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1. eee renerne 22 SYSTE ST tit de tu iade 22 Troubleshootingig Ude 23 Room Air Conditioner Voltage eic eit prn retento eit endete pendence 25 Exploded VIeW s ems a tect cs dm tef taU 27 Replacement Parts List T e 28 2 Hoom 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 AXCAUTION This symbol indicates the possibility of injury or damage to property only E Meanings of symbols used in this manual are as shown below Q 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 o
2. BK RD BI METAL THERMOSTAT WIRING DIAGRAM 3854A20268W Service Manual 21 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 COOL LOW PRESSURE VAPOR HOT BOIL OFF POINT DISCHARGED COOLED AIR AIR ROOM AIR HEAT LOAD mm A H A 1 Bru OUTSIDE COOLING lt AIR FOR REFRIGERANT MOTOR PASS THROUGH COMPRESSOR 8 LIQUID PRESSURE DROP LIQUID OUTLET 2 HIGH PRESSURE VAPOR uiquip REFRIGERANT RRS Low PRESSURE VAPOR LIQUID REFRIGERANT CAPILLARY TUBE lt Figure 32 22 Room Air Conditioner Troubleshooting Guide In general possible trouble is classified in two kinds 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 app
3. Re install the component by referring to the removal NO oO OD 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 by referring to the removal procedure above See Figure 30 Figure 29 16 Hoom Air Conditioner Disassembly 13 SYNCHRONOUS MOTOR OQ O DN 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 sy
4. Replacement lt Irregular motor resistance Irregular motor insulation O Replacement of compressor locking of rotor metal Replacement of compressor Motor damaged 24 Room Air Conditioner Troubleshooting Guide Room Air NAME PLATE RATING MINIMUM MAXIMUM 208 230 10 187 253 115 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 hitting 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
5. 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 777777777 0 S 7 Figure 26 Service Manual 15 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
6. website http www lgservice co LG LG Room Aur Conditioner MODEL LWHD1800HR LWHD2400HR LG NIT READ THE SAFETY ANUAL D SERVICE PERSONNEL Air Conditioner Service Manual TABLE OF CONTENTS Safety Precautions u u uuu u etalk hie ieee eee ees 3 Dimensions MT Pc N 5 Product Specifications Rellene pe cele 6 rcc m 7 How a 5 the Unit sneen Rr 7 How to use the Reversible Inlet 2 22004200 entrent ennt 7 Window ReEITGTTIODIS 25 resan ooa Due bte dit Toma 8 Installation Kits Contents some models including installation 9 Suggested tool Requirements desee prete tae 9 GAS AU ON C CES 10 Slc m 12 Disassembly 13 Mechanical parts Aa mi sU det SECM 13 Air Handling Parts 14 Electrical Palle 15 Refrigeration Cycle on 18 Schematic DIagram ees 21 Troubleshooting
7. 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 11 Figure 15 Installation Operation VENTILATION The ventilation lever must be in the CLOSE position in order to maintain the best cooling conditions When a fresh air is necessary in the room set the ven tilation lever to the OPEN position The damper is opened and room air is exhausted CLOSE VENT OPEN REMOTE CONTROLLER Y Temp A ot Gb AUTO 11 h 4 MNT SPEED SWING 5 bend Auto gt 5 m e POWER BUTTON To turn the air conditioner ON push the button To turn the air co
8. 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 7 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 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 YF 8 Room Air Conditioner Right frame
9. 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 9 Installation Cabinet Inst 1 Open the window Mark a line on the center of the win dow stool between the side window stop moldings Em Gn 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
10. 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 18 Room Air Conditioner JZ ER Figure 32 NOTICE Replacement of the refrigeration cycle 1 a 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 wise 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 pu
11. 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 switch if circuit is open Service Manual 25 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 i
12. 5220A30006A R 554031 CONDENSER ASSEMBLY FIRST 5403A20004E 5403A20112D R 554160 COMPRESSOR 2520UMGK2AA 2520UHFK2CA R 559010 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 3H02932C 3H02932C R W52106 1 TUBE EVAPORATOR 5210A21083A 5210A22224N R W52106 2 TUBE EVAPORATOR 5210A21090A 5210A22224N R 28 Hoom Air Conditioner May 2006 P No 3828A20841B Printed in Korea
13. L 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 152302 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 263230 THERMISTOR ASSEMBLY 6323A20003F 6323A20003F R 268712 PWB PCB ASSEMBLY DISPLAY 6871A20195V 6871A20195V R 268714 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 349480 ORIFICE 4948A20016A 4948A20016A R 349600 MOUNT MOTOR 4960AR1596A 4960AR2895B R 352111 TUBE ASSEMBLY CONNECTOR 5211AR7059A 5211A20162A R 352113 TUBE ASSEMBLY DISCHARGE SINGLE 5211A30066A 5211A20805V R 35211A TUBE ASSEMBLY SUCTION SINGLE 5211A20204C 5211A20159D R 352390 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 552101 TUBE CAPILLARY 5210A30040N 5210A30040N R 552206 VALVE DRAIN 5220A30006A
14. R SUPPLY 10 208 230V 60Hz 10 208 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 oz 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 TYPE 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. 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 26 Hoom Air Conditioner Exploded View Exploded View Service Manual 27 Replacement Parts List l Replacement Parts List LOCATION PART NO NO casas LWHD1800HR LWHD2400HR VN UPS 130410 BASE ASSEMBLY SINGLE 3041A30002Y 3041A10010K R 130910 CABINET ASSEMBLY SINGLE 3091AR6057X 3091AR6056A R 135303 GRILLE ASSEMBLY INLET 3530AR1604A 3530AR1604A R 135312 GRILLE ASSEMBLY FRONT SINGLE 3531A20073W 3531A20073W R 135510 COVER ASSEMBLY CONTROL 3551A30015A 3551A30015A R 137215 PANEL CONTRO
16. al 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 14 Hoom Air Conditioner Disassembly 6 Fan 1 2 ON O OQ C 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 secures the fan Remove the fan See Fig 23 Re install the components by referring to the removal procedure above 7T 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
17. ality on the produst since this specification may be changed for improving performance 6 Hoom Air Conditioner Installation INSTALLATION How to Install 16 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 mE ro o ER 7 Stuff the foam between the top of the unit and the wall to g bod 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 grounded 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
18. ith 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 19 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 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 20 Room Air Conditioner Schematic Diagram Schematic Diagram E ELECTRIC HEATING MODEL POWER INPUT WH BL BK BR Ribbed Plain GN YL GN THERMISTOR MAIN P W B ASSY DISPLAY P W B ASSY OOP 11 280 oA S ONAL T18VIT2A CN SIGNAL SUB P W B ASSY BK RD FUSE LINK HEATER OO OA O AWWWW O
19. lication 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 23 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 Compressor 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 Q Irregular motor insulation Q Replacement of fan motor Regular but fails to start Capacitor check lt Improper wiring
20. mp 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 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 w
21. nchronous motor See Fig 30 Re install the components by referring to the removal procedure above Figure 30 Service Manual 17 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 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 D 2 Remove the brace Refer to section 4 3 3 After
22. nditioner 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 FAN and HEAT ON OFF TIMER BUTTON Everytime you push this button timer is set as follows 1Hour 2Hours 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 Hi f 9 Low F1 9 Hi 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 F 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 cooling season is over This odor caused by fine dust particles on the heater will disappear quickly 12 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 f
23. on the window stool and Kanmi align the center mark on 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 Ed bottom pan The unit is designed to 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 10 Room Air Conditioner Q Lock nut Machine screw Type D and lock nut Outer edge ol Screw Type B 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
24. r re install 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 f the base collapses the air conditioner could fall with it causing property damage product failure and per sonal injury 4 Hoom Air Conditioner Dimensions Dimensions A This symbol alerts you to the risk of electric shock This symbol alerts you to hazards that could cause harm to the A 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 Product Specifications MODELS ITEMS LWHD1800HR LWHD2400HR POWE
25. ront 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 this manual and on the control box Figure 18 Service Manual 13 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 remov
26. s 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 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

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