Facility Setting Switch (Cooling At Low Outdoor Temperature); Jumper And Switch Settings - Daikin H Series Service Manual

Field Settings
4.4 Facility Setting Switch (cooling at low outdoor
temperature)
Outline
This function is limited to facilities where the target of air conditioning is equipment Never use it in a
residence or office occupied by people.
 You can expand the cooling operation range from –10°C (14°F: normal operation) to –15°C
Detail
 When the target fan speed determined by the control to maintain pressure difference remains under
Caution 1. If the outdoor unit is installed where the outdoor heat exchanger of the unit is exposed to direct
2. Intermittent noises may be produced by the indoor unit due to the outdoor fan turning on and off
3. Do not place humidifiers or other items which might raise the humidity in rooms where facility
4. Use the indoor unit at the highest level of airflow rate.
4.5

Jumper and Switch Settings

Jumper
JB (on indoor unit
PCB)
JC (on indoor
unit PCB)
Switch
SW4-C (on
outdoor unit
PCB)
For the location of the jumper and the switch, refer to the following pages.
Indoor unit; page 8
Outdoor unit; page 11
Trial Operation and Field Settings
(5°F: cooling at low outdoor temperature setting) by turning on the switch (SW4-B) on the
outdoor unit PCB.
150 ~ 250 rpm (depending on the model) for about 30 seconds, the fan is turned off to maintain the
pressure difference. When the pressure difference returns to high again, the fan starts to rotate again.
S102
S2
LED-A
SW4
SW1
wind, provide a windbreak wall.
when using facility settings.
settings are being used.
A humidifier might cause dew jumping from the indoor unit outlet vent.
Function
Fan speed setting when compressor
stops for thermostat OFF. (effective
only at cooling operation)
Power failure recovery function
Function
Improvement of defrost
performance
Turn on
the switch
SW4-B.
When connected
(factory set)
Fan speed setting;
Remote controller
setting
Auto-restart
OFF (factory set)
Standard control
SiUS04-924_A
(R14478)
When cut
Fan rpm is set to "0" <Fan stop>
The unit does not resume operation
after recovering from a power failure.
Timer ON/OFF settings are cleared.
ON
Reinforced control (ex. The frequency
increases, the duration time of defrost
lengthens.)
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