LG LM-1830H2L Svc Manual

Multi air conditioner

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Service manual (67 pages)

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Multi Air Conditioner

SVC MANUAL(Exploded View)

MODEL : LM-1830C2L/M/N

LM-1830H2L/M/N

LM-2430C2L/M/N

LM-2430H2L/M

L2-C243AL1

CAUTION

Before Servicing the unit, read the safety precautions in General SVC manual.

Only for authorized service personnel.

Internal Use Only

http://biz.lgservice.com

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Troubleshooting

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Page 1 Internal Use Only http://biz.lgservice.com Multi Air Conditioner SVC MANUAL(Exploded View) MODEL : LM-1830C2L/M/N LM-1830H2L/M/N LM-2430C2L/M/N LM-2430H2L/M L2-C243AL1 CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
Page 2: Table Of Contents
Cycle Troubleshooting Guide ....................43 Electronic Parts Troubleshooting Guide.................. 45 Electronic Control Device ......................52 Schematic Diagram........................55 Exploded View..........................57 - 2 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 3: Functions
• The louver can be set at the desired position or swing up and down automatically. • Intermittent operation of fan at low speed. - 3 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 4 ˚C To ˚F Swtiching Button ˚C / ˚F Fan Operation Mode : Fan Operates without cooling or heating. Reset - 4 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 5: Product Specifications
9.52(3/8") Refrigerant(R-22) – at 7.5m Airflow Direction Control(Up & Down) Remote Controller Type L.C.D Wireless Sleeping Operation Drain Hose - 5 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 6 9.52(3/8") Refrigerant(R-22) – at 7.5m Airflow Direction Control(Up & Down) Remote Controller Type L.C.D Wireless Sleeping Operation Drain Hose - 6 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 7 12.7(1/2") Refrigerant(R-22) – at 7.5m Airflow Direction Control(Up & Down) Remote Controller Type L.C.D Wireless Sleeping Operation Drain Hose - 7 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 8 12.7(1/2) Refrigerant(R-22) – at 7.5m Airflow Direction Control(Up & Down) Remote Controller Type L.C.D Wireless Sleeping Operation Drain Hose - 8 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 9: Dimensions
( LM-2430C2L/M, LM-2430H2L/M ) MODEL LM-1830C2L/M, LM-1830H2L/M LM-2430C2L/M, LM-2430H2L/M Hanger Hole Pipe Hole Fix Hole Capacity SP1 Ch. 9K/12K - 9 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 10 2. Outdoor Unit Gas side 3-Way valve Liquid side 2-Way valve MODEL LM-1830C2L/M, LM-1830H2L/M, LM-2430C2L/M, LM-2430H2L/M,L2-C243AL1 76.5 - 10 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 11: Refrigeration Cycle Diagram
CAPILLARY TUBE 2-WAY VALVE HEAT HEAT EXCHANGER EXCHANGER (EVAPORATOR) (CONDENSER) A-UNIT B-UNIT COMPRESSOR GAS SIDE 3-WAY VALVE COMPRESSOR 2. LM-1830H2L/M, LM-2430H2L/M (Cooling & Heating modes) Indoor Unit Outdoor Unit COOLING HEATING COMPRESSOR-A DEICE 4-WAY VALVE 3-WAY COMPRESSOR-B HEAT VALVE EXCHANGER...
Page 12: Wiring Diagram
Wiring Diagram 1. INDOOR UNIT: LM-1830C2L/M, LM-1830H2L/M, LM-2430C2L/M, LM-2430H2L/M FORCED OPERATION AUTO RESTART REMOTE CONTROL MOTOR THERMISTOR STEP MOTOR MAIN PCB ASSY CN-DISP1 DISPLAY PCB ASSY PILLAR TERMINAL INDOOR WIRING DIAGRAM TO OUTDOOR UNIT 3854A20075M 2. OUTDOOR UNIT • LM-1830C2L/M •...
Page 13: Operation Details
➲ Intake Air Temp-1°C 18°C ≤ Intake Intake Air Temp<24°C ➲ Intake Air Temp-0.5°C ➲ 18°C Intake Air Temp<18°C - 13 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 14 • Outdoor fan is OFF if pipe temperature is over 6.5°C and outdoor fan is ON if pipe temperature is below 0°C. • Outdoor fan is off if any one part is heating overload condition. - 14 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 15 • While in Fuzzy operation, the airflow speed of the indoor fan is automatically selected according to the tem- perature. - 15 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 16 • The timer LED is on when the on-timer is input. It is off when the time set by the timer is reached. • If the appliance is operating at the time set by the timer, the operation continues. - 16 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 17 • 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. - 17 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 18 • 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. - 18 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 19 "beep-beep-beep-beep-beep-" is made 10 times to indicate that the remote control signal cannot be received. - 19 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 20: Display Function
• Poor communication line/circuit check 3sec • Check indoor fan • Indoor fan lock motor and outdoor PCB ass'y - 20 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 21: Installation
3. Piping length and the elevation Indoor unit Pipe Size Max. Max. piping Elevation length LIQUID B (m) A (m) 1/2"(3/8") 1/4" Outdoor unit - 21 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 22 80mm door side. 50mm ø70mm ø70mm LM-2430C2L/M, LM-2430H2L/M Left rear piping Right rear piping ø70mm ø70mm Wall Indoor Outdoor - 22 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 23 Since the flare part comes into contact with the connec- tors, carefully check the flare finish. - 23 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 24 Locating at the upper side can be a reason that drain water overflows drain pan inside the unit. Gas side piping Connecting Liquid side piping cable Drain hose - 24 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 26 Press the lower left and right side of the unit against the Installation Plate until the hooks engages with their slots (sound click). - 26 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 27 1.8kg . m Liquid Side (1/4") 4.2kg . m Gas Side (3/8") 5.5kg . m Gas Side (1/2") Torque wrench - 27 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 28 • Every wire must be connected firmly. • No wire should be allowed to touch refrigerant tubing, the compressor or any moving parts. - 28 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 29 (4) Position the round terminal wire, and replace and tighten the terminal screw using a screwdriver. Connecting cable - 29 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 30 • Press the Grille toward the chassis until it will be back into place. - 30 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 31 Tip of drain hose Less than dipped in water 50mm gap Water Water Water Waving leakage Ditch leakage leakage - 31 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 32 7. Tighten the valve stem nuts of the 2-way valve and 3-way valve. Liquid side Indoor unit Outdoor unit Closed 2-way valve Gas side 3-way valve Closed Vacuum pump OPEN CLOSE - 32 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 33 ** A, B mean indoor unit higher located than outdoor unit. C, D mean outdoor unit higher located than indoor unit. - 33 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 34 2. Ensure the difference between the intake temperature and the discharge one is more than 8°C. Discharge air - 34 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 35: Operation
CHAOS SWING BUTTON Used to stop or start louver movement and set the desired up/down airflow direction. - 35 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 36 Used to check the room temperature. ˚C TO ˚F SWITCHING BUTTON RESET BUTTON Used prior to resetting time or after replacing batteries. - 36 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 37: Disassembly Of The Parts (Indoor Unit)
1. To remove the sensor, housing connect, step motor conductor with sensor holder, Motor, Evaporator & P.C.B. Motor Conductor Sensor Conductor Step Motor Conductor - 37 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 38 • Remove the left end of the cross-flow fan from the self-aligning bearing. - 38 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 39: 2-Way, 3-Way Valve
Pressure check Open Open Open (Servicing) (with charging cylinder) Gas releasing Open Open Open (Servicing) (with charging cylinder) - 39 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 40 - Open the Low-handle valve on the gauge slightly to air purge from the hose. 5. Set the liquid side valve to the closed position. - 40 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 42 6. Apply steps from 1 to 5 to each unit (A-unit, B- repeat the procedure(pumping down-pin). unit) by the same method. - 42 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 43: Cycle Troubleshooting Guide
Insufficient amount of Current is low. Lower Higher refrigerant(Leakage) Clogging Current is low. - 43 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 44 If overload Max. capacity, display error code in indoor unit. Max. capacity Outdoor Max capacity 14k combination 19kcombination 23k combination 33k combination - 44 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 45: Electronic Parts Troubleshooting Guide
• Voltage of Micom No. 2, • IC01A(KIA7036, Reset IC) (DC +4.5V over) and Soldering condition. • Replace faulty parts X01(8MHz) - 45 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 46 ) - R17(2Ω) - IR LED - Q1 - • Check the connecting circuit between PIN R16(2.2KΩ). R01L(1K) - C01L(680PF) - MICOM PIN • Check Receiver Ass'y - 46 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 47 Check if connection line (Indoor/Outdoor) is complied with Wiring Diagram. Good connection Bad connection Check Outdoor Unit Correct connection line (PCB Ass'y) - 47 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 48 Check POLY S/W in indoor PCB Ass'y If it is opened If it is shorted Exchange Indoor PCB Ass'y Check the outdoor PCB Ass'y - 48 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 49 • Confirm the assembly conditions that are catching and interfering parts in the rotation radial of the Vertical Louver - 49 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 50 Check if connection line (Indoor/Outdoor) is complied with Wiring Diagram. Good connection Bad connection Check Outdoor Unit Correct connection line (PCB Ass'y) - 50 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 51 LED on display and indoor fan, outdoor fan, COMP are not operated. • The unit can be reoperated by On/Off control of Remocon. - 51 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 52: Electronic Control Device
Electronic Control Device 1. Indoor • MAIN P.C.B ASM - 52 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 57: Exploded View
Exploded View and Replacement Parts List 1. Indoor Unit (LM-1830C2M, LM-1830H2L/M) - 57 - Copyright ©2008 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
Page 63 September, 2008 P/NO : 3828A20097A...

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