Owner`s Manual (General)
Contents
1. Screw Type Sill bracket Sash track Screw Type B 5 Pull each Frame curtain fully to each window sash track and pull the bottom window sash down behind the Top retainer bar until it meets 6 Attach each Frame curtain the window sash by using screws Type C See Fig 10 7 Slide the unit into the cabinet See Fig 11 CAUTION For security purpose rein A stall screws Type A at cabinet s sides 8 Cut the Foam strip to the proper length and insert between the upper window sash and the lower window sash See Fig 12 9 Attach the Window locking bracket with a screw Type C See Fig 13 10 Attach the front grille to the cabinet by inserting the tabs on the grille into the tabs on the front of the cabi net Push the grille in until it snaps into place See Fig 34 11 Lift the inlet grille and secure it with a screw Type A through the front grille See Fig 14 12 Window installation of room air conditioner is now completed Installation Power Cord Screw SR Al Screw Type A Figure 11 Figure 12 Window locking bracket Figure 13 8 Service Manual 12 Figure 15 Installation Operation VENTILATION ventilation lever must be the CLOSE position order to maintain the best cooling conditions When fresh air is necessary in the room set the ven tilation le2. LOCATION PART NO NO AS LWHD1800HR LWHD2400HR kila 130410 BASE ASSEMBLY SINGLE 3041A30002Y 3041A10010K R 130910 CABINET ASSEMBLY SINGLE 3091AR6057X 3091AR6056A R 135314 GRILLE ASSEMBLY INLET 3530AR1604A 3530AR1604A R 135312 GRILLE ASSEMBLY FRONT SINGLE 3531A20073W 3531A20073W R 135510 COVER ASSEMBLY CONTROL 3551A30015A 3551A30015A R 137215 PANEL CONTROL 3720AR6163A 3720AR6163A R 146812 MOTOR ASSEMBLY SYNC 2H01102A 2H01102A R 147581 1 LOUVER HORIZONTAL 4758AR7264C 4758AR7264C R 147581 2 LOUVER HORIZONTAL 4758AR7278C 4758AR7278C R 147582 LOUVER VERTICAL 4758AR6157A 4758AR6157A R 148000 BRACE 4800AR7271A 4800AR7271A R 149980 SHROUD 4998AR1597A 4998A10027A R 159830 FILTER MECH A C 5231AR6159A 5231AR6159A R 238310 ESCUTCHEON 3831A10018M 3831A10018M R 249950 CONTROL BOX ASSEMBLY SINGLE 4995A20186C 4995A20186A R 264110 POWER CORD ASSEMBLY 6411A20051G 6411A20051G R 567480 THERMISTOR ASSEMBLY 6323A20003F 6323A20003F R 268711 1 PWB PCB ASSEMBLY DISPLAY 6871A20195V 6871A20195V R 268711 2 PWB PCB ASSEMBLY MAIN AC 6871A10188C 6871A10188C R 267110 REMOTE CONTROLLER 6711A20034D 6711A20034D R 346811 MOTOR ASSEMBLY AC 4681 AR6033K 4681A20011L R 349001 DAMPER VENTILATION 4900AR7265A 4900AR7265A R 349600 MOUNT MOTOR 4960AR1596A 4960AR2895B R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059A 5211A20162A R 352113 TUBE ASSEMBLY DISCHARGE SINGLE 5211A30066A 5211A20805V R 35211A TUBE
3. S 7 Figure 26 Service Manual 16 Disassembly 10 CAPACITOR 11 POWER CORD Remove the control box Refer to section 3 Unfold the control box Refer to section 10 Disconnect the grounding screw from the control box Disconnect 2 receptacles Remove a screw which fastens the clip cord Pull the power cord See Fig 28 Re install the component by referring to the removal NO oO 12 THERMISTOR 1 2 3 4 5 Remove the control box Refer to section 3 Remove the screw and knobs which fasten the display Disconnect the 2 leads from the rocker switch and Remove a screw and unfold the control box Remove the screw and the clamp which fastens the Disconnect all the leads of capacitor terminals Re install the components by referring to the removal panel remove the panel See Fig 27 capacitor See Fig 27 cedure above 2 Figure 27 procedure above Use only one ground marked hole for ground connec tion Figure 28 If the supply cord of this appliance is damaged it must be replaced by the special cord The special cord means the cord which has the same specification marked on the supply cord fitted to the unit Remove the control box Refer to section 3 Unfold the control box Refer to section 10 Disconnect the thermistor terminals from main P W B assembly Remove the thermistor Re install the components b
4. If condenser fins are closed over a large area on the coil surface head pressures will increase causing the compressor to overload Straighten the fins or replace the coil Compressor cycles on overload Capacitor Test capacitor Wiring Check the terminals If loose repair or replace Refrigerating system Check the system for a restriction Insufficient cooling or heat ing Air filter If restricted clean of replace Exhaust damper door Close if open Unit undersized Determine if the unit is properly sized for the area to be cooled Excessive noise Blower or fan Check the set screw or clamp If loose or missing correct If the blower or fan is hitting air guide rearrange the air handling parts Copper tubing Remove the cabinet carefully and rearrange tubing not to contact cabinet compressor shroud and barrier Auto air swing fails Rotary switch Set the knob to HIGH COOL or LOW COOL while rocker switch is ON Wiring Check terminals If loose repair or replace Synchronous motor Check the synchronous motor for open circuit 27 Room Air Conditioner Exploded View Exploded View y y NN D 27 ON PS S Service Manual 28 Replacement Parts List Replacement Parts List
5. Left frame curtain Frame guide 2 _ gt Window locking E bracket lt gt Sil bracket 2 curtain Type A 14 Type B 7 Type C 5 Type D 2 Carriage Bolt 2 Lock Nut 4 TY f Y 1 9 Hoom Air Conditioner J Right frame Installation Suggested too SCREWDRIVER RULER KNIFE HAMMER PENCIL LEVEL PREPARATION OF CHASSIS Shipping screws 1 Remove the screws which fasten the cabinet at both sides and at the back Keep these two screws which fasten the cabinet at both sides for later use 2 Slide the unit out from the cabinet by gripping the base pan handle and pulling forward while bracing the cabinet 3 Cut the window sash seal to the proper length Peel off the backing and attach the Foam PE to the underside of the window sash 4 Remove the backing from Foam PE with 3 holes and attach it to the bottom of the Top retainer bar 5 Attach the Top retainer bar onto the top of the cabinet with 3 screws Type A 6 Insert the Frame guides into the bottom of the cabinet Foam PE Figure 3 7 Insert the Frame Curtain into the Top retainer bar and Frame guides Top retainer bar 8 Fasten the curtains to the unit with 10 screws Type A at both sides Frame guide Figure 4 Service Manual 10 Installation Cabinet Inst 1 Open the window Mark a line on the center o
6. website http www lgservice co LG LG Room Air Conditioner SERVICE MANUAL MODEL LWHD1800HR LWHD2400HR NIT READ THE SAFETY UAL Air Conditioner Service Manual TABLE OF CONTENTS Safety u u 3 Dimensions P 5 Product Specifications U 6 irc E 8 How to Installthe jo eR RE 8 How to use the Reversible Inlet grille 8 Window 5 25205 ra redit a De RID 9 Installation Kits Contents some models including installation 10 Suggested tool Requirements n nrnna 10 Gabinet Installation ee a ie daisies p ispa 11 u 13 Disassembly 5 rr 14 C e 14 Air Handling Parts tide t atu etat tentent 15 El citioal Dalle ies d aaa 16 Refrigeration Cy Cle cs 19 Schematic Diagrami uuu Eten
7. tst utc ente actu un nca a om tUa 22 Troubleshooting 23 Piping he aa 23 Troubleshooting e 24 Room Air Conditioner Voltage Limits etd bra ite 26 Exploded VieW died a 28 Replacement Parts 29 2 Room Air Conditioner Safety Precautions Safety Precautions To prevent injury to the user or other people and property damage the following instructions must be followed E Incorrect operation due to ignoring instruction will cause harm or damage The seriousness is Classified by the following indications AWARNING This symbol indicates the possibility of death or serious injury ACAUTION This symbol indicates the possibility of injury or damage to property only E Meanings of symbols used in this manual are as shown below 9 Be sure not to do Be sure to follow the instruction AWARNING Installation Do not use damaged power cord plugs or a Always use the power plug and socket with loose socket the ground terminal There is risk of fire or electric shock There is risk of electric shock Service Manual 3 Safety Precautions Do not modify or extend the power cord Do not install remove or re in
8. CAPILLARY TUBE lt Figure 32 23 Room Air Conditioner Troubleshooting Guide In general possible trouble is classified in two kinds 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 Ineffective Cooling Check cold air circulation Check outdoor coil for smooth flow heat exchanger amp the fan operation Dirty indoor coil Check gas leakage Heat exchanger Not on separate circuit Malfunction of fan Repair gas leak Clogged of air filter Obstruction at air outlet Unit runs but poor cooling Check heat load increase Clean condenser Check inside gas Replacement of unit if the pressure unit is beyond repair Adjusting of refrigerant charged Correct above trouble Malfunction of compressor Check clogging in refrigera Replacement of tion circuit compressor Satisfactory operation with Repair clogging in refrigera temperature difference of tion circuit inlet amp outlet air 44 50 F 7 10 C Service Manual 24 Troubleshooting Guide Fails to Start Check circuit breaker and fuse Check of power source Check of control switch setting Gas leakage of feeler bulb of thermostat Check of control switch Fan only fails to start Improper wiring Compr
9. GN THERMISTOR MAIN P W B ASSY DISPLAY P W B ASSY oL ese T18VIT2A CN SIGNAL SUB P W B ASSY BK RD FUSE LINK HEATER OO AWWWW O BK RD BI METAL THERMOSTAT WIRING DIAGRAM 3854A20268W Service Manual 22 Troubleshooting Guide Troubleshooting Guide CONDENSER COIL EAM CAPILLARY TUBE MOTOR COMPRESSOR BLOWER EVAPORATOR COIL Figure 32 is a brief description of the important components and their function in what is called the refrigeration system This will help you to understand the refrigeration cycle and the flow of the refrigerant in the cooling cycle ROOM AIR CONITIONER CYCLE OF REFRIGERATION EVAPORATOR COILS CONDENSER COILS VAPOR INLET COMPLETE LIQUID Geol TOW PRESSURE VAPOR HOT BOIL OFF POINT DISCHARGED COOLED AIR AIR ROOM AIR HEAT LOAD mm A A 1 Bru OUTSIDE COOLING g AIR FOR REFRIGERANT MOTOR PASS THROUGH COMPRESSOR 8 LIQUID PRESSURE DROP LIQUID OUTLET EZZ HIGH PRESSURE VAPOR NN Lau REFRIGERANT RRS Low PRESSURE VAPOR LIQUID REFRIGERANT
10. left side and the top side 5 Move the evaporator sideward carefully and then unbraze the interconnecting tube at the evaporator connectors 6 Remove the evaporator 7 Re install the components by referring to notes See Fig 32 18 CAPILLARY TUBE S 1 Remove the cabinet Refer to section 2 a 2 Remove the brace Refer to section 4 3 3 After discharging the refrigerant completely unbraze D the interconnecting tube at the capillary tube 4 Remove the capillary tube 5 Re install the components by referring to notes 19 Room Air Conditioner JZ ER Figure 32 NOTICE Replacement of the refrigeration cycle 1 When replacing the refrigeration cycle be sure to discharge the refrigerant system using a Freon recovery System If there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the Freon Leave the valve in place after servicing the system After discharging the unit completely remove the desired component and unbrace the pinch off tubes Solder service valves into the pinch off tube ports leaving the valves open Solder the pinch off tubes with Service valves Evacuate as follows 1 Connect the vacuum pump as illustrated Fig 35A 2 Start the vacuum pump slowly open manifold valves A and B with two full turns counterclock wis
11. secures the fan Remove the fan See Fig 23 Re install the components by referring to the removal procedure above 7 Shroud 1 2 3 4 Remove the fan Refer to section 6 Remove the 2 screws which fasten the shroud Remove the shroud See Fig 24 Re install the component by referring to the removal procedure above ca 8 Motor 1 2 3 4 5 Remove the cabinet Refer to section 2 Remove the cover control and disconnect a wire hous ing in control box Refer to section 3 Remove the blower Refer to section 5 Remove the fan Refer to section 6 Remove the 4 screws which fasten the motor See Fig 25 Remove the motor Re install the components by referring to the removal procedure above 9 Compressor 1 2 Remove the cabinet Refer to section 2 Discharge the refrigerant system using FreonTM Recovery System If there is no valve to attach the recovery system install one such as a watco a 1 before venting the Freon Leave the valve in place after servicing the system Disconnect the 3 leads from the compressor After purging the unit completely unbraze the suction and discharge tubes at the compressor connections Remove the 3 nuts and the 3 washers which fasten the compressor See Fig 26 Remove the compressor Re instill the components by referring to the removal procedure above Figure 23 0
12. ASSEMBLY SUCTION SINGLE 5211A20204C 5211A20159D R 749750 AIR GUIDE ASSEMBLY 5239A20001N 5239A20001N R 354210 EVAPORATOR ASSEMBLY FIRST 5421A20059F 5421A20052B R 359012 FAN ASSEMBLY BLOWER 5834AR1599B 5834AR1599B R 550140 ISOLATOR COMP 4H00982C 4022U LO05A R 552102 TUBE CAPILLARY 5210A30040N 5210A30040N R 554031 CONDENSER ASSEMBLY FIRST 5403A20004E 5403A20112D R 554160 COMPRESSOR 2520UMGK2AA 2520UHFK2CA R 559011 FAN ASSEMBLY AXIAL 5900AR1508A 5900AR1508A R 753000 HEATER ELECTRIC 5300A20003A 5300A20003A R 753010 HEATER ASSEMBLY ELECTRIC 5301A30001B 5301A30001B R woczz CAPACITOR DRAWING 6120AR2194D 6120AR2194P R W48602 CLAMP SPRING 3 02932 3 02932 325115 1 TUBE EVAPORATOR 5210A21083A 5210A22224N R 325115 2 TUBE EVAPORATOR 5210A21090A 5210A22224N R 29 Room Air Conditioner Replacement Parts List Replacement Parts List NO 13040 ASSEMBLY SINGLE 3041A23004F 3041A23004H 130910 CABINET ASSEMBLY SINGLE 3091AR60560 3091AR60560 135314 GRILLE ASSEMBLY INLET 3530AR1604A 3530 81644 R 135312 GRILLE ASSEMBLY FRONT SINGLE 3531A20073W 3531A2007W R 135510 COVER ASSEMBLY CONTROL 3551A30015A 3551A30015A R 137215 PANEL CONTROL 7 3720AR6163A 3720AR6163A R 146812 MOTOR ASSEMBLY SYNC 2H01102 2H01102 R 147581 1 LOUVER HORIZONTAL 4758AR7264C 4758A
13. IRE WITH GROUNDING ATTACHMENT PLUG CORD CONNECTED DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT Ibs kg 123 56 143 65 OUTSIDE DIMENSION inch 26 X 16 27 32 X 26 9 16 26 X 16 27 32 X 30 5 16 W x Hx D mm 660 X 428 X 675 660 X 428 X 770 DB Dry Bulb WB Wet Bulb NOTE Please refer to Label Quality on the produst since this specification may be changed for improving performance 7 Hoom Air Conditioner Installation INSTALLATION How to Install 1 1 To avoid vibration and noise make sure the unit is installed securely and firmly 2 Install the unit where the sunlight does not shine directly on the unit If the unit receives direct sunlight build an awning to shade the cabinet 3 There should be no obstacle like a fence within 20 which might restrict heat radiation from the condenser 4 To prevent reducing performance install the unit so that louvers of the cabinet are not blocked 5 Install the unit a little obliquely outward not to leak the FOAM condensed water into the room about 1 2 or 1 4 bubble with level FENCE COOLED 6 Install the unit with its bottom portion 30 60 above the 2 floor level 7 Stuff the foam between the top of the unit and the wall to g 1 2 prevent air and insects from getting into the room Over 20 8 The power cord must be connected to an independent cir cuit The green wire must be g
14. PPLY 1 208 230V 60Hz 1 208 230V 60Hz COOLING CAPACITY Btu h 17 500 18 000 23 00 23 500 INPUT W 1 800 1 850 2 700 2 760 RUNNING CURRENT A 9 0 8 3 13 2 12 2 E E R BTU W h 9 7 8 5 HEATING CAPACITY Btu h 9 800 12 00 9 400 11 600 INPUT W 3 100 3 670 3 750 3 770 RUNNING CURRENT A 15 0 16 0 15 0 16 0 COOLING INDOOR C 26 7 DB 19 4 WB OPERATING OUTDOOR C 35 DB 23 9 WB CONDITION HEATING INDOOR C 21 1 DB 15 6 DB OUTDOOR C 8 3 DB 6 1 DB REFRIGERANT R 22 CHARGE 710 25 0 oz 880 31 0 02 EVAPORATOR 3ROW 18STACKS 4ROW 18STACKS CONDENSER 2ROW 18STACKS L BENDING TYPE 3ROW 19STACKS FAN INDOOR BLOWER FAN OUTDOOR PROPELLER TYPE FAN WITH SLINGER RING FAN SPEEDS FAN COOLING HEATING 1 2 2 1 2 2 FAN MOTOR 6 POLES OPERATION CONTROL TOUCH PANEL ROOM TEMP CONTROL THERMISTOR MEG BECTON CONTROL VERTICAL LOUVER RIGHT amp LEFT HORIZONTAL LOUVER UP amp DOWN CONSTRUCTION SLIDE IN OUT CHASSIS ELECTRIC HEATER 3 5KW 230V COMPRESSOR INTERNAL OVERLOAD PROTECTOR PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR ELECTRIC HEATER FUSE LINK BIMETAL THERMOSTAT 1 6m 3 WIRE WITH GROUNDING ATTACHMENT PLUG CORD CONNECTED DRAIN SYSTEM DRAIN PIPE OR SPLASHED BY FAN SLINGER NET WEIGHT Ibs kg 123 56 143 65 OUTSIDE DIMENSION inch 26 X 16 27 32 X 26 9 16 26 X 16 27 32 X 30 5 16 W x Hx D mm 660 X 428 X 675 660 X 428 X 770 DB Dry Bulb WB Wet Bulb NOTE Please refer to Label Qu
15. R ASSEMBLY FIRST 5421 20059 5421A20248E R 359012 ASSEMBLY BLOWER 5834AR1599B 5834AR15998 550140 ISOLATOR 4009002 4022 400 4 R 552102 CAPILLARY 5421AP3074X 52114214446 R 554031 CONDENSER ASSEMBLY 5403A20062F 5403420232068 R 554160 COMPRESSOR 2520 08 002 5416420058 R 559011 ASSEMBLY AXIAL 5900AR1508B 5900ARISOBB R 753000 HEATER ELECTRIC 5300A20003A 53004200 4 753010 HEATER ASSEMBLY ELECTRIC 5301A30001B 153014300018 77 CAPACITOR DRAWING 6120AR2194F OCZZA20001X 1486027 SPRING 2 3H02920 R 325115 1 EVAPORATOR 5211A20433C 5210A22224W 325115 2 EVAPORATOR 52114204330 5210A22224U R 135500 COVER 3550AR6173A 3550AR6173A r 31 131273 120200 PART ASSEMBLY SINGLE 3127 10015 3127A10015M 149740 IDE 2H00858D 2H00858D 135515 COVER ASSEMBLY TOP INDOOR 3551A30001A 3551A30001A 30 Room Air Conditioner March 2007 P No 3828 20841 Printed in China
16. RT2640 R 147581 2 LOUVER HORIZONTAL 4758AR7278C 4758AR7278C 8 147582 LOUVER VERTICAL 4758AR6157A 4758AR61578 48000 BRACE 7271 4800AR7271A 149980 SHROUD 998 5978 4998ARI597B 159830 MECH A C 5231AR6159A 5231ARG159A R 238310 ESCUTCHEON 3831M10018M 3831A10018M R 249950 CONTROLBOXA SSEMBLY SINGLE 4995A20186F 499542018668 R 264110 PONERCORD ASSEMBLY 64114200560 64114200560 R 567480 ASSEMBLY 63234200035 63234200035 R 268711 1 PWB PCB ASSEMBLY DISPLAY 6871A20611V 16871 20611 268711 2 PWB PCB ASSEMBLY MAIN AC 51603 EBR30851603 267110 REMOTE CONTROLLER 6711A20034D 6711A20034D 346811 MOTOR ASSEMBLY 4681A20081T 4681A20130E R 349001 DAMPER VENTILATION 4900AR7265A 4900AR72058 349600 MOUNT MOTOR 4960ART596A 49604100064 35211 TUBEA SSEMBLY CONNECTOR 5211AR7059A 521148339972 R 352113 TUBE ASSEMBLY DISCHARGESINGLE 5211A25040C 5211A21520V R 35211A ASSEMBLY SUCTIONSINGLE 5211A20204G 5211A30250H 749750 AIRGUIDE ASSEMBLY 9 20001 5239A20001N 354210 EVAPORATO
17. ality on the produst since this specification may be changed for improving performance 6 Hoom Air Conditioner Specfications Product Specifications MODELS ITEMS LWHD1807HR LWHD2400HRY7 POWER SUPPLY 1 208 230V 60Hz 1 208 230V 60Hz COOLING CAPACITY Btu h 17 500 18 000 23 00 23 500 INPUT W 1 800 1 850 2 700 2 760 RUNNING CURRENT A 9 0 8 3 13 2 12 2 E E R BTU W h 9 7 8 5 HEATING CAPACITY Btu h 9 800 12 00 9 400 11 600 INPUT W 3 100 3 670 3 750 3 770 RUNNING CURRENT A 15 0 16 0 15 0 16 0 COOLING INDOOR C 26 7 DB 19 4 WB OPERATING OUTDOOR C 35 DB 23 9 WB CONDITION HEATING INDOOR C 21 1 DB 15 6 DB OUTDOOR C 8 3 DB 6 1 DB REFRIGERANT R 22 CHARGE 810 28 60z 1040 36 702 3ROW 18STACKS 3ROW 15STACKS CONDENSER 2ROW 18STACKS L BENDING TYPE 2ROW 16STACKS FAN INDOOR BLOWER FAN OUTDOOR PROPELLER TYPE FAN WITH SLINGER RING FAN SPEEDS FAN COOLING HEATING 1 2 2 1 2 2 MOTOR 6 POLES OPERATION CONTROL TOUCH PANEL ROOM TEMP CONTROL THERMISTOR IEP BECTON CONTROL VERTICAL LOUVER RIGHT amp LEFT HORIZONTAL LOUVER UP amp DOWN CONSTRUCTION SLIDE IN OUT CHASSIS ELECTRIC HEATER 3 5KW 230V COMPRESSOR INTERNAL OVERLOAD PROTECTOR PROTECTOR FAN MOTOR INTERNAL THERMAL PROTECTOR ELECTRIC HEATER FUSE LINK BIMETAL THERMOSTAT 1 6m 3 W
18. cooling season is over This odor caused by fine dust particles on the heater will disappear quickly 13 Hoom Air Conditioner Disassembly l Disassembly Before the following disassembly power switch is set to off and disconnected the power cord 1 Front grille 1 Open the inlet grille upward or downward 2 Remove the screw which fastens the front grille 3 Pull the front grille from the right side 4 Remove the front grille See Fig 16 5 Re install the component by referring to the removal procedure 00620 Mark A of inlet grille means opening direction 2 Cabinet 1 After disassembling the front grille remove the screws which fasten the cabinet at both sides Keep these for later use 2 Remove the two screws which fasten the cabinet at back See Fig 17 3 Pull the base pan forward 3 Control box Remove the front grille Refer to section 1 2 Pull the base pan forward so that you can remove the 2 screws which fasten the cover control at the right side See Fig 18 3 Remove the 3 screws which fasten the controlbox See Fig 18 4 Discharge the capacitor by placing a 20 000 ohm resistor across the capacitor terminals Figure 17 5 Disconnect two wire housings in the control box 6 Pull the control box forward completely 7 Re install the components by referring to the removal procedure See Fig 18 Refer to the wiring diagram found on page 29 30 in t
19. e and leave the valves closed The vacuum pump is now pulling through valves A and B up to valve C by means of themanifold and entire system CAUTION If high vacuum equip ment is used just crack valves A and B for a few minutes then open slowly with the two full turns coun terclockwise This will keep oil from foaming and being drawn into the vacu um pump 3 Operate the vacuum pump for 20 to 30 minutes until 600 microns of vacuum is obtained Close valves A and B and observe vacuum gauge for a few minutes A rise in pressure would indicate a possible leak or moisture remaining in the sys tem With valves A and B closed stop the vacu um pump 4 Remove the hose from the vacuum pump and place it on the charging cylinder See Fig 35B Open valve C Discharge the line at the manifold connection 5 The system is now ready for final charging 6 Recharge as follows 1 Refrigeration cycle systems are charged from the High side If the total charge cannot be put in the High side the balance will be put in the suction line through the access valve which you installed as the system was opened 2 Connect the charging cylinder as shown in Fig 35B With valve C open discharge the hose at the manifold connection 3 Open valve A and allow the proper charge to enter the system Valve B is still closed 4 If more charge is required the high side will not take it Close valve A 5 With the unit running open
20. essor only fails to start Drop of power voltage lt Improper thermostat setting Defect of fan motor Defect of compressor capacitor capacitor Loose terminal connection Irregular motor resistance Irregular motor insulation Replacement of fan motor Regular but fails to start Capacitor check lt Improper wiring Replacement lt Irregular motor resistance Irregular motor insulation O Replacement of compressor locking of rotor metal Replacement of compressor Motor damaged 25 Room Air Conditioner Troubleshooting Guide Room Air C NAME PLATE RATING MINIMUM MAXIMUM 208 230 10 187V 253V 115 10 104V 126V COMPLAINT CAUSE REMEDY Fan motor will not run No power Check voltage at outlet Correct if necessary Power supply cord Check voltage to rotary switch If none check power supply cord Replace cord if circuit is open Rotary switch Check switch continuity Refer to wiring diagram for terminal identification Replace switch if defective Wire disconnected or con nection loose Connect wire Refer to wiring diagram for terminal identification Repair or replace loose terminal Capacitor Discharge capacitor before testing Test capacitor Replace if not within 10 of manufacturer s rating Replace if shorted open or damaged Will not rotate Fan blade hittin
21. f the win dow stool between the side window stop moldings S upport Loosely attach the sill bracket to the support bracket P d _ Bracket using the carriage bolt and the lock nut Gatriage M Screw Figure 5 2 Attach the sill bracket to the window sill using the screws Type B Carefully place the cabinet on the window stool and align the center mark the bottom front with the center line marked window stool Support Bracket Carriage bol and lock nut Figure 6 3 Using the M screw and the lock nut attach the support bracket to the cabinet track hole Use the first track hole after the sill bracket on the outer edge of the window sill Tighten the carriage bolt and the lock nut Be sure the cabinet slants outward retainer f CAUTION Do not drill a hole in the bottom pan The unit is designed operate with approximately 1 2 of water in bottom pan 4 Pull the bottom window sash down behind the Top retainer bar until they meet NOTICE 1 Do not pull the window sash down so tightly that the movement of Frame curtain is restricted Attach the cabinet to the window stool by driving the screws Type B through the cabinet into window stool 2 The cabinet should be installed with a very slight tilt downward toward the outside Figure 9 11 Air Conditioner Q Lock nut Machine screw Type D and lock nut Outer edge
22. g shroud or blower wheel hitting scroll Realign assembly Units using slinger ring for condenser fan must have 1 4 to 5 16 inch clearance to the base If it hits the base shim up the bottom of the fan motor with mounting screw s Check fan motor bearings if motor shaft will not rotate replace the motor Fan motor runs intermittently Revolves on overload Check voltage If not within limits call an electrician Test capacitor Check bearings Does the fan blade rotate freely If not replace fan motor Pay attention to any change from high speed to low speed If the speed does not change replace the motor Fan motor noise Fan If cracked out of balance or partially missing replace it Blower If cracked out of balance or partially missing replace it Loose clamper Tighten it Worn bearings If knocking sounds continue when running or loose replace the motor If the motor hums or noise appears to be internal while running replace motor Compressor will not run but fan motor runs Voltage Check voltage If not within limits call an electrician Wiring 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 If not per wiring diagram correct Rotary Check for continuity refer to the wiring diagram for terminal identification Replace the swi
23. his manual and on the control box Figure 18 Service Manual 14 Disassembly 4 Cover at the top 1 Remove the front grille Refer to section 1 2 Remove the cabinet Refer to section 2 3 Remove 11 screws which fasten the brace and covers 4 Remove the covers and the brace See Fig 19 5 Re install the components by referring to the removal procedure above Figure 19 5 Blower 1 Remove the cover Refer to section 4 2 Remove the 3 screws which fasten the evaporator at the left side and the top side See Fig 19 3 Move the evaporator sideward carefully 4 Remove the 2 terminals carefully See Fig 20 5 Remove the 3 screws which fasten the Heater Cover See Fig 20 6 Remove the Heater Cover See Fig 20 7 Remove the orifice from the air guide carefully See Fig 21 8 Remove the clamp which secures the blower with plier See Fig 21 9 Remove the blower with plier or your hand without touching blades See Fig 22 10 Re install the components by referring to the removal procedure above Figure 21 Figure 22 15 Room Air Conditioner Disassembly 6 Fan 1 2 ON O OQ Remove the cabinet Refer to section 2 Remove the brace and shroud cover Refer to section 4 Remove the side cover with 2 screws See Fig 23 Remove the 5 or 6 screws which fasten the condenser Move the condenser sideways carefully Remove the clamp which
24. rounded 9 Connect the drain tube to the base pan hole in the rear side if you need to drain consult a dealer Plastic hose or equivalent may be connected to the drain tube The grille is designed to clean the filter both upward and downward A BEFORE ATTACHING THE FRONT GRILLE TO THE CAB INET IF YOU WANT TO PULL OUT THE FILTER UPWARD 1 Open the inlet grille slightly a 2 Turn inside out the front grille a 3 Disassemble the inlet grille from the front grille with separating the hinged part by inserting a straight type screw driver tip b 4 Then rotate the inlet grille 180 degrees and insert the hooks into bottom holes of the front grille 5 Insert the filter and attach the front grille to the cabinet B IF YOU WANT TO PULL OUT THE FILTER DOWNWARD THE GRILLE IS ALREADY DESIGNED FOR THAT WAY Service Manual 8 Installation 1194 61 4 All supporting parts should be secured to firm wood masonry or metal WINDOW REQUIREMENTS 1 This unit is designed for installation in standard double hung windows with actual opening widths from 29 to 41 The top and bottom window sashes must open sufficiently to allow a clear vertical opening of 18 from the bot tom of the upper sash to the window stool 2 The stool offset height between the stool and sill must be less than 1 Installation Kits Foam strip Foam PE Top retainer bar 2 Plain Back Adhesive Backed Foam PE Adhesive Backed
25. stall the unit by yourself customer There is risk or fire or electric shock There is risk of fire electric shock explosion or injury Be cautious when unpacking and installing Do not store or use flammable gas or com the product bustibles near the air conditioner Sharp edges could cause injury Be especially careful There is risk of fire or failure of product of the case edges and the fins on the condenser and evaporator Be sure the installation area does not deterio rate with age If the base collapses the air conditioner could fall with it causing property damage product failure and per sonal injury 4 Room Air Conditioner Dimensions Dimensions This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the air conditioner This symbol indicates special notes Model LWHD1800HR LWHD2400HR Dimension mm inch 660 26 660 26 H mm inch 428 16 27 32 428 16 27 32 D mm inch 675 26 9 16 770 30 5 16 Service Manual 5 Specfications l Product Specifications MODELS ITEMS LWHD1800HR LWHD2400HR POWER SU
26. tch if circuit is open Service Manual 26 Troubleshooting Guide COMPLAINT CAUSE REMEDY Compressor will not run but fan motor runs Thermostat Check the position of knob If not at the coldest set ting advance the knob to this setting and restart unit Check continuity of the thermostat Replace ther mostat if circuit is open Capacitor Discharge capacitor before servicing Check the capacitor Replace if not within 10 of manufacturers rat ing Replace if shorted open or damaged Compressor Check the compressor for open circuit or ground If open or grounded replace the compressor Overload Check the compressor overload if externally mounted Replace if open If the compressor tem perature is high remove the overload cool it and retest Compressor cycles on overload Voltage Check the voltage If not within limits call an electrician Overload Check overload if externally mounted Replace if open If the compressor temperature is high remove the overload cool and retest Compressor cycles on overload Fan motor If not running determine the cause Replace if required Condenser air flow restric tion Remove the cabinet inspect the interior surface of the condenser if restricted clean carefully with a vacuum cleaner do not damage fins or brush Clean the interior base before reassembling Condenser fins damaged
27. valve B and add the balance of the charge a Do not add the liquid refrigerant to the Low side b Watch the Low side gauge allow pressure to rise to 30 Ibs c Turn off valve B and allow pressure to drop d Repeat steps B and C until the balance of the charge is in the system 6 When satisfied the unit is operating correctly use the pinch off tool with the unit still running and clamp on to the pinch off tube Using a tube cut ter cut the pinch off tube about 2 inches from the pinch off tool Use sil fos solder and solder pinch off tube closed Turn off the unit allow it to set for a while and then test the leakage of the pinch off connection Service Manual 20 Disassembly Equipment needed Vacuum pump Charging cylinder Manifold gauge Brazing equipment Pin off tool capable of making a leak proof seal Leak detector Tubing cutter Hand Tools to remove components Service valve CONDENSER COMPOUND ME HIGH PRESSURE SIDE O MANIFOLD GAUGE B CAPILLARY TUBE SEE INSETS BELOW EVAPORATOR LOW PRESSURE SIDE COMPRESSOR EXTERNAL VACUUM PUMP CHARGING CYLINDER Figure 31A Pulling Vacuum Figure 31B Charging 21 Room Air Conditioner Schematic Diagram Schematic Diagram E ELECTRIC HEATING MODEL POWER INPUT WH BL BK BR Ribbed Plain GN YL
28. ver to the OPEN position The damper is opened and room air is exhausted CLOSE VENT OPEN REMOTE CONTROLLER Y Temp A ot Gb oO AUTO 11 h 4 MNT SPEED SWING 5 8 Auto gt c 5 m E POWER BUTTON To turn the air conditioner ON push the button To turn the air conditioner OFF push the button again This button takes priority over any other buttons OPERATION MODE SELECTION BUTTON Everytime you push this button it will toggle COOL and HEAT ON OFF TIMER BUTTON Everytime you push this button timer is set as follows 1Hour 2Hours gt 3Hours gt 4Hours gt 5Hours gt 6Hours gt 7Hours gt 8Hours gt 9Hours gt 10Hours gt 11Hours gt 12Hours gt Cancel FAN SPEED SELECTOR Everytime you push this button it is set as follows f 9 Low F1 Hil Fe ROOM TEMPERATURE SETTING BUTTON This button can automatically control the temperature of the room The temperature can be set within a range of 60 F to 86 F by 1 AUTO SWING This button can automatically control the air flow direction 7 ENERGY SAVER The fan stops when the compressor stops cooling Approximately every 3 munutes the fan will turn on and check the room air to determine if cooling is needed 8 REMOCON SIGNAL RECEIVER N gt c o CAUTION A slight heat odor may come from the unit when first switching to HEAT after the
29. y referring to the removal procedure above See Figure 30 Figure 29 17 Hoom Air Conditioner Disassembly 13 SYNCHRONOUS MOTOR OQ Remove the control box Refer to section 3 Unfold the control box Refer to section 10 Remove the crankshalt Disconnect all the leads of the synchronous motor Remove the 2 screws which fasten the synchronous motor See Fig 30 Re install the components by referring to the removal procedure above Figure 30 Service Manual 18 Disassembly CAUTION Discharge the refrigerant system using Freon Recovery System lf there is no valve to attach the recovery system install one such as a WATCO A 1 before venting the Freon Leave the valve in place after servicing the system 16 CONDENSER 1 Remove the cabinet Refer to section 2 2 Remove the brace and the shroud cover Refer to section 4 3 Remove 2 screws which fasten the side cover See Fig 31 4 Remove the 5 or 6 screws which fasten the condenser 5 After discharging the refrigerant completely unbraze the interconnecting tube at the condenser connections 6 Remove the condenser 7 Re install the components by referring to notes See Fig 31 17 EVAPORATOR 1 Remove the cabinet Refer to section 2 2 Remove the top cover and the brace Refer to section 4 3 Discharge the refrigerant completely 4 Remove the 3 screws which fasten the evaporator at the
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