LG LS-J0760NL / LS-J0820NL / LS-J0961NL_NT / LS-L1220NL / LS-L1260NL_NT Service Manual ▷ View online
MODEL : LS-J0760NL
LS-J0961NL/NT
LS-L1260NL/NT
LS-J0820NL
LS-L1220NL
LS-L1260NL/NT
LS-J0820NL
LS-L1220NL
Room Air Conditioner
SERVICE MANUAL
Contents
Functions .................................................................................................................................3
Product Specification (Cooling & Heating)...........................................................................6
Dimensions ..............................................................................................................................7
Refrigeration Cycle Diagram ..................................................................................................9
Wiring Diagram......................................................................................................................10
Operation Details ..................................................................................................................11
Installation .............................................................................................................................26
Operation ...............................................................................................................................40
Disassembly of the parts (Indoor Unit) ...............................................................................41
2-way, 3-way Valve.................................................................................................................44
Cycle Troubleshooting Guide...............................................................................................51
Self-diagnosis function.........................................................................................................52
Electronic Parts Troubleshooting Guide.............................................................................54
Electronic Control Device.....................................................................................................65
Schematic Diagram ...............................................................................................................68
Exploded View & Replacement Parts List...........................................................................70
-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 Defrost Mode (for Heating Model)
• Intermittent operation of fan at low speed.
• 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 28°C.
reached at 28°C.
Sleep Mode Auto Control
Natural Air Control by CHAOS Logic
Airflow Direction Control
-3-
Defrost(Deice) control (Heating)
Hot-start Control (Heating)
-4-
• If power is on, it will operate to chage capacitor (330µF/450WV) on controller and power relay will oper-
ate after about 2~5sec.
• If outdoor temp. is below 0°C, sump heater is operating for 20min.
• 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 12Hz.
• If DC link voltage is not over DC 350V in 6 sec. in case of PFC on, it does not operating of compressor.
• If DC link voltage is not over DC 350V in 6 sec. in case of PFC on, it does not operating of compressor.
• 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.
• 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 low, it will change high speed in case of below AC193V, over 45°C of out-
door temp., and over fc, fh of comp. Freq.
door temp., and over fc, fh of comp. Freq.
• Low speed
- Nomal mode and over AC270V
Outdoor Unit
Power relay control
Stand by control at low temp.
Active power filter control(PFC)
Comp. Freq. control
Overheatng. Protection(Powr module)
Freq. speed control(up/down speed)
V/F control
Total current control (over current protechton)
DC peak current control
4 way valve control
Outdoor fan motor control
Discharge pipe temp. control