LG ARNU Series, Service Manual

Page: 24 / 226

24 Indoor Unit
3. Operation Detail
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Time Delay Safety Control
• 5 sec... Vertical air flow direction control louvers open in 5 seconds to prevent noise between louvers and wind.
• 5 sec... The 4-way valve is ceased for 5 sec. to prevent the refrigerant-gas abnormal noise when the Heating
operation is OFF or switched to the other operation mode when compress is off.
While compressor is running, it takes 3~5 seconds to switch.
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Auto Swing Control
• This function is to swing the louver up and down automatically.
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Soft-Dry Operation
• The indoor fan speed is automatically set to the low, so the shift of the indoor fan speed is impossible because of
already being set to the best speed for Dry Operation by microcontroller control.
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Cooling Mode Operation
• When selecting the Cooling( ) Mode Operation, the unit will operate according to the setting by the remote con-
troller and the operation diagram is as following
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Swirl Swing Control
Vane 2, 4 is almost vane closed while vane1, 3 is opened.
Vane 1, 3 and vane 2,4 turn over minutely
Intake Air Temperature
COMP. ON
(SET TEMPE0.5°C)
COMP. OFF
(SET TEMPERATURE -0.5°C)
More than More than
3 minutes 3 minutes
Selected Selected Selected
Speed Speed Speed
INDOOR FAN Low Low
(1) The function of main control
Operation Detail
Vane 2
Vane 1 Vane 3
Vane 4