LG LS-J0762YL / S07LHN Service Manual ▷ View online
MODEL : LS-J0762YL/NM/NN/NQ(AC)
LS-L1262YL/NM/NN/NQ(AC)
LS-Q096AUL/BUL/CUL(DC)
LS-R126AUL/BUL/CUL(DC)
LS-Q096AUL/BUL/CUL(DC)
LS-R126AUL/BUL/CUL(DC)
Room Air Conditioner
SERVICE MANUAL
CAUTION
-
BEFORE SERVICING THE UNIT, READ THE SAFETY
PRECAUTIONS IN THIS MANUAL.
PRECAUTIONS IN THIS MANUAL.
-
ONLY FOR AUTHORIZED SERVICE PERSONNEL.
E-MAIL
Contents
Functions .................................................................................................................................3
Product Specification (Cooling & Heating)...........................................................................6
Dimensions ..............................................................................................................................7
Refrigeration Cycle Diagram ..................................................................................................9
Wiring Diagram......................................................................................................................10
Operation Details ..................................................................................................................11
Installation .............................................................................................................................25
Operation ...............................................................................................................................38
Disassembly of the parts (Indoor Unit) ...............................................................................39
2-way, 3-way Valve.................................................................................................................42
Cycle Troubleshooting Guide...............................................................................................49
Self-diagnosis function.........................................................................................................50
Electronic Parts Troubleshooting Guide.............................................................................52
Electronic Control Device.....................................................................................................62
Schematic Diagram ...............................................................................................................65
Exploded View and Replacement Parts List.......................................................................68
-2-
Functions
• Room temperature sensor. (Thermistor)
• Pipe temperature sensor. (Thermistor)
• Pipe temperature sensor. (Thermistor)
• Maintain the room temperature in accordance with the Setting Temp.
• Indoor fan is delayed for 5 sec at the starting.
• Restarting is for approx. 2 minutes.
• Super High, High, Med, Low
--- Lights up in operation
--- Lights up in Sleep Mode
--- Lights up in Timer Mode
--- Lights up in Preheat Mode (for Heating Model)
--- Lights up in Plasma Air Clean Mode
• Intermittent Operation of fan at low speed or off.
• The fan is switched to low(Cooling), low(Heating) speed.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The unit will be stopped after 1, 2, 3, 4, 5, 6, 7 hours.
• The fan is switched to intermittent or irregular operation
• The fan speed is automatically switched from high to low speed.
• The fan speed is automatically switched from high to low speed.
• The louver can be set at the desired position or swing
up and down automatically.
Indoor Unit
Operation ON/OFF by Remote controller
Sensing the Room Temperature
Room temperature control
Starting the Current Control
Time Delay Safety Control
Indoor Fan Speed Control
Operation indication Lamps (LED)
Soft Dry Operation Mode
• Both the indoor and outdoor fan stops
during defrosting.
• The indoor fan stops until the
evaporator pipe temperature will be
reached at 34°C.
reached at 34°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
PLASMA
-3-
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
• The function will be operated while in any
operation mode with selecting the function.
• The function is to be stopped while it is
operating with selecting the function.
PLASMA
-4-
• If power is on, it will operate to chage capacitor on controller and power relay will operate after about
2~5sec.
• If outdoor temp. is below 0°C, preheater is operating for 1~5min.
• At the initial, It will be operated compressor after 1min. for preheating.
• At the initial, It will be operated compressor after 1min. for preheating.
• The active power filter is designed to correct power factor(cos
θ
) and to regulate DC link voltage.
• It will be operated PFC circuit when the compressor freq. is over 30Hz and wattage is over 450 watt.
• The final operating freq. of comp. is set the lowest freq. that limited outdoor temp., discharge pipe temp.,
heat-sink temp., target freq., owing to CT.
• When the temp. of power module increases to 85°C, controller decreases Freq. of Comp.
• It will be changed the drive freq. of comp. according to temp. of indoor and outdoor.
• It will be changed the drive voltage of comp. according to operating frequency.
• It is only operated in the heating operation mode except defrosting operation.
• High speed
- Although fan motor speed is middle, it will change high speed in case of below AC193V, over 45°C of
outdoor temp., and over fc, fh of comp. Freq.
• Middle speed
- Nomal mode
• Low speed
- Although fan motor speed is middle, it will change Low speed in case of over AC 270V, over 21°C
(Heating Mode) of outdoor temp. below 24°C (Cooling Mode) of outdoor temp.
Outdoor Unit
Power relay control
Stand by control at low temp.
Active power filter control(PSC)
Comp. Freq. control
Overheatng. Protection(Power module)
Freq. speed control(up/down speed)
V/F control
Total current control (over current protection)
DC peak current control
4 way valve control
Outdoor fan motor control
Discharge pipe temp. control
