Assessments - 3, GPA: 3.3
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• ONLY FOR AUTHORIZED SERVICE PERSONNEL. CONTENTS 1. PREFACE 1.1 SPECIFICATIONS ..........................................3 1.2 FEATURES AND BENEFITS..........................4 1.3 CONTROL LOCATIONS.................................6 1.4 ADDITIONAL CONTROLS..............................7 2. DISASSEMBLY INSTRUCTIONS 2.1 MECHANICAL PARTS....................................9 2.1.1 FRONT GRILLE.....................................9 2.1.2 CONTROL BOX (Half-Disassembly)....10 2.1.3 CONTROL BOX (Full-Disassembly) ....10 2.2 AIR HANDLING PARTS................................11 2.2.1 HEATER ASSEMBLY AND CROSS FLOW FAN...........................................11 2.2.2 FAN......................................................11 2.2.3 SHROUD..............................................12 2.3 ELECTRICAL PARTS ...................................12 2.3.1 OUTDOOR MOTOR ............................12 2.3.2 INDOOR MOTOR ................................12 2.3.3 COMPRESSOR ...................................12 2.3.4 CAPACITOR ........................................12 2.3.5 POWER CORD....................................13 2.3.6 P.C.B....................................................13 2.4 REFRIGERATION CYCLE............................14 2.4.1 CONDENSER ......................................14 2.4.2 EVAPORATOR ....................................14 2.4.3 CAPILLARY TUBE...............................14 3. INSTALLATION 3.1 HOW TO INSTALL THE UNIT ......................17 3.2 SUGGESTED TOOL REQUIREMENTS.......18 3.2.1 PREPARATION OF SLEEVE ..............18 3.2.2 PREPARATION OF THE FRONT GRILLE ................................................18 3.2.3 UNIT INSTALLATION ..........................19 3.3 ELECTRICAL REQUIREMENTS ..................20 3.3.1 ELECTRICAL DATA (FOR 230V/208 MODEL)........20 3.3.2 ELECTRICAL SAFETY ............................20 4. FERFORMANCE DATA.................................21 5. TROUBLESHOOTING GUIDE 5.1 OUTSIDE DIMENSIONS...............................26 5.2 PIPING SYSTEM ..........................................26 5.3 TROUBLESHOOTING GUIDE......................27 6. SCHEMATIC DIAGRAM.....................32 7. EXPLODED VIEW..................................33 8. REPLACEMENT PARTS LIST .......34 1. PREFACE This SERVICE MANUAL provides various service information, including the mechanical and electrical parts etc. This room air conditioner was manufactured and assembled under a strict quality control system. The refrigerant is charged at the factory. Be sure to read the safety precautions prior to servicing the unit. 1.1 SAFETY PRECAUTIONS 1. When servicing the unit, set the ROTARY SWITCH or POWER SWITCH to OFF(O) and unplug the power cord. 2. Observe the original lead dress. If a short circuit is found, replace all parts which have been overheated or damaged by the short circuit. 3. After servicing the unit, make an insulation resistance test to protect the customer from being exposed to shock hazards. 1.2 INSULATION RESISTANCE TEST 1. Unplug the power cord and connect a jumper between 2 pins (black and white). 2. The grounding conductor (green or green & yellow) is to be open. 3. Measure the resistance value with an ohm meter between the jumpered lead and each exposed metallic part on the equipment at all the positions (except OFF or O) of the ROTARY SWITCH. 4. The value should be over 2M.. —2— 1.1 SPECIFICATIONS Cooling / Electric Heater Model Name Cooling(Btu/h) Cooling Watts(W) EER Electric Heat (Btu/h) Electric Heat Amps(A) Min Circuit Protection (Amps) LP120CEM 11800/11500 1055/1025 11.2/11.2 --20 Cooling / Heat Pump / Electric Model Name Cooling(Btu/h) Cooling Watts(W) EER Electric Cycle Heat (Btu/h) COP Electric Heat (Btu/h) Electric Heat Amps(A) Min Circuit Protection (Amps) LP090HEM 9300/9000 800/775 11.6/11.6 8200/8000 3.4/3.4 11900/9900 3.2/3.5 20 LP120HEM 12100/11800 1090/1065 11.1/11.1 10900/10700 3.3/3.3 11900/9900 4.4/4.8 20 LP 12 0 C M 2 12 34 5 6 7 8 Digits 1,2 - LG Packaged Terminal Air Conditioner Digit 6 - Product Type Digits 3,4 - Unit Cooling Capacity C = Air Conditoner 07 = 7,000 Btu/h H = Heat Pump 09 = 9,000 Btu/h Digit 7- Control Type 12 = 12,000 Btu/h M = Mechanical Control 15 = 15,000 Btu/h Digit 8 - Electric Heating Capacity Digit 5 - Serial No. 2 = 2.0 kW 3 = 3.5 kW 5 = 5.0 kW —3— 1.2 features Unit Features The PTAC has many features, some of which are different than those found on conventional PTAC units. The servicer must be familiar with these features in order to properly service the unit. • Highly featured Micom controls using IIR (infinite impulse response) IIR function can make Micom controls maximize and keep the comfort conditions to sense the small changes in temperature per second. • Compressor Restart delay This feature extends the overall life of compressor by preventing the short-cycling of the air-conditioner. When the compressor restarts, LG PTAC is designed to give a minimum of three minutes to have a time of equalizing the refrigerant pressures for o...