Mini-split single zone systems, mini split standard systems, flex multi split dual and tri-zone indoor units–cooling only, outdoor units–cooling only, indoor units–heat pump, outdoor units–heat pump (2 pages)
Lg multi-inverter type air conditioner svc manual(general) (113 pages)
Summary of Contents for LG A3UH363FA0, A3UC363FA0, AMNH093D4A0, AMNC093D4A0, AMNH123DEA0, AMNC123DEA0, AMNH093APM0, AMNC093APM0, AMNH123APM0, AMNC123APM0
Multi Type Air Conditioner SERVICE MANUAL MODEL Room Type • Indoor Unit: AMNH093D4A0(LMN090HE) AMNC093D4A0(LMN090CE) AMNH123DEA0(LMN120HE) AMNC123DEA0(LMN120CE) • Outdoor Unit: A3UH363FA0(LMU360HE) A3UC363FA0(LMU360CE) website http://www.lgservice.com Art Cool Type AMNH093APM0(LMAN090HNS) AMNC093APM0(LMAN090CNS) AMNH123APM0(LMAN120HNS) AMNC123APM0(LMAN120CNS) CAUTION • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
Multi type Air Conditioner Service Manual TABLE OF CONTENTS Model Number Nomenclature ...3 Symbols Used in this Manual ...4 Safety Precautions...5 Dimensions...11 Indoor Unit...11 Outdoor Unit ...12 Product Specifications ...13 Installation ...15 Installation Parts...15 Installation Tools...15 Select the best location ...16 Piping length and elevation ...17...
Model Number Nomenclature Indoor Unit Outdoor Unit Serial Number Function A : Basic, L : Nano Plasma + Auto Clean(Wall Mounted) C: Plasma(Ceiling Cassette), G: Low Static Motor ART COOL(DELUXE) Type Front Panel Color B : Blue, D : Wood, M : Metal, R : Mirror, W : White Chassis Name Indoor Unit Type Wall mounted split...
This symbol alerts you to the risk of electric shock. This symbol alerts you to hazards that could cause harm to the air conditioner. This symbol indicates special notes. NOTICE 4 Multi type Air Conditioner Cooling Capacity (Btu/h) Input Current (Btu/h.w)
Safety Precautions To prevent injury to the user or other people and property damage, the following instructions must be followed. Incorrect operation due to ignoring instruction will cause harm or damage. The seriousness is classified by the following indications. WARNING This symbol indicates the possibility of death or serious injury.
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Authorized Service Center. • There is risk of fire, electric shock, explosion, or injury. Do not let the air conditioner run for a long time when the humidity is very high and a door or a window is left open.
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Do not plug or unplug the power supply plug during operation. • There is risk of fire or electric shock. Do not allow water to run into electric parts. • It may cause There is risk of fire, failure of the product, or electric shock.
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Always check for gas (refrigerant) leak- age after installation or repair of product. • Low refrigerant levels may cause failure of product. 8 Multi type Air Conditioner When the product is soaked (flooded or submerged), contact an Authorized Service Center.
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• Avoid personal injury. Do not use the product for special purposes, such as preserving foods, works of art, etc. It is a consumer air conditioner, not a precision refrigeration system. • There is risk of damage or loss of property.
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Clean the filter every two weeks or more often if neces- sary. • A dirty filter reduces the efficiency of the air conditioner and could cause product malfunction or dam- age. Use a firm stool or ladder when cleaning or maintaining the product.
Dimensions Indoor Unit 1. Split Type Indoor Installation plate Model Dimension 2. Art Cool Type Indoor Unit Split Type 9 kBtu/h 12 kBtu/h Pipe Hole Hanger Hole Fix Hole ARTCOOL Type 9 kBtu/h 12 kBtu/h Service Manual 11...
Product Specifications Indoor Unit Indoor Unit Type Model Nominal Cooling Capacity Nominal Heating Capacity Air Circulation H/M/L Setting temperature range(cool/heat) Fan motor Output Model Input Running Current Type No. Used / Diameter Noise Level (Sound Press,1m) H/M/L Temperature controller Coil Tube Size (OD) Fins per inch No.
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-Interconnecting Piping Length 7.5m -Level Difference of Zero. 2. Capacities are Net Capacities. : See the page "Combination Table" 4. Due to our policy of innovation some specifications may be changed without notification. 14 Multi type Air Conditioner A3UC363FA0(LMU360CE) 9,000~36,000 Btu/hr 2637~10,550...
Installation Installation Read carefully, and then follow step by step. Installation Parts Installation plate Type "A" screw and plastic anchor Type "B" screw Remote Control Holder Installation Tools Figure Name Figure Name Screw driver Ohmmeter Electric Drill Hexagonal wrench Measuring Tape, Knife Ammeter Hole Core Drill Gas Leak Detector...
3. Do not place animals and plants in the path of the warm air. 4. Take the air conditioner weight into account and select a place where noise and vibration are mini- mum.
Piping length and elevation Multi Piping Type Max total length of Capacity(Btu/h) all pipes (A+B/A+B+C) 45m(150ft) Indoor Capacity (Btu/h) 3/8" 3/8" CAUTION: Capacity is based on standard length and maximum allowance length is on the basis of reliability. Oil trap should be installed every 5~7 meters (16.4~23.0ft). Max length of each Min length of each pipe (A/B/C)
Drilling the hole through the wall for piping connections must be done safely. Distance (mm) CHASSIS (Grade) 18 Multi type Air Conditioner Chassis Hook Ø70mm Left rear piping Installation Plate Type "A"...
Preparing work for Installation (Artcool Type Only) Open panel front 1. First, push the front panel backward and lift it up to remove the two screws. 2. The moment of lifting the both lower parts of panel front, you can hear sound this panel came out, In this time panel front is separated 3.
Horizontality T I O 20 Multi type Air Conditioner 7. Drill the piercing part for connecting pipe as diameter 50mm. (In case of piercing rear surface) Refer to No. 5 on this page when making a hole in the wall.
Flaring Work and Connection of Piping Flaring work Main cause for gas leakage is due to defect in flaring work. Carry out correct flaring work in the following procedure. Cut the pipes and the cable. 1. Use the piping kit accessory or the pipes purchased locally. 2.
If the drain hose is routed inside the room, insulate the hose with an insulation material* so that dripping from "sweat- ing"(condensation) will not damage furniture or floors. *Foamed polyethylene or equivalent is recommended. 22 Multi type Air Conditioner Smooth all round Inside is shiny without scratches = Improper flaring =...
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4. Indoor unit installation Hook the indoor unit onto the upper portion of the installa- tion plate.(Engage the two hooks of the rear top of the indoor unit with the upper edge of the installation plate.) Ensure that the hooks are properly seated on the installa- tion plate by moving it left and right.
2. Tighten the flare nut with a wrench. Outside diameter inch Ø6.35 Ø9.52 3. When extending the drain hose at the indoor unit, install the drain pipe. 24 Multi type Air Conditioner Torque kg . m Wrench Indoor unit tubing Connecting Indoor unit...
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Wrap the insulation material around the connecting por- tion. 1. Overlap the connection pipe heat insulation and the indoor unit pipe heat insulation material. Bind them together with vinyl tape so that there may be no gap. 2. Wrap the area which accommodates the rear piping hous- ing section with vinyl tape.
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2. Assemble connecting lead wire with controller and first fix the upper part of panel front, then match the lower part of panel front 3. Drive two screws. 26 Multi type Air Conditioner Panel Front Connector...
Flaring Work and Connection of Piping Installation Information. For left piping. Follow the instruction below. Good case • Press on the upper side of clamp and unfold the tubing to downward slowly. Bad case • Following bending type from right to left may cause damage to the tubing. Service Manual 27...
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• Do not use rechargeable batteries, such batteries differ from standard dry cells in shape, dimensions, and per- formance. • Romove the batteries from the remote controller if the air conditioner is not going to be used for some long time.
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Outdoor Align the center of the pipings and sufficiently tighten the flare nut by hand. Finally, tighten the flare nut with torque wrench until the wrench clicks. • When tightening the flare nut with torque wrench, ensure the direction for tightening follows the arrow on the wrench. Outside diameter inch Ø6.35...
(ETL recognized and CSA certified). RECOMMAND: When using the separate wire as the power cord, please fix the separate wire into the control box panel by using tie wrap as the fixture. 30 Multi type Air Conditioner Main power source Conditioner...
Connect the cable to the Outdoor unit. 1. Remove the cover control from the unit by loosening the Connecting cable(Low voltage) screw. Connect the wires to the terminals on the control board individually as the following. 2. Secure the cable onto the control board with the holder (clamper).
(3) Using a round terminal fastener or pliers, securely clamp each stripped wire end with a round terminal. (4) Position the round terminal wire, and replace and tighten the terminal screw using a screwdriver. 32 Multi type Air Conditioner Lock nut Power supply line Conduit panel Low voltage line (1ø, 230/208V)
CAUTION: Provide a circuit breaker between power source and the unit as shown below. Main power source Conditioner Connect the cable to the indoor unit 1. Connect the wires to the terminals on the control board individually according to the outdoor unit connection. •...
1. The drain hose should point downward for easy drain flow. 2. Do not make drain piping. Do not raise Water Water leakage leakage 34 Multi type Air Conditioner Accumulated drain water Tip of drain hose dipped in water Water Waving...
Forming the piping Form the piping by wrapping the con- necting portion of the indoor unit with insulation material and secure it with two kinds of vinyl tape. • If you want to connect an additional drain hose, the end of the drain outlet should be routed above the ground.
: Leakage test shoud be done for each indoor NOTICE unit connection set, separately. 36 Multi type Air Conditioner 1. Do a leakage test of all joints of the tubing(both indoor and outdoor) and both gas and liquid side service valves.
5. Replace the valve caps at both gas and liquid side service valves and fasten them tight. This completes air purging with a vacuum pump. The air conditioner is now ready for test running. NOTICE : Repeat evacuation procedure for each indoor unit.
If you are ever uncertain of the unit charge, reclaim, evacuate and weigh in the correct charge using the unit nameplate charge adjusting for line sets longer or shorter than 7.5m(25ft) for each indoor unit. 38 Multi type Air Conditioner Max length of...
2) Precautions in test run The initial power supply must provide at least 90% of the rated voltage. Otherwise, the air conditioner should not be operated. For test run, carry out the cooling operation firstly even during heating season. If heating operation is carried out firstly, it leads to the trouble of compres- sor.
• While compressor on, the indoor fan is off when the indoor pipe temp. is below 20°C(68°F), when above 27°C(80.6°F) , it operates with the low or setting speed. When the indoor pipe temp is between 20°C(68°F) and 40 Multi type Air Conditioner Setting Temp+0.5°C(32.9°F) Setting Temp-0.5°C(31.1°F)
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27°C(80.6°F), it operates with Super-Low(while in sleep mode, with the medium airflow speed). • While compressor off, the indoor fan is off when the indoor pipe temp is below 33°C(91.4°F), when above 35°C(95°F) , it operates with the low airflow speed. •...
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• When the set time is reached after the time is input by the remote control, the appliance stops operating. • The timer LED is on when the off-timer is input. It is off when the time set by the timer is reached. 42 Multi type Air Conditioner Setting Temp + 0.5°C(32.9°F) Setting Temp+0.5°C(32.9°F)
• If the appliance is on pause at the time set by the timer, the pause continues. Off-Timer <=> On-Timer Operation • When the set time is reached after the on/off time is input by the remote control, the on/off-timer operation is carried out according to the set time.
• 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. 44 Multi type Air Conditioner Cooling Mode Operation, 22°C(71.6°F), High Speed Dehumidification Operation, 23°C(73.4°F), High Speed...
Function of Indoor Unit Split Type Indoor Unit Operation ON/OFF by Remote controlle Sensing the Room Temperature • Room temperature sensor. (THERMISTOR) Room temperature control • Maintains the room temperature in accordance with the Setting Temp. Starting Current Control • Indoor fan is delayed for 5 seconds at the starting. Time Delay Safety Control •...
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Airflow Direction Control • The louver can be set at the desired position or swing up and down automatically. 46 Multi type Air Conditioner : Lights up during the system operation. : Lights up during Sleep Mode Auto operation. : Lights up during Timer operation.
Function of Outdoor Unit Outdoor Unit Two Comp algorithm • Inverter Comp is first priority and then Constant Comp is turning on responding to load condtion. Operating Step • Compressor step varies considering condition such as room temp,outdoor temp, operating room number,Temp gap between room temp and set temp and so on.
Auto Operation Healthy Dehumidification Operation Heating Operation • Cooling Model( ), Heat Pump Model( 48 Multi type Air Conditioner START/STOP BUTTON Operation starts when this button is pressed and stops when the button is pressed again. OPERATION MODE SELECTION BUTTON Used to select the operation mode.
Disassembly Indoor Unit Split Type Indoor Unit Disconnect the unit from power supply before mak- ing any checks. Be sure the power switch is set to “OFF”. To remove the Grille from the Chassis. • Set the up-and-down air discharge louver to open position (horizontally) by finger pressure.
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4. To remove the Evaporator. • Remove 3 screws securing the evaporator(at the left 2EA in the Eva Holder, at the right 1EA). • When repair, do not damage the Caution label. 50 Multi type Air Conditioner Screw...
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• Unhook the tab on the right inside of the chassis at the same time, slightly pull the evaporator toward you until the tab is clear of the slot. 5. To remove the Motor Cover • Remove 2 securing screw. •...
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- Pull the cover control out from the control box and disconnect other wires. - Remove securing screws. - Pull the control box out from the chassis carefully. 52 Multi type Air Conditioner Panel Front Connector Step Motor Connectors Sensor Connector...
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3) To remove the Evaporator. - Remove 4 screws securing the evaporator. - Pull the evaporator out from the chassis carefully. 4) Before removing the Turbo Fan. - Remove the securing screws from the chassis. - Pull the pipe cover, top cover and the air guide. 5) To remove the Motor.
Schematic Diagram Wiring Diagram 1. Room Type Indoor Unit -S4/SE chassis 2. Art Cool Type Indoor Unit 3. Outdoor Unit 1. A3UH363FA0(LMU360HE) 2. A3UC363FA0(LMU360CE) 58 Multi type Air Conditioner...
Components Locations 1. Indoor Unit MAIN P.C.B ASM 1) Split Type • TOP VIEW PCB :6870A90409B ASSY:6871A20771 6871A20782 • BOTTOM VIEW Service Manual 59...
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Schematic Diagram 2) Art Cool Type • TOP VIEW • BOTTOM VIEW 60 Multi type Air Conditioner...
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2. Display ASSEMBLY 1) Split Type (6871A20680) 2) Art Cool Type (6871A20462) TOP VIEW BOTTOM VIEW Service Manual 61...
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Schematic Diagram 3. Outdoor Unit 1) Component side 62 Multi type Air Conditioner...
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Schematic Diagram 2) Solder side Service Manual 63...
Self-diagnosis Function Error Indicator • The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble. • Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table. •...
1. The suction pressure is usually 4.5~6.0 kg/cm 2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. 66 Multi type Air Conditioner : approx. 0°C(32°F) All amount of refrigerant leaked out.
Electronic Parts Troubleshooting Guide Refer to electronic contorol device drawing & schematic diagram. The Product doesn’t operate at all. Trouble 1 Turn off the main power and wait until LED on outdoor PCB is off. Does "Beeping" sound is made from the indoor unit? Check the voltage of power(AC208V/AC230V, 60Hz).
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Check DISP PWB Ass'y remote controller door is fault, it is impossible to -Voltage between CN1 : DC +5V operate temperature regulating( ) and wind speed selecting. Check the Display PWB Ass'y • Check receiver ass'y 68 Multi type Air Conditioner...
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The Compressor/Outdoor Fan are don't operate Trouble 3 Operate Cooling Mode by setting the disired temperature of the remote controller is less than one of the Indoor temperature by 1°C at least. When in air circulation mode, compressor/outdoor fan is stopped. Check the sensor for Indoor temperature is attatched as close as to be effected by the themperature of Heat Exchange (EVA.) When the sensor circuit for Indoor temperature and connector are in bad connection or are...
Indoor Fan may be stopped in the Soft Dry Mode(change to the Cooling Operation Mode). Indoor Fan is to be stopped when Indoor pipe(coil) termperature is lower than 79°F. (At that times, Defrost indicator is turned on) 70 Multi type Air Conditioner Check connecting condition of the CN-MOTOR CON- NECTOR Check the interference of Indoor Fan.
When the louver does not operate. Trouble 5 When Vertical Louver does not operate. • Confirm that the Vertical Louver is normally geared with the shaft of Stepping Motor. • If the regular torque is detected when rotating the Vertical Louver with hands Normal •...
7. If the voltage of the sensor is 2.5Vdc / at 25°C, then sensor is normal. 8. If the resistance of the sensor is 0 or 5Vdc, then sensor is abnormal. 72 Multi type Air Conditioner Cause of error • Open / Short Normal resistor : 10K / at 25°C (Unplugged)
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Error Title code Communication 05 / 53 (Indoor Outdoor) Check Point 1. Check the input power AC 230V.(Outdoor, Indoor) 2. Check the communication wires are correctly connected. Adjust the connection of wire Confirm the wire of "Live", "Neutral". 3. Check the resistance between communication line and GND.(Normal : Over 2M ) 4.
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1. Check the indoor unit capacity. 2. Check the combination table. In the tropical model case single cycle has no error for over capacity. 74 Multi type Air Conditioner Cause of error Check point & Normal condition • Check the discharge pipe sensor.
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Error Title code Outdoor air sensor Condensor pipe sensor D-Pipe sensor Check Point 1. Estimate the resistance of each sensor.(Unplugged) 2. Estimate the voltage of each sensor.(Plugged) 3. If the resistance is 0V or 5Vdc, then sensor is abnormal Cause of error Check point &...
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Pumping down (Transfering) Evacuation (Servicing) Gas charging (Servicing) Pressure check (Servicing) Gas releasing (Servicing) 76 Multi type Air Conditioner 2-way Valve (Liguid Side) Hexagonal wrench (4mm) Flare nut Open position Closed position To outdoor unit Shaft position Closed (with valve cap)
Hi- handle (CLOSE) 6. Operate the air conditioner at the cooling cycle and stop it when the gauge indicates 1kg/cm 7. Immediately set the gas side valve to the closed position. - Do this quickly so that the gauge ends up indicat- ing 1kg/ 8.
5. Close the Low handle of the gauge turn off the vacuum pump, and confirm that the gauge needle does not move(approximately 5 minutes after turning off the vacuum pump). 78 Multi type Air Conditioner Liquid side Open 2-Way valve...
(approximately 150g each time) while operating the air conditioner in the cooling cycle; however, one time is not suffi- cient, wait approximately 1 minute and then repeat the procedure(pumping down-pin).