LG LMU240HE Service Manual - Page 41
Defrost ControlHeating, Fuzzy Operation
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Operation 27°C(80.6°F), it operates with Super-Low(while in sleep mode, with the medium airflow speed). • While compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4°F), when above 35°C(95°F) , it operates with the low airflow speed. • While in defrost control, the indoor is outdoor fans are turned off. I Defrost Control(Heating) • Defrost operation is controlled by timer and sensing temperature of outdoor pipe. • The first defrost starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 35 minutes passed from starting of heating operation and more than 4 minutes operation of compressor. • Defrost ends after 12 minutes passed from starting of defrost operation when the outdoor pipe temperature rises over 15°C(59°F) even before 12 minutes. • The second defrost starts only when the outdoor pipe temperature falls below -6°C(21.2°F) after 35 minutes passed from ending of the first defrost and more than 4 minutes operation of compressor. I Fuzzy Operation • When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off, the operation mode is selected. • When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the indoor fan is operated for 15 seconds. Then an operation mode is selected according to the intake air temp at that moment as follows. 24°C(75.2°F) ≤ Inatake Air Temp ➲ Fuzzy Operation for Cooling 21°C(69.8°F) ≤ Inatake Air Temp