LG Room Air Conditioner - Hawco

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Troubleshooting Guide Trouble 4 70 Room Air Conditioner When indoor Fan does not operate. Turn off main power. Check the connection of CN-MOTOR. Check the Fan Motor. Check the Fuse(AC250V, T2A). Check the related circuit of indoor Fan Motor. • The pin No.45 of micom and the part for driving SSR. • Check the related pattern. • Check the SSR. - SSR Open: Indoor Fan Motor never operate. - SSR short: Indoor Fan Motor always operates in case of ON or OFF. Turn on the main power Check the SSR high speed operation by remote control. (the Indoor Fan Motor is connected) The voltage of Pin No 1(orange) and 3(black) of CN-MOTOR. About AC 180V over About AC 50V over SSR is not damaged Check SSR
Trouble 5 When the horizontal 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 • Check the connecting condition of CN-U/D Connector • Check the soldering condition(on PCB) of CN-U/D Connector Check the operating circuit of the vertical louver • Confirm that there is DC +12V between pin ➀ of CN-U/D and GND. • Confirm that there is a soldering short at following terminals. - Between 41 , 42 , 43 and 44 of MICOM - Between 4 , 5 , 6 and 7 of IC01M - Between 10 , 11 , 12 and 13 of IC01M If there are no problems after above checks. • Confirm the assembly condition that are catching and interfering parts in the link of the vertical louver Troubleshooting Guide Service Manual 71
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LG Room Air Conditioner SERVICE MAN
Page 3 and 4:
2002 LG Model Name 1 2 - 3 4 5 6 7
Page 5 and 6:
Safety Precautions Safety Precautio
Page 7 and 8:
Do not place a heater or other appl
Page 9 and 10:
Dimensions Symbols Used in this Man
Page 11 and 12:
Product Specifications Table-1 Item
Page 13 and 14:
Piping Length and Elevation Capacit
Page 15 and 16:
Check 1. Compare the flared work wi
Page 17 and 18:
For left rear piping 1. Route the i
Page 19 and 20: Good case CAUTION: Installation Inf
Page 21 and 22: Connecting the Cables Indoor Instal
Page 23 and 24: Checking the Drainage To check the
Page 25 and 26: Air Purging Air purging Installatio
Page 27 and 28: Test Running 1. Check that all tubi
Page 29 and 30: Functions Indoor Unit Operation ON/
Page 31 and 32: Remote Control Operation ON/OFF Ope
Page 33 and 34: Protection of the evaporator pipe f
Page 35 and 36: Healthy Dehumidification mode opera
Page 37 and 38: Fuzzy mode operation(Optional)s Ope
Page 39 and 40: Jet cool mode operation Operation
Page 41 and 42: Auto restarting operation Operation
Page 43 and 44: Portection from overheating of powe
Page 45 and 46: Auto Cleaning Operation • Functio
Page 47 and 48: 2. To remove the Control Box. • R
Page 49 and 50: Schematic Diagram Electric Control
Page 52: Schematic Diagram INDOOR MAIN P.W.B
Page 55 and 56: Troubleshooting Guide Refrigeration
Page 57 and 58: 2-way, 3-way Valve 1. 2. 3. 4. 5. 6
Page 59 and 60: Pumping Down • Procedure Indoor u
Page 61 and 62: Balance Refrigerant of the 3-way Va
Page 63 and 64: Gas Charging (After Evacuation) •
Page 65 and 66: Self-diagnosis function 1. The malf
Page 67 and 68: Electronic Parts ❇ Refer to elect
Page 69: Trouble 3 The Compressor/Outdoor Fa
Page 73 and 74: Trouble 7 The Outdoor Unit does not
Page 75 and 76: Trouble 8-2 When compressor does no
Page 77 and 78: ■ The problem of missing the conn
Page 79 and 80: Outdoor Unit 435301 559010 447910 5
Page 81 and 82: Replacement Parts List LOCATION No.
Page 83 and 84: Outdoor Unit Replacement Parts List
Page 85 and 86: Replacement Parts List LOCATION No.
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LG Room Air Conditioner - Hawco

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