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LG S4-S5-SE Chassis Service Manual
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LG S4-S5-SE Chassis Service Manual

LG S4-S5-SE Chassis Service Manual

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MODELS: S4-S5-SE Chassis

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Summary of Contents for LG S4-S5-SE Chassis

  • Page 1 MODELS: S4-S5-SE Chassis...
  • Page 3 IN DOOR Lights up during indoor unit operation. (Optional)
  • Page 4 (Optional)

  • Page 5: Cooling Only Models

    (1) Cooling Only Models INDOOR UNIT OUTDOOR UNIT (2-a) Cooling & Heating Models 12K-18K-24K INDOOR UNIT OUTDOOR UNIT (2-b) Cooling & Heating Models 9K INDOOR UNIT OUTDOOR UNIT...
  • Page 6 09K-12K 18K-24K...
  • Page 7 IN DOOR Indicator • While in appliance operation, ON while in indoor unit running, OFF while in indoor unit off. (Optional) (Optional) IN DOOR Indicator • While in appliance operation, ON while in indoor unit running, OFF while in indoor unit off. (Optional) (Optional)

  • Page 8: Defrost Control

    • While in compressor off, the indoor fan repeats low air flow speed and pause. • While the intake air temp is between compressor on temp, and compressor off temp., 10-min dehumidification operation and 4-min compressor off repeat. Compressor ON Temp Setting Temp+0.5°C Compressor OFF Temp Setting Temp-0.5°C...
  • Page 9 Fuzzy Operation (H/P Model) • When any of operation mode is not selected like the moment of the power on or when 3 hrs has passed since the operation off, the operation mode is selected. • When determining the operation mode, the compressor, the outdoor fan, and the 4 way valve are off and only the indoor fan is operated for 15 seconds.They an operation mode is selected according to the intake air temp at that moment as follows.

  • Page 10: Sleep Timer Operation

    • When the Fuzzy key (Temperature Control key) is input after the initial setting temperature is selected, the Fuzzy key value and the intake air temperature at that time are compared to select the setting temperature automatically according to the Fuzzy rule. •...
  • Page 11 -11-...
  • Page 12 -12-...

  • Page 13: Display Function

    Display Function 1. Heating Mode 2. Cooling Mode Operation Indicator Operation Indicator • Cooling, Soft Dry, Fan, Heating • Cooling, Soft Dry, Fan Sleep Timer Indicator Sleep Timer Indicator • Sleep Mode • Sleep Mode IN DOOR Indicator IN DOOR Indicator DOOR DOOR Timer Indicator...
  • Page 14 More than More than 10cm More than More than 2.3m -14-...
  • Page 15 Installation plate ø ø 70mm 70mm Left rear piping Right rear piping Distance (mm) CHASSIS (Grade) 9k, 12k 18k, 24k -15-...

  • Page 16: Selecting The Location(Outdoor Unit)

    3) Select a well-drained place. 1. If you can't meet above guide line in the seaside installation, please contact LG Electronics for the additional anticorrosion treatment. 2. Periodic ( more than once/year ) cleaning of the dust or salt particles stuck on the heat exchanger by using water...
  • Page 17 -17-...
  • Page 18 Tape Connecting pipe Drain hose Drain hose Connecting cable Connecting cable Drain hose Drain hose -18-...
  • Page 19 Piping for passage through piping hole Tubing holder -19-...
  • Page 20 Indoor unit installation • Remove the spacer. • Bad case • Ensure that the hooks are properly seated on the installa- • Following bending type from right to left could cause tion plate by moving it left and right. problem of pipe damage. Connecting cable Drain hose...

  • Page 21: Outdoor Unit

    Outdoor unit Gas side piping (Bigger diameter) Liquid side piping (Smaller diameter) Torque wrench -21-...
  • Page 22 -22-...
  • Page 23 Grade Circuit Breaker 9k~12k -23-...
  • Page 24 Pull the right and the left side -24-...
  • Page 25 Pull the right and the left side -25-...
  • Page 26 Intake temperature Discharge air Discharge temperature -26-...
  • Page 27 -27-...
  • Page 28 Earth Conductor -28-...
  • Page 29 Screw -29-...
  • Page 30 Motor cover Bearing Cross-flow fan -30-...
  • Page 31 -31-...

  • Page 32: Pumping Down

    Pumping Down Liquid side Indoor unit Outdoor unit Open 2-Way valve Gas side Closed 3-Way valve CLOSE CLOSE Purge the air ï Procedure (6) Operate the air conditioner at the cooling (1) Confirm that both the 2-way and 3-way valves cycle and stop it when the gauge indicates are set to the open position.
  • Page 33 Balance Refrigerant of the 3-way Valve (Gas leakage) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open OPEN CLOSE ï Procedure (1) Confirm that both the 2-way and 3-way valves (3) Open the valve (Lo side) on the charge set and are set to the back seat.
  • Page 34 Evacuation (All amount of refrigerant leaked) Liquid side Indoor unit Outdoor unit 3-Way valve Open Gas side 3-Way valve Open Vacuum pump OPEN CLOSE ï Procedure (1) Connect the vacuum pump to the center hose (3) Close the valve (Lo side) on the charge set, of charge set center hose turn off the vacuum pump, and confirm that the gauge needle does not move (approxima-...

  • Page 35: Gas Charging

    Gas Charging (After Evacuation) Liquid side Indoor unit Outdoor unit Open 3-Way valve Gas side Open 3-Way valve Check valve Charging cylinder OPEN CLOSE ï Procedure (1) Connect the charge hose to the charging This is different from previous procedures. cylinder.
  • Page 36 Additional gas charging (Gas leakage) ï When refrigerant is insufficient by leakage, recharge the unit with the refrigerant up to normal operating suc- tion pressure. ï Use the graph or the equation below to get operating suction pressure according to indoor and outdoor tem- perature.
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  • Page 44 P/No.:5400575301...

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