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Model: AS-C0764DM0 AS-H0764DM0 LS-C1264DM0 LS-H0764DM0 AS-C0964DM0 AS-H0964DM0 LS-C1865DM0 LS-H0964DL0 AS-C1264DM0 AS-H1264DM0 LS-C2665DM0 LS-H1264DM0 AS-C1865DM0 AS-H1865DM0 LS-C0964DA0 LS-H1865DM0 AS-C2465DM0 AS-H2465DM0 LS-C0964DM0 LS-H2665DM0 AS-C0764DB0 AS-H0764GM0 LS-C1865DB0 LS-H2465DM0 AS-C0964DB0 AS-H0964GM0 LS-C1264DA0 LS-H0964DM0 AS-C1264DB0 AS-H1264GM0 LS-C2465DB0 AS-C1865DB0 AS-H1865GM0 LS-C2465GB0 AS-C2465DB0 AS-H2465GM0 LS-C1865DM1 LS-C1865GB0 LS-C2665DM1 AS-C0764DH0 AS-C0964DH0 AS-C1264DH0 AS-C1865DH0 AS-C2465DH0 AS-C0964DA0 AS-C1264DA0 AS-C0964GA0 AS-C1264GA0 AS-C1865GB0 AS-C2465GB0 AS-H0964DA0 AS-H1264DA0 AS-H1865DB0 LS-C1264DM1 AS-H2465DB0 LS-C1264GA0 AS-H0964GA0 LS-C1264GB0 AS-H1264GA0 LS-C0964DM1 AS-H1865GB0 AS-H2465GB0 AS-H2465DM1 LS-H0964DY0 LS-H1264DY0 LS-H1865DY0 LS-H2465DY0 LS-H0764DM1 LS-H0964DM1 LS-H1264DM1 LS-H1865DM1 LS-H2465DM1 LS-H2665DM1 LS-H2465GB0 LS-H0964GB0 LS-H1264GB0
Pages: 105
Size: 7.49 MB
Type: PDF
Document: Service Manual
Brand: LG
Device: Air Conditioner
File: as-c0764dm0-as-h0764dm0-ls-c1264dm0-ls-h0764dm0-as.zip
Date: 2018-11-20

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Service Manual  29
Operation 
Function of Controls
Operation 
• DISPLAY
1) C/O Model 
Operation Indicator
• ON while in appliance operation, OFF while in appliance pause.
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Timer Indicator
• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Comp. Running Incidator
• While in appliance operation, ON while in outdoor unit compressor running, OFF while in compressor off.
2) H/P Model
Operation Indicator
• ON while in appliance operation, OFF while in appliance pause.
• Flashing while in disconnection or short in Thermistor. (3 sec off / 0.5 sec on)
Timer Indicator
• ON while in timer mode (on/off), OFF when timer mode is completed or canceled.
Defrost Indicator
• OFF except when hot start during heating mode operation or while in defrost control.
■
Cooling Mode Operation
• When the intake air temperature reaches 0.5°C below the setting temp, the compressor and the outdoor fan
stop.
• When it reaches 0.5°C above the setting temp, they start to operate again.
Compressor ON Temp 
➲ 
Setting Temp+0.5°C
Compressor OFF Temp
➲
Setting Temp-0.5°C
• While in compressor running, operating with the airflow speed set by the remote control. While in compressor
not running, operating with the low airflow speed regardless of the setting.
■
Healthy Dehumidification Mode
• When the dehumidification operation input by the remote control is received, the intake air temperature is
detected and the setting temp is automatically set according to the intake air temperature.
26°C 
≤
Intake Air Temp     
➲ 
25°C
24°C 
≤
Intake Air Temp<26°C
➲ 
Intake Air Temp-1°C
18°C 
≤
Intake Air Temp<24°C
➲ 
Intake Air Temp-0.5°C
Intake Air Temp<18°C
➲ 
18°C

30 Room Air Conditioner
Operation 
• While in compressor off, the indoor fan repeats low airflow speed and pause.
• While the intake air temp is between compressor on temp. and compressor off temp., 10-min dehumidification
operation and 4-min compressor off repeat.
Compressor ON Temp.
➲
Setting Temp+0.5°C
Compressor OFF Temp.
➲
Setting Temp-0.5°C
• In 10-min dehumidification operation, the indoor fan operates with the low airflow speed.
■
Heating Mode Operation
• When the intake air temp reaches +3°C above the setting temp, the compressor is turned off.  When reaches
the setting temp, the compressor is turned on.
Compressor ON Temp.
➲
Setting Temp.
Compressor OFF Temp.
➲
Setting Temp.+3°C 
• While in compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C, when above 28°C , it
operates with the low or setting airflow speed. When the indoor pipe temp is between 20°C and 28°C, it oper-
ates with Super-Low(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, when above 35°C , it
operates with the low airflow speed.
• If overloaded while in heating mode operation, in order to prevent the compressor from OLP operation, the
outdoor fan is turned on/off according to the indoor pipe temp.
• While in defrost control, both of the indoor and outdoor fans are turned off.
■
Defrost Control
• While in heating mode operation in order to protect the evaporator pipe of the outdoor unit from freezing,
reversed to cooling cycle to defrost the evaporator pipe of the outdoor unit.
• After 40 min heating mode operation, at 4 min interval, whether to carry out defrost control or not and the time
of defrost control are determined according to the following conditions.
1) While in heating mode operation, the maximum of the indoor pipe temperature is measured and it is com-
pared with the present indoor pipe temperature to get the difference of the indoor pipe temperatures (=the
maximum temperature of indoor pipe ? the present temperature of indoor pipe), according to which, whether
to carry out defrost control or not is determined.
2) According to the need of defrost control shown above and the elapsed time of heating mode operation at that
moment, the defrost control time is determined.
3) When the determined time of defrost control is below 7 min, heating mode operation continues without carry-
ing out defrost control. According to the procedure stated above, the determination is made again. When the
defrost control time is 7 min or longer, defrost control is then carried out.
• While in defrost control, the minimum temp of the indoor pipe is measured and it is compared with the present
temp of the indoor pipe to get the difference of the indoor pipe temperatures (=the present temperature of the
indoor pipe ? the minimum temperature of the indoor pipe).  When the difference is 5°C or higher, defrost con-
trol is completed and heating mode operation is carried out.
• While in defrost control, if the defrost time determined before the start of defrost control is completed, defrost
control stops and heating mode operation is carried out regardless of  the above condition.
• When the indoor pipe temp is 42°C or above, defrost control is not carried out even if the condition is one of
the defrost conditions above.
• While in defrost control, the compressor is on and the indoor fan, the outdoor fan, and the 4 way valve are off.

Service Manual  31
Operation 
■ 
Airflow Speed Selection
• The airflow speed of the indoor fan is set to high, medium, low, or chaos (auto) by the input of the airflow
speed selection key on the remote control.
■ 
Sleep Timer Operation
• When the sleep time is reached after <1,2,3,4,5,6,7,0(cancel) hr> is input by the remote control while in appli-
ance operation,  the operation of the appliance stops.
• While the appliance is on pause, the sleep timer mode cannot be input.
• While in cooling mode operation, 30 min later since the start of the sleep timer, the setting temperature
increases by 1°C.  After another 30 min elapse, it increases by 1°C again.
• When the sleep timer mode is input while in cooling cycle mode, the airflow speed of the indoor fan is set to
the low.
• When the sleep timer mode is input while in heating cycle mode, the airflow speed of the indoor fan is set to
the medium.
■ 
Chaos Natural Wind Mode
• When the Chaos Natural Wind mode is selected and then operated, the high, medium, or low speed of the air-
flow mode is operated for 2~15 sec. randomly by the Chaos Simulation.
■ 
Jet Cool Mode Operation (C/O Model)
• If the Jet Cool key is input at any operation mode while in appliance operation, the Jet Cool mode operates.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then
operated in order that the air outflow could reach further.
■ 
Jet Cool Mode Operation (H/P Model)
• While in heating mode or Fuzzy operation, the Jet Cool key cannot be input.  When it is input while in the
other mode operation (cooling, dehumidification, ventilation), the Jet Cool mode is operated.
• In the Jet Cool mode, the indoor fan is operated at super-high speed for 30 min at cooling mode operation.
• In the Jet Cool mode operation, the room temperature is controlled to the setting temperature, 18°C.
• When the sleep timer mode is input while in the Jet Cool mode operation, the Jet Cool mode has the priority.
• When the Jet Cool key is input, the upper/lower vanes are reset to those of the initial cooling mode and then
operated in order that the air outflow could reach further.
■
Forced Operation 
• Operation procedures when the remote control can't be used.
• The operation will be started if the power button is pressed.
• If you want to stop operation, re-press the button.
• While in forced operation, the key input by the remote control has no effect and the buzzer sounds 10 times to
indicate the forced operation.
Heat pump Model
Cooling Model
Room Temp. 
≥
24°C 21°C 
≤
Room Temp. < 24°C Room Temp. < 21°C
Operating mode
Cooling
Cooling
Healthy Dehumidification
Heating
Indoor FAN Speed
High
High
High
High
Setting Temperature
22°C
22°C
23°C
24°C

32 Room Air Conditioner
Operation 
■
Test operation
• 
During the TEST OPERATION, the unit operates in cooling mode at high speed fan, regardless of room tem-
perature and resets in 18±1 minutes.
•
During test operation, if remote controller signal is received, the unit operates as remote controller sets.
If you want to use this operation, open the front panel upward and Press the power button let it be pressed for
about 3 seconds.
• 
If you want to stop the operation, re-press the button.
■
Auto restart
• 
In case the power comes on again after a power failure, Auto Restarting Operation is the function to operate
procedures automatically to the previous operating conditions.
■
Protection of the evaporator pipe from frosting
• If the indoor pipe temp is below 0°C in 7 min. after the compressor operates without any pause while in cool-
ing cycle operation mode, the compressor and the outdoor fan are turned off in order to protect the indoor
evaporator pipe from frosting.
• When the indoor pipe temp is 7°C or higher after 3 min. pause of the compressor, the compressor and the
outdoor fan is turned on according to the condition of the room temperature.
■
Buzzer Sounding Operation
• When the appliance-operation key is input by the remote control, the short "beep-beep-" sounds.
• When the appliance-pause key is input by the remote control, the long "beep—" sounds.

Display

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