Service manual

Field Settings SiBE041134
168 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
energy-saving mode, thus reducing the power consumption of the air conditioner.
Detail 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 Jumper (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 You can expand the operation range to –15°C by cutting the jumper on the outdoor unit PCB. If
the outdoor temperature falls to –20°C or lower, the operation stops. If the outdoor temperature
rises, the operation starts again.
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 jumping 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
1
2
3
S70
S40
S2
S90
J5 J4 J3
(R12187)
Cut the jumper J4.