Auto Operation (Fuzzy Operation) - LG Multi-Inverter Type Service Manual

Part 2 Functions & Controls

6.2 Auto Operation (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.
76°F(24~25°C) ≤ Inatake Air Temp
70°F(21°C) ≤ Inatake Air Temp < 76°F(24~25°C) ➔ Fuzzy Operation for Dehumidification
Inatake Air Temp < 70°F(21°C)
• 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.
6.2.1 Fuzzy Operation for Cooling
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 0.5°C or more below the set-
ting temp, the compressor is turned off. When 0.5°C or more above the setting temp, the compressor is turned on.
Compressor ON Temp ➔ Setting Temp + 1°F(0.5°C)
Compressor OFF Temp ➔ Setting Temp + 1°F(0.5°C)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air
temp at that time.
78°F(26°C) ≤ Intake Air Temp
76°F(24~25°C)≤ Intake Air Temp<78°F(26°C)
72°F(22°C)≤ Intake Air Temp<76°F(24~25°C)
64°F(18°C)≤ Intake Air Temp<72°F(22°C)
Intake Air Temp<64°F(18°C)
• 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 accord-
ing to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the temperature.
6.2.2 Fuzzy Operation for Dehumidification
• According to the setting temperature selected by Fuzzy rule, when the intake air temp is 1°F(0.5°C) or more below the set-
ting temp, the compressor is turned off. When 1°F(0.5°C) or more above the setting temp, the compressor is turned on.
Compressor ON Temp ➔ Setting Temp + 1°F(0.5°C)
Compressor OFF Temp ➔ Setting Temp+1°F(0.5°C)
• At the beginning of Fuzzy mode operation, the setting temperature is automatically selected according to the intake air
temp at that time.
78°F(26°C) ≤ Intake Air Temp
76°(24~25°C) ≤ Intake Air Temp<78°F(26°C)
72°F(22°C) ≤ Intake Air Temp<76°F(24~25°C)
64°F(18°C) ≤ Intake Air Temp<72°F(22°C)
Intake Air Temp<64°F(18°C)
• 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 accord-
ing to the Fuzzy rule.
• While in Fuzzy operation, the airflow speed of the indoor fan repeats the low airflow speed or pause as in dehumidifica-
tion operation.
Copyright ©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
➔ Fuzzy Operation for Cooling
➔ Fuzzy Operation for Heating
➔ 76°F(24~25°C)
➔ Intake Air Temp + 2°F(1°C)
➔ Intake Air Temp + 1°F(0.5°C)
➔ Intake Air Temp
➔ 64°F(18°C)
➔ 76°F(24~25°C)
➔ Intake Air Temp+2°F(1°C)
➔ Intake Air Temp+1°F(0.5°C)
➔ Intake Air Temp
➔ 64°F(18°C)
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LGE Internal Use Only