Field Settings
SiENBE07-618_C
128
Trial Operation and Field Settings
2.2
Facility Setting Switch (cooling at low outdoor
temperature)
Outline
For Cooling Only Model
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 turning on the switch (SW4-B) on the service
monitor 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. Use the indoor unit at the highest level of airflow rate.
2.3
Jumper and Switch Settings
For the location of the jumper, refer to page
14
.
For the location of the switch, refer to page
16
.
LED-A
SW4
ON
AB
C
D
S102
SW1
S2
(R12157)
Turn on the
switch SW4-B.
Jumper
Function
When connected
(factory set)
When cut
JB
(on indoor unit PCB)
Fan speed setting
when compressor
stops for thermostat
OFF. (effective only
at cooling operation)
Fan speed setting ;
remote control
setting
Fan speed setting; “0” (The fan
stops.)
JC
(on indoor unit PCB)
Power failure
recovery function
Auto-restart
The unit does not resume
operation after recovering from a
power failure. Timer settings are
cleared.
Switch
Function
OFF (factory set)
ON
SW4-C
(on outdoor unit PCB)
Improvement of
defrost
performance
Standard control
Reinforced control (ex. The
frequency increases, the
duration time of defrost
lengthens.)
SIENBE07-618_C_FRONT.pdf 140
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