Table of Contents
Troubleshooting
Related Manuals for LG LB-E4880HL
Summary of Contents for LG LB-E4880HL
- Page 1 Internal Use Only http://biz.lgservice.com Ceiling Duct Air Conditioner SVC MANUAL(Exploded View) MODEL : LB-E4880HL CAUTION Before Servicing the unit, read the safety precautions in General SVC manual. Only for authorized service personnel.
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Page 2: Table Of Contents
Installation of Indoor, Outdoor Unit Test Running 3-way Valve Cycle Troubleshooting Guide Electronic Parts Troubleshooting Guide Electronic Control Device Schematic Diagram Exploded View - 2 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 3: Functions
Hot start after defrost ends. Hot-start Control (Heating) The indoor fan stops until the evaporator piping temperature will be reached at 28°C. - 3 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 4: Remote Controller
When the air conditioner is turned off by a power failure, it is restarted automatically after a power resupply. - 4 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 5: Product Specifications (Cooling & Heating)
Main Power Cable Time Delay Safety Function Soft Dry 3 (Hi, Med, Low) Fan Speed (Indoor) 24Hrs Timer Self-Diagnosis - 5 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 6: Dimensions
Dimensions MODEL:LB-E4880HL Indoor Unit 1230 Outdoor Unit 1220 - 6 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 7: Refrigeration Cycle Diagram
When installed at a distance of 15m, 525g of refrigerant should be added. (15-7.5) x 70g = 525g - 7 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 8: Wiring Diagram
52F1 RELAY FOR FMo FUSE (250V,10A) 20SV REVERSING COIL DEICER PCB TERMINAL BLOCK COMPRESSOR CRANKCASE HEATER P/NO : 3854A90021S - 8 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 9: Operation Details
More than More than 3 minutes 3 minutes Selecting Selecting Selecting INDOOR FAN fan speed fan speed fan speed COMPRESSOR - 9 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 10 The operation diagram is as following. PIPING 1min TEMPERATURE 28°C 26°C INDOOR FAN COMPRESSOR : Selected Fan : Low Fan : Fan Stop - 10 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 11: Defrost Control
• During the normal operation 'CHECK' won't be displayed in the remote controller. Remote controller LCD Accident Point Indoor temperature thermistor error Indoor piping thermistor error Indoor unit & remote controller - 11 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 12: Installation Of Indoor, Outdoor Unit
• Ensure the spaces indicated by arrows from the wall, ceiling, fence or other obstacles. s t a More than c l e 30cm More than 70cm - 12 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 13 4. Avoid places where sulfurous acid gas or corrosive gas is generated. 5. Avoid places near high frequency generators. - 13 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 14 • A place where the unit can withstand its vibration. • A place where service can be easily performed. M10 washer (Local M10 SP. washer supply) M10 Nut - 14 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 15: The Indoor Unit Installation
- W3/8 or M10 CAUTION Suspension bolt - W3/8 or M10 Tighten the nut and bolt to prevent unit falling - 15 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 16: Remote Controller Installation
The maximum length of the cord is 100m. If the length of the cord exceeds 50m, use a wire size greater than 0.5mm - 16 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 17: Connecting Cables Between Indoor Unit And Outdoor Unit
4) In Australia, the length of power supply cord measured from the entry of the power supply cord to the middle of live pin on the power plug should be over 1.8m. - 17 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 18: Electrical Wiring
Please check !! Cover control - 18 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 19: Connecting Pipes To The Indoor Unit
= Improper flaring = section and do flaring work again. Inclined Surface Cracked Uneven damaged thickness Even length all round - 19 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 20: Piping Connection
Use two wrenches and tighten with regular torque. Union Pipe size Torque 3/8" 4.2kg.m Liquid Side 1/2" 5.5kg.m 5/8" 6.6kg.m Gas Side 3/4" 6.6kg.m - 20 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 21 Make sure to be closed. Drainage hole • Upward routing not allowed CORRECT INCORRECT - 21 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 22: Refrigerant Pipe
Connecting cable • Insulate and tape both the gas piping and liquid piping. Tape Liquid pipe Gas pipe Thermal insulator - 22 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 23: Test Running
M4...118N . cm{12kgf . cm} M5...196N . cm{20kgf . cm} M6...245N . cm{25kgf . cm} M8...588N . cm{60kgf . cm} - 23 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 24: Hand Over
HAND OVER Teach the customer the operation and maintenance procedures, using the operation manual (air filter cleaning, temperature control, etc.). - 24 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 25: 3-Way Valve
– Open the low-pressure valve on the charge set slightly to air purge from the charge hose. (5) Set the liquid side valve to the closed position. - 25 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 26 – Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 3 to 5 kg/cm - 26 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 27 – Discharge the refrigerant gradually; if it is discharged too suddenly, the refrigeration oil will also be discharged. - 27 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 28 (4) Disconnect the charge hose from the vacuum pump. – Vacuum pump oil. If the vacuum pump oil becomes dir ty or depleted, replenish as needed. - 28 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 29: Gas Charging
1 minute and then repeat the procedure (pumping down-pin). - 29 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 30: Cycle Troubleshooting Guide
2. The temperature can be measured by attaching the thermometer to the low pressure tubing and wrap it with putty. - 30 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 31: Electronic Parts Troubleshooting Guide
Exchange IC02D of IC02D DC5V? Check the Is the PIN 31,32 of 5V P.C.B pattern. MICOM. DC5V? Exchange MICOM - 31 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 32 Is the pin 31, 32 of Check the wired Remocon Micom DC 5V PCB and DC 12V pattern. Change the wired Remocon. - 32 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 33 Is IC01M operated Change IC01M. normally? Is 4way-valve operated? Check RY-4Way Check the connector (CN-OUT, CN-AC1.2) - 33 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
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Page 34: Electronic Control Device
Electronic control device • MAIN P.C.B ASM - 34 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 35: Schematic Diagram
Schematic Diagram - 35 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... -
Page 36: Exploded View
Exploded View and Replacement Parts List (1) Indoor Unit • MODEL: LB-E4880HL - 36 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes... - Page 37 • MODEL: LB-E4880HL.NW8LAP - 37 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 38 (2) Outdoor Unit MODEL: LB-E4880HL - 38 - Copyright ©2009 LG Electronics. Inc. All right reserved. LGE Internal Use Only Only for training and service purposes...
- Page 39 JANUARY, 2009 P/NO : 3828A30014R...