LG Electronics 230/208V manuale d’uso

LG Room Air Conditioner SERVICE MANUAL LG CAUTION website http://www.lgservice.com • BEFORE SERVICING THE UNIT, READ THE SAFETY PRECAUTIONS IN THIS MANUAL. • ONLY FOR AUTHORIZED SERVICE PERSONNEL.[...]

—2— 1. PREF A CE 1.1 SPECIFICATIONS ..........................................3 1.2 FEATURES AND BENEFITS ..........................4 1.3 CONTROL LOCATIONS .................................6 1.4 ADDITIONAL CONTROLS ..............................7 2. DISASSEMBL Y INSTR UCTIONS 2.1 MECHANICAL PARTS ....................................9 2.1.1 FRON[...]

—3— 1.1 SPECIFICA TIONS 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 Di[...]

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 c[...]

• Outdoor Air Temperature Switchover The unit is designed to control the electric heater interfacing with the outdoor temperature. When the outdoor temperature fall s to 20˚F below, it makes the compressor be off and the electric heater be turned on until the outdoor temperature is above 25˚F. This will effectively change the Unit from heat pum[...]

—6— 1.3 CONTR OL LOCA TIONS • OPERA TION ELECTRIC HEA TING MODEL COOLING ONL Y MODEL VENT CLOSE VENT OPEN TEMPERATURE CONTROL Set the Thermostat control to the desired temperature mark 5 (the mid-point is a good starting position). If the room temperature is not satisfactory after a reasonable time, adjust the control to a cooler or warmer se[...]

1.4 ADDITIONAL CONTR OLS • REMO VING THE FR ONT GRILLE Additional controls are available after removing the front grille and option cover of control box. To remove the front grille, pull out the bottom of front grille and then lift up. To replace the front grille, place the tabs over the top of the unit and push the bottom of front grille until t[...]

• REMO TE/LOCAL CONTROL When remote/local switch #1 is on, it allow the unit to operate by the control of Remote Wall Thermostat. The unit control by knobs are not available. • ENERGY SA VER The energy saver switch #2 is on. This switch is set at continuous fan to provide continuous fan operation in cool or heat modes. When the switch is off th[...]

—9— 2.1 MECHANICAL P AR TS 2.1.1 FRONT GRILLE 1. Remove the front grille. (See Fig. 1) 2. To remove the front grille, pull out the bottom of the front grille and then lift up. Re-install the component by referring to the removal procedure. 3. To replace the front grille, place the tabs over the top of the unit and push the bottom of front grill[...]

—10— 2.1.2 CONTROL BO X (Half-Disassembl y) 1. Remove the front grille. (Refer to section 2.1.1) 2. Remove the three screw which fasten the control box. (See Fig. 2) 3. Pull the control box from the barrier. (See Fig.2) 4. Discharge the capacitor by placing a 20,000 ohm resistor across the capacitor terminals. 5. Disconnect three wire housings [...]

Figure 7 —11— 2.2 AIR HANDLING P AR TS 2.2.1 HEA TER ASSEMBL Y AND CROSS FLO W F AN 1. Remove the front grille. (Refer to section 2.1.1) 2. Remove the control box assembly. (Refer to section 2.1.3) 3. Remove the 3 screws which fasten the net steel. (See Fig. 4) 4. Remove the 3 screws which fasten the electric heater assembly. (Electric heater m[...]

—12— 2.2.3 SHROUD 1. Remove the fan. (Refer to section 2.2.2) 2. Remove the screw which fastens the shroud. 3. Remove the shroud. (See Fig. 8) 4. Re-install the component by referring to the removal procedure, above. 2.3 ELECTRICAL P AR TS 2.3.1 OUTDOOR MO T OR 1. Remove the clamp cord and disconnect a wire housing in control box. (Refer to sec[...]

—13— 2.3.5 PO WER CORD 1. Remove the control box. (Refer to section 2.1.2) 2. Disconnect the grounding screw from the control box. 3. Disconnect 2 receptacles. 4. Remove a screw which fastens the clip cord. 5. Separate the power cord from the control box. (See Fig. 12) 6. Re-install the component by referring to the removal procedure, above. (U[...]

—14— 2.4 REFRIGERA TION CYCLE 2.4.1 CONDENSER 1. Remove the brace and the shroud. (Refer to section 2.2.2) 2. Remove the 4 screws which fasten the shroud. (Refer to section 2.2.2) 3. Push forward the shroud and remove the 2 screws which fasten the condenser with the basepan. 4. After discharging the refrigerant completely, unbraze the interconn[...]

—15— — Replacement of the refrigeration cycle. 1. When replacing the refrigeration cycle, be sure to discharge the refrigerant system using a Freon TM recovery System. If there is no valve to attach the recovery system, install one (such as a WATCO A-1) before venting the Freon TM . Leave the valve in place after servicing the system. 2. Afte[...]

—16— Equipment needed: Vacuum pump, Charging cylinder, Manifold gauge, Brazing equipment. Pinch-off tool capable of making a vapor-proof seal, Leak detector, Tubing cutter, Hand Tools to remove components, Service valve. A COMPOUND GAUGE EVAPORATOR (LOW PRESSURE SIDE) COMPRESSOR CAPILLARY TUBE CONDENSER (HIGH PRESSURE SIDE) SEE INSETS BELOW MAN[...]

—17— 3. INST ALLA TION 3.1 HO W T O INST ALL THE UNIT For existing sleeve, you should measure the wall sleeve dimensions. You can install the new air conditioner according to these installation instructions to achieve the best performence. All wall sleeves used to mount the new air conditioner must be in good structural condition and have the r[...]

—18— 3.2.1 PREP ARA TION OF SLEEVE ASSEMBLE THE WALL SLEEVE • Raise the sleeve side panels to upright position as shown on the right. • Place sleeve upper on top of side panels. • Fasten the four screws as shown on the right. • Assemble drain kit. • Fasten this assembly to the each side of the wall sleeve as shown on the right. • As[...]

—19— 3.2.3 UNIT INST ALLA TION 1. Remove the shipping screw from the ventilation door. (See Fig. 17) 2. Remove the front gille by pulling it out at the bottom to release it, then lift it up along the unit top front. (See Fig. 18) 3. Slide the unit into the wall sleeve and secure with 6 screws through the unit flange holes. (See Fig. 19) 4. Rein[...]

—20— P erpendicular 20 A T andem 15 A Large T andem 30 A 230/208 v olt receptacle configuration CAUTION 1. Do not use an extension cord with this unit. 2. When the unit is in the OFF position, the power supply to the electrical controls. 3. Disconnect the power to the unit before servicing the unit. 4. Remove the power cord from the wall recept[...]

4. PERFORMANCE D A T A —21— V oltage (V) Cooling Data Cooling Capacity (Btu/h) Cooling Amps (A) Cooling Power (W) EER (Btuh/Watt) Moisture Removal (Pts/h) Airflow Indoor CFM (W et) @0.3ESP (Hi) Indoor CFM (W et) @0.3ESP (Lo) Indoor CFM (Dry) @0.3ESP (Hi) Indoor CFM (Dry) @0.3ESP (Lo) 208 230 11,500 4.8 1025 11.0 LP120CEM 208 230 11,800 5.2 1055[...]

—22— Model LP120CEM T emperature Outdoor Air Return Air T otal Wattage Dry Bulb Wet Bulb Input Min M a x Rating W attage 1045 1090 85 1050 1180 80 1055 1180 75 1060 1180 100 70 1055 1180 65 1050 1180 60 1045 1175 55 1030 1160 85 1000 1125 80 1005 1130 75 1005 1135 95 70 1005 1130 65 1000 1125 60 990 1120 55 980 1105 85 950 1070 80 950 1075 75 9[...]

—23— Model LP090HM* LP120HEM T emperature Outdoor Air Return Air T otal Wattage T otal Wattage Dry Bulb Wet Bulb Input Input M i n Max M i n Max Rating W attage 810 850 1120 1145 85 830 935 1120 1230 80 835 940 1125 1235 75 835 940 1130 1240 100 70 835 940 1125 1240 65 830 935 1120 1230 60 820 925 1115 1230 55 810 915 1100 1210 85 785 890 1070 [...]

—24— Cooling change of temperature - Air Conditioners Room Air Room Air LP120CEM Dr y Wet T emperature Across Bulb Bulb Indoor Coil ( ∆ T) M in Max Rating Btu/h 11700 12000 Rating CFM 3 0 0 3 3 0 85 1 5 80 9 13 90 75 18 22 70 26 30 80 5 10 75 13 18 85 70 21 25 65 29 33 75 9 13 70 15 20 80 65 23 26 60 29 33 70 10 15 65 15 20 75 60 21 25 55 26 [...]

—25— Cooling Ampere Chart - Air Conditioners Cond Inlet Air Te mperature Rating Ampere 100 95 90 85 80 LP120CEM Model Amperage M i n Max 4.8 5.2 5.6 5.6 5.4 5.3 5.2 5.1 4.9 4.8 4.7 4.6 Model Room Air Room Air LP090HEM LP120HEM Dry W et T emperature Across T emperature Across Bulb Bulb Indoor Coil ( ∆ T) Indoor Coil ( ∆ T) M i n Max M i n Ma[...]

—26— 5. TR OUBLESHOO TING GUIDE 5.1 OUTSIDE DIMENSIONS 1,066mm(42") 505mm(20") 406mm(16") 406mm(16") 5.2 PIPING SYSTEM Following is a brief description of the important components and their functions in the refrigeration system. Refer to Fig. 21 to follow the refrigeration cycle and the flow of the refrigerant in the cooling[...]

—27— 5.3 TR OUBLESHOO TING GUIDE In general, possible trouble is classified in two causes. The one is called Starting Failure which is caused from an electrical defect, and the other is Ineffective Air Conditioning caused by a defect in the refrigeration circuit and improper application. Unit is running but cooling is ineffective Ineffective Co[...]

—28— Fails to Start Check of circuit break er and fuse. Gas leakage of f eeler bulb of thermostat Check of control s witch. Only f an f ails to star t. Improper wiring. Def ect of f an motor capacitor . Irregular motor resistance ( ). Irregular motor insulation ( ). Replacement of f an motor Regular but f ails to star t Replacement of compresso[...]

—29— —29— COMPLAINT CAUSE REMEDY Check voltage at outlet. Correct if none. Check voltage to rotary switch. If none, check power supply cord. Replace cord if circuit is open. Check switch continuity. Refer to wiring diagram for terminal identification. Replace switch if defective. Connect wire. Refer to wiring diagram for terminal identifica[...]

—30— NAME PLATE RATING MINIMUM MAXIMUM 208/230V 187V 253V COMPLAINT CAUSE REMEDY Check voltage. See the limits on the preceding. page. If not within limits, call an electrician. Check the wire connections, if loose, repair or replace the terminal. If wires are off, refer to wiring diagram for identification, and replace. Check wire locations. I[...]

—31— COMPLAINT CAUSE REMEDY Check the voltage. See the limits on the preced- ing page. If not within limits, call an electrician. Check overload, if externally mounted. Replace if open. (If the compressor temperature is high, remove the overload, cool, and retest.) If not running, determine the cause. Replace if required. Remove the cabinet. in[...]

—32— 6. SCHEMA TIC DIA GRAM HEA TER ASSY HEA TER FOR E/HEA TER MODEL INDOOR PIPE THERMISTOR INDOOR AIR THERMISTOR FDC REMOTE THERMOST A T EXTERNAL TRANS CF CAP ACIT OR CAP ACIT OR P/NO:3854A20196A BK RD TB-1 TB-2 TB-3 TB-4 POWER INPUT WH WH RD RD BK BK WH WH(BL) (Ribbed) BK(BR) (Plain) GN(GN/YL) BL VR1 WARM COOL BL LOW FA N CN-ODFH CN-ODF CN-IC[...]

—33— 7. EXPLODED VIEW C D F E A B 552111 35211A 346810 152302 359011 753000 W50400 152302 135312 149410 237200 237204 238310 W0CZZ-1 W0CZZ-2 264110 263230-1 W50400 W6640 249951 268714 237200 354210 349600-1 546811 559011 W48602 149980 130411 554160 554030 135515 349600 552114 552102 552113 135500 567502 135510 147900 550140 148000 552206 263230[...]

—34— 8. REPLA CEMENT P AR TS LIST PART NO. DESCRIPTION REMARK LOCATION NO . LP090HEM LP120CEM LP120HEM A 249951 CONTROL BOX,ASM(INDOOR) 4995A20466U 4995A20463W 4995A20463U 264110 POWER CORD ASM 6411A20048M 268714 PCB ASM(MAIN) 6871A10082J 6871A10082C 149410 KNOB ASM 4941A30015B 237200 PANEL ASM,CONTROL 3720A20169A 237204 PANEL,SIDE 3720A20186A [...]

P/No.: 3828A20308H May, 2006 Printed in Korea[...]