LG Room Air Conditioner - Hawco

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Troubleshooting Guide Re-air Purging (Re-installation) • Procedure Gas cylinder R22 Indoor unit OPEN (1) Confirm that both the liquid side valve and the gas side valve are set to the closed position. (2) Connect the charge set and a gas cylinder to the service port of the Gas side valve. – Leave the valve on the gas cylinder closed. (3) Air purging. – Open the valves on the gas cylinder and the charge set. Purge the air by loosening the flare nut on the liquid side valve approximately 45° for 3 seconds then closing it for 1 minute; repeat 3 times. – After purging the air, use a torque wrench to tighten the flare nut on liquid side valve. (4) Check for gas leakage. – Check the flare connections for gas leakage. (5) Discharge the refrigerant. – Close the valve on the gas cylinder and discharge the refrigerant until the gauge indicates 3 to 5 kg/cm 2 g. 60 Room Air Conditioner Lo Liquid side Gas side CLOSE 3-Way valve 3-Way valve Closed Closed Outdoor unit (6) Disconnect the charge set and the gas cylinder, and set the Liquid side and Gas side valves to the open position. – Be sure to use a hexagonal wrench to operate the valve stems. (7) Mount the valve stem nuts and the service port nut. – Use torque wrench to tighten the service port nut to a torque of 1.8 kg.m. – Be sure to check for gas leakage. CAUTION: Do not leak the gas in the air during Air Purging.
Balance Refrigerant of the 3-way Valve (Gas leakage) • Procedure Indoor unit OPEN (1) Confirm that both the 2-way and 3-way valves are set to the back seat. (2) Connect the charge set to the 3-way valve’s port. – Leave the valve on the charge set closed. – Connect the charge hose to the service port. Lo Liquid side Gas side CLOSE 3-Way valve 3-Way valve Open Open Troubleshooting Guide Outdoor unit (3) Open the valve (Lo side) on the charge set and discharge the refrigerant until the gauge indicates 0 kg/cm 2 G. – If there is no air in the refrigerant cycle (the pressure when the air conditioner is not running is higher than 1 kg/cm 2 G), discharge the refrigerant until the gauge indicates 0.5 to 1 kg/cm 2 G. if this is the case, it will not be necessary to apply a evacuatin. – Discharge the refrigerant gradually; if it is discharged too suddenly, the refrigeration oil will also be discharged. Service Manual 61
Page 1 and 2:
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: Pumping Down • Procedure Indoor u
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 and 70: Trouble 3 The Compressor/Outdoor Fa
Page 71 and 72: Trouble 5 When the horizontal louve
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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