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Only for training and service purposes
LGE Internal Use Only
Operation Details
• When the intake air Temp. reaches Compressor OFF Temp., the compressor is turned off.
When the intake air Temp. reaches Compressor ON Temp., the compressor is turned on.
Themo ON Temp. => Setting Temp. +2˚C(36°F)
Themo OFF Temp. => Setting Temp.+4°C(39°F)
• While in compressor on, when above 38°C(100°F), it operates with setting airflow speed (while in sleep mode,
with the medium airflow speed).
• While in compressor off, the indoor fan is off when the indoor pipe temp is below 33°C (92°F), when above
35°C(94°F) , it operates with the low airflow speed.
• While in defrost control, both of the indoor and outdoor fans are turned off.
n Defrost Control
• While in heating mode operation in order to protect outdoor unit from freezing, reversed to cooling cycle to
defrost of the outdoor unit.
n Fuzzy Operation (Outdoor unit C/O Model)
• According to the temperature set by Fuzzy rule, when the intake air temp is 0.5°C(33°F) or more below the
setting temp, the compressor is turned off. When 0.5°C(33°F) or more above the setting temp, the compres-
sor is turned on.
Compressor ON Temp => Setting Temp+0.5°C(33°F)
Compressor OFF Temp => Setting Temp+0.5°C(33°F)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the
intake air temp at that time.
26°C(78°F) ≤ Intake Air Temp => 25°C(76°F)
24°C(76°F) ≤ Intake Air Temp < 26°C(78°F) => Intake Air Temp+1°C(34°F)
22°C(72°F) ≤ Intake Air Temp<24°C(76°F) => Intake Air Temp+0.5°C(33°F)
18°C(64°F) ≤ Intake Air Temp<22°C(72°F) => Intake Air Temp
Intake Air Temp<18°C(64°F) => 18°C(64°F)
• When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the
Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature
automatically according to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temper-
ature
n Fuzzy Operation (Outdoor unit H/P Model)
• 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(76°F) ≤ Inatake Air Temp => Fuzzy Operation for Cooling
21°C(70°F)≤ Inatake Air Temp<24°C(76°F) => Fuzzy Operation for Dehumidification
Inatake Air Temp<21°C(70°F) => Fuzzy Operation for Heating
• If any of the operation modes among cooling / dehumidification / heating mode operations is carried out for 10
sec or longer before Fuzzy operation, the mode before Fuzzy operation is operated.
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