25K2V1B, RXS20/25K3V1B, RXS20/25L2V1B, ARXS25L2V1B
You can expand the operation range to –15°C by cutting the jumper (J4) on the outdoor unit
PCB. Note that the operation may stop if the outdoor temperature drops below –15°C. If the
outdoor temperature rises, the operation starts again.
Main PCB
Caution
Replace the PCB if you accidentally cut a wrong jumper.
Jumpers are necessary for the 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 condensation from the indoor unit outlet vent.
4. Cutting the jumper sets the indoor fan tap to the highest position.
1
2
3
1
2
3
(R13526)
Function OFF
Function ON
Selective connector
S70
S40
S2
S90
J5
J4
J3
(R18253)
Cut the jumper J4.