LG Large Duct-Type Air Conditioner
Contents
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4. Key input of remote controller does not respond NO 1 Check or repair Connector wiring 2 Exchange the Connector YES 1 Replace the pressed key 2 Exchange the Knob or Key YES 1 Remove cause of Check 2 Reenergize the power supply NO 1 Check or exchange IC01D 7812 on the MAIN PCB N 9 1 Exchange OSC 2 Check the pattern around OSC on the remote controller PCB YES 1 Check Keys a 2 Repair or exchange Key LCD display on the remote controller shows some trouble YES 1 Check crack damage of LCD 2 Check LCD pattern YES 1 Check or repair all IC with dust or moisture on the PCB 2 Exchange remote controller PCB 19 Electronic parts Troubleshooting Guide Possible trouble 5 No cooling operation performed ue gt 1 Press power ON OFF button Is the unit operating NO 1 Press cooling operation key Is the cooling mode 2 After reenergizing power supply press power ON OFF button 1 Set flowing Room Tombs Set Temp lt Room Temp Is the output voltage of Micom s 4PIN on the MAIN DCOV NO gt 1 Check or exchange ICO2D 2 Check 3 minutes time delay Is the voltage between 1PIN of CN COMP and NEUTRAL 220V NO gt 1 Check or exchange RY4 Is the magnetic contactor NO 1 Check the wiring of Ma
5. 1 Rewrite LY Y d Ux my Communication Parts Hall Kd e ud Voltage Input Current PWM swes Magnet Error R S T N Detector ENABLE On Off Output Indicator Troubleshooting Guide Input Voltage Detection ses e PEt nang aupra IPM Motor Drive IC i Aer Lie E Input Current Detection i a 24 Hall sensor Input DC Link converter Detection Noise Filter Troubleshooting Guide 1 Error indicator The function is to self diagnosis air conditioner and express the troubles if there is any trouble Error mark is displayed on wired remote controller and LED of outdoor unit control board f more than two troubles occur simultaneously lower number of error code is first displayed After error occurs if error is released error LED is also released simultaneously 3 Indoor Error 3 Outdoor Error Error Code Contents Case of error Indoor Status 1 Air sensor open short Open Short Off 2 Inlet pipe sensor Open Short Off 3 Communication Indoor lt gt Wired R Control Communication Poorly Off 4 Drain pump Float switch Float switch Open Off 5 Communication Indoor gt Outdoor Communication Poorly Off 6 Outlet pipe sensor Open Short Off 7 Different mode operation Different mod
6. LG Large Duct Type Ar DNE MODELS AB H1208VA0 Contents Model Number General Blur pet et PIE Toe Troubleshooting G lde 4 ori nuire atii road amiga 1 Features of Exploded View and Replacement Parts 5 Model Number Nomenclature AB H1208VA0 Development Sequence A Basic Type Chassis Name V BV Chassis Electric Standard Volts Freq Phase 8 380 415V 50Hz 30 Cooling Capacity 120 120 000 Btu h Model Type H Heat Pump Type of Air Conditioner A Changwon R 410A B Duct General Data Indoor units Indoor unit type Ducted Type Model AB H1208VA0 B120AH 5 0 Power supply N Hz 3 380 415 50 Gross cooling capacity kW 34 3 Btu h 117 000 Net cooling capacity kW 32 8 Btu h 112 000 Heating capacity kW 38 1 Btu h 130 000 Current Rated running current A 2 05 Fan Motor type BLDC Fan type Sirocco fan Motor output W x Number of unit 1 491 x 1 Air flow rate H M L CMM 105 97 90 CFM 3 708 3 426 3 179 External static pressure mmAq 20 Capacitor pF V ac Drive Direct drive Coil Rows
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8. Is the magnetic e i ikele NO 1 Check the wiring or Magnetic contactor for humidifier OK contactor 2 Exchange Magnetic contactor Check the humidifier 22 Electronic parts Troubleshooting Guide Possible trouble 8 Indoor motor does not operate Is the unit operating NO Is the output NO gt 1 Press power ON OFF button 2 Reconnect the power supply voltage of Micom s 10PIN on the MAIN PCB 5V Is the voltage between 1PIN of CN8 and NO gt 1 Check or exchange IC01D 1 020 on the main NEUTRAL 220V Is the Power relay for NO gt 1 Check or exchange RY10 1 Check the wiring of indoor motor OK Check the indoor motor Possible trouble 9 Outdoor motor does not operate NO Power relay 2 Exchange Power relay Is it cooling operation NO gt 1 Press power ON OFF button 2 Select cooling operation 1 Set following Is the compressor operating 1 Check wiring for outdoor motor and magnetic contactor 2 Check outdoor motor amp capacitor 23 Set temp lt Room temp 2 Wait if the unit has operating with 3 minute time delay Features of Controller 5 WO 1740 OR NN 31 D SD
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10. 600V W6200 FILTER CIRC EMC 6200J000125 263230 4 THERMISTOR ASSEMBLY 6323A30004L RETURN AIR SENSOR 263230 5 THERMISTOR ASSEMBLY 6323AQ3226Y PIPE EVA OUT TEMP SENSOR 263230 6 THERMISTOR ASSEMBLY 6323A30002C PIPE EVA IN TEMP SENSOR 29 Exploded View and Replacement Parts List 2 Outdoor Uni Exploded View 1208 0 959010 435312 549610 54032 546810 VY S AWWYWY Lie VA VAY vvv Y DN Exploded View and Replacement Parts List Rep
11. Gross cooling capacity Net cooling capacity Heat of evaporator fan motor 4 Conversion Formula kW CFM Btu h x 0 0002931 CMM x 35 3 Dimensions Model No AB H1208VA0 B120 5 0 1 Indoor Unit 1700 1600 798 837 712 2 Outdoor Unit 730 700 bolt hole 1280 900 bolt hole 690 WSZ i fe 1552 SNS Mi S 1555 670 fx _ 1444 Air inlet D Service Panel lt gt Air outlet gt 160 a COO 1 5 Air inlet Knockout hole For the control wiring the power supply refrigerant connecting pipe Knockout hole For the control wiring the power supply refrigerant connecting pipe Wiring Diagram 1 Indoor Unit Notes BLACK REACTOR REACTORI CN REACTOR2 RETURN AIR THERMISTOR BLDC DRIVER INDOOR MOTOR CNR CNS CNT CNN CN PWR NOISE FILTER N2 T2 52 51 2 BR REMOTE CONTROLLER FUSE 600V 15A NOTE sm Jaw BR
12. Repair or replace it Wire short Electric Wiring Cut off of wiring Check it with a tester Rewiring or repair Short circuited on operation 4 Only compressor does not work WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Magnetic switch for compressor motor Defective contact magnetic coil troubled Check it with the eyes on with a tester Repair or replace it Compressor motor Troubled over heated layer short Check how it is insulated Replace or repair the compressor High pressure switch Option part Troubled or defective contact or operating Check it with a tester Replace it if neces sary Electric circuit Defective connection or disconnection of the circuit for compressor Check it with a tester Rewiring or push reset button 15 Troubleshooting Guide 2 The Units discontinue after the operation started WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Outdoor coil Coil is dirty 1 Checking Wash it by means of something like chemical washing In condensable gas blended Air intruded into the refrigerant pipe line 1 In the event that difference between the saturating temperature corresponding to high pressure and the temperature of air discharged from the outdoor coil is more than 15 C incondensable gas may be blended Extract air by vacuum pump then replenish c
13. outlet air Repair clogging in refrigera COOLING 7 10 C tion circuit HEATING 15 17 C Replacement of compressor Troubleshooting Guide Fails to Start Y Check power source Check control switch setting Check of circuit breaker and fuse Check control switch Compressor only fails to start Drop of power voltage lt lt Y Electric heater is not energized Fan only fails to start Y Improper wiring Loose terminal connection Improper wiring Y Irregular motor resistance 2 Y Irregular motor insulation Replacement of compressor Y Regular but fails to start Y Replacement of compressor 13 Y Defect of fan motor capacitor Irregular motor resistance Irregular motor insulation Q Replacement of fan motor Improper electric heater Replacement of electric heater Troubleshooting Guide VOLTAGE LIMITS NAME PLATE RATING MINIMUM MAXIMUM 380 415 V 342 V 456 V 1 No cooling and heating operation performed 1 Both the blower and the compressor do not work
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16. WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Other parts except the unit Electric supply interrupted Defective power wiring Cut off power fuse Measure power sypply with a tester in case that the same power source is supplied to other equip ment except the unit what and where troubled can be discovered by checking the operation of other equipment Repair a switch box and relative instrument Replacement of fuse Request a power supplier to repair Too low voltage Measure it with a tester Check the power source Use a thick cable if nec essary Magnetic switch for com pressor amp fan motor Control point is on condi tion of OFF due to trou ble Make short circuit then measure it with tester Replace it if necessary Operating switch Troubled or defective contactor Check it with the eyes or tester Repair or replace it 2 Only Indoor blowers do not work WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Motor Over heated Check it with tester Repair or replace it Wiring short Reactor Defected Check it with a tester Replace it Electric wiring Cut OFF of wiring Short circuited on operation Check it with a tester Rewiring or Repair 14 Troubleshooting Guide 3 Only outdoor fan does not work WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Motor Over heated Check how it is insulated
17. input voltage of remote controller 1 Exchange remote controller 2 Check or exchange the Main PCB ASS Y NO The remote controller does not operate NO NO 18 gt 1 Exchange IC02D 7805 on 1 Check the Fuse 2 Check the wiring of AC220V 1 Exchange the transformer 2 Check the connector of transformer the main PCB 2 Check the 0010 0050 05 on the main PCB 1 Exchange 1 010 7812 on the main PCB 2 Check the 0010 0050 R05C on the main 1 Exchange 1C01A 7036 on the main PCB 1 Exchange OSC 2 Check the pattern around OSC on the main PCB 1 Exchange or exchange FUSE 2 Check the input voltage of Main PCB ASS Y 1 Check or exchange the IC01D on the Main PCB 2 Check or exchange the Connector RED BROWN of the remote controller Electronic parts Troubleshooting Guide Possible trouble 3 Is the connection between MAIN PCB and remote controlle correct YES 5 any key on the remote controller keeping pressed Is there Check F on the remote controller LCD Is the input power voltage of emote controller 12 5 there OSC vibration on the remote controller PCB Do Keys have troubles Exchange remote controller Possible trouble 4 Are there trouble in LCD parts Is there trouble in the remote controller PCB ASS Y NO Exchange remote controller
18. x Column x FPI mm 3R x 24C x 17 Dimensions WxHxD Body mm inch 1 600 x 720 x 800 63 0 x 28 3 x 31 5 Weight Body kg Ibs 130 287 Air filter prefilter Sound level H M L dB A 3 53 51 49 Piping Liquid mm inch 15 88 5 8 connections Gas mm inch 28 58 11 8 Drain OD ID mm 34 28 Dehumidification rate 10 Safety devices Temperature sensor Thermistor Referigerant R410A Referigerant control LEV Connectable outdoor unit Single Power supply cable indoor No x mm 4x 1 25 Transmission interunit cable indoor to outdoor No x mm 2x 1 25 Note 1 Capacities are based on the following conditions Cooling Indoor Temperature 27 C 80 6 F DB 19 C 66 2 F WB Outdoor Temperature 35 C 95 F DB 24 C 75 2 F WB Heating Indoor Temperature 20 C 68 F DB 15 C 59 F WB Outdoor Temperature 7 C 44 6 F DB 6 C 42 8 F WB Piping Length Interconnecting Piping Length 7 5m Level Difference of Zero 2 Gross cooling capacity Net cooling capacity Heat of evaporator fan motor Conversion Formula kW Btu h x 0 0002931 CMM x 35 3 General Data Outdoor units Outdoor unit SpA al B120AH SVO Rated capacity Gross cooling kW 34 3 Btu h 117 000 Net cooling kW 32 8 Btu h 112 000 Heating kW 38 1 Btu h 130 000 Rated input Cooling kW 14 5 H
19. 11 3 COIL ASSEMBLY SOLENOID 6141A20031M 566000 SWITCH PRESSURE 3A02524L HIGH PRESSURE 263230 1 THERMISTOR 6323A20020P CONDENSER AMBIENT TEMP 263230 2 THERMISTOR 6323A20020Q COMP A DISCHARGE SUCTION 263230 3 THERMISTOR 6323A20020R COMP B DISCHARGE 31 June 2006 P No 3828 20845 Printed in Korea
20. 27 Error mode Cause of error Sensing condition of error Method of SVC Remark OPEN SHORT of CH01 Room Temp sen SOr OPEN SHORT Indoor Pipe sensor Communication CH03 Error between indoor PCB and Remote controller Communication Error between 05 indoor amp door PCB High Pressure eet Switch Trip CH33 CH44 CH45 CH47 CH48 CH54 Exploded View and Replacement Parts List 1 Indoor Unit Exploded View 1208 0 C208 60 Yo 4 p 28 Exploded View and Replacement Parts List Replacement Parts List AB H1208VA0 DESCRIPTION REMARK No AB H1208VA0 336610 HOUSING ASSEMBLY 3661A10031A 344170 1 ROTOR ASSEMBLY 4413A20001A 344170 2 STATOR ASSEMBLY 4417A20001B 349610 MOUNT ASSEMBLY MOTOR 4961A10014A 359012 FAN ASSEMBLY BLOWER 5835A20003G 349600 BRACKET ASSEMBLY 4811A10003B 342800 BEARING 4A00131C 330870 DRAIN PAN ASSEMBLY 3087A20032A 354210 EVAPORATOR ASSEMBLY 5421A20217A 152302 FILTER MECH 5230A30017B 267110 REMOTE CONTROLLER ASSEMBLY 6711A20127B 249951 CONTROL BOX ASSEMBLY INDOOR 4995A20526A 268714 1 PCB ASSEMBLY 6871A00012A Main PCB 268714 2 PCB ASSEMBLY 6871A10222A BLDC Motor 658740 REACTOR 5874A90003H 566001 1 MAGNETIC CONTACTOR 6600B000039 WOFZZ FUSE OFZZA90001M 15
21. BROWN WH WHITE FIER 3854 21016 To Outdoor Unt ORANGE YELLOW BROWN RED WHITE BLUE GREEN YELLOW COMPRESSOR 2 Outdoor Unit FACTORY WIRING OPTIONAL WIRING Levi ate HO RD 00006 09900 lt Magnetic Contactor CN_3PHASE CN_COMP 2 I Crankcase Heater vi v2 5 5 BL 2 Compressor 4 5 Solenoid m SV MAIN 7 5 Solenoid Magnetic Valve 1 Concise Heater PENES flaco D 4 Valve 2 pls 8 te High Pressure Switch 5 5 CN POWER CN 2 CN TH3 con EAE j s GNYL NOTE 5 b WH WHITE RD RED BL BLUE BR BROWN yr yy YL YELLOW GNYL 3854 20684 Power Supply 380 415V To Indoor Unit FIELD WIRING Troubleshooting Guide 1 1 General Information DC Link Volt DC Link Volt Detector
22. ck Sum Error Check sum mismatching Off Troubleshooting Guide 3 Control Parts 1 Troubleshooting CH10 When CH10 error occurs check error indication LED on FAN BOARD Fan board Error LED Title Cause of error Check point Mechanical Locking The abnormal connection of Hall sensor 10 BLDC Fan Lock Miss connection The abnormal connection of U V W Mechanical Locking of Fan Mechanical Locking Miss connection Miss connection The abnormal connection of Hall sensor The abnormal connection of U V W Instant Overcurrent Max Current 21 IPM Fault Over Instant over current RMS current 20Az current Over Rated current Peak current 24 Poor insulation of IPM Poor insulation of Fan Overload Mechanical Locking of Fan Check the overload condition 22 Over current 6A E Mechanical Locking of Fan Check the drop of power source Check the power source Sum Error 2 Troubleshooting CH15 Fan board Error LED mus Cause of error 23 DC Link Low Volt DC link volt is 280Vdc Check the components Faulty sensor Malfunction of current detection circuit 40 CT Circuit E Open Short oPEN sHORT Malfunction of External voltage of CO1N Is 4 0Vdc 20A z power Check the drop of power source EB EEPROM Check Check sum error Check the connection port Check the
23. e operation Off 9 EEPROM check sum Check sum mismatching Off 10 BLDC motor fan lock Motor not operation Off 15 Communication indoor lt gt Fan Communication Poorly Off Error Code Contents Case of error Indoor Status 24 High Pressure Switch operation High P S operates 5times fort hour Off 33 D Pipe Temp High D Pipe Temp 120 C Off 44 Air Sensor open short Open Short Off 45 Outlet Pipe Sensor open short Open Short Off 47 D Pipe Sensor open short Open Short Off 48 S Pipe Sensor open short Open Short Off 51 Excess Capacity Indoor load excesses 120K Off 54 Phase error Continually 5times error Off Troubleshooting Guide 2 Error indicator Fan Board When CH10 or CH15 error occurs check error indication LED on fan borad Fan board Error Ex Error 21 IPM fault RED LEDO2G GREEN gt 1 2 Times 2 Times LEDO1G 10 Error Code Contents LEDO1G LEDO2G Case of error Outdoor Red Green Status 10 Fan Lock Fan malfunction Locking Status 21 IPM Fault Over current 1time Fan malfunction Over Current Off 22 CT 2 Max Current g Current is Off 23 DC Link Low Volt 3time DC Link volt Is 280V Off 40 CT Circuit 4time 9 CT Circuit malfunction 20Az Off 52 Communication Error g 2time Communication Poorly Off 60 EEPROM Che
24. eating kW 12 5 Energy label Running current Cooling A 24 Heating A 21 Starting current Cooling A Heating A Power supply 3 380 415 50 Power supply cable outdoor No x mm 5x8 5 Transmission interunit cable outdoor to indoor No x mm 2x1 25 Dimensions WxHxD mm inch 1 280 x 1 520 x 730 50 4 x 59 8 x 28 7 Net weight kg lbs 300 661 Max number of connectable indoor units 1 Type Scroll 1 x AR073YAB Compressor ety model 1 AR081YAB Constant Motor type PSC Oil charge volume cc 2 325 x 2 Oil type FVC68D PVE Charge at 7 5m g oz 8 000 282 2 Refrigerant Type R410A Control LEV Heat Exchanger Rows x Column x FPI 2R x 88C x 17 Defrosting method Reversing cycle Capacitor 10 450 Drive Direct drive Discharge direction Side Top Top discharge Air flow rate x No of fan CMM CFM 180 6 400 Sound level Sound pressure at 1m dB A 3 65 Piping connections Liquid mm inch 15 88 5 8 Gas mm inch 28 58 11 8 Max piping length Indoor unit Outdoor unit m 50 Max elevation Indoor unit Outdoor unit m 30 Note 1 Capacities are based on the following conditions Cooling Indoor Temperature 27 C 80 6 F DB 19 C 66 2 F WB Outdoor Temperature 35 C 95 F DB 24 C 75 2 F WB Heating Indoor Temperature 20 C 68 F DB 15 C 59 F WB Outdoor Temperature 7 C 44 6 F DB 6 C 42 8 F WB Piping Length Interconnecting Piping Length 7 5m Level Difference of Zero 2
25. gnetic for compressor OK 1 Check Compressor and Capacitor for Compressor NOTE model has not capacitor for compressor contactor 2 Exchange Magnetic contactor 20 Electronic parts Troubleshooting Guide Possible trouble 6 No heater operation performed NO gt j 1 Select heater operation mode Is the heater operation NO 1 Reconnetting power supply press Heater Key Is the heater LCD ON NO 1 Set following Set temp gt Room temp Set temp gt Room temp Is the output voltage of Micom s 13PIN on the MAIN PCB 5V NO 1 Check or exchange IC01D IC02D on the MAIN PCB Is the voltage between 1PIN of CN6 and NEUTRAL 220V NO 1 Check or exchange RY13 NO 1 Check the wiring of Magnetic Is the magnetic contactor for heater OK contactor 2 Exchange Magnetic contactor Check or exchange E Heater 21 Electronic parts Troubleshooting Guide Possible trouble 7 No humidifier operation performed NO 1 Press cooling or fan operation or heater operation key Is the indoor fan operation Is the HUMID LCD ON NO 1 Press humidifier Key Is the output voltage of Micom s 3PIN on he MAIN PCB 5V NO 1 Check or exchange ICO2D on the MAIN PCB Is the voltage between 1PIN of CN5 and NEUTRAL 220V NO 1 Check or exchange RY3
26. harge the refrigerant High pressure switch Option part Improper adjustment Check it with a pressure gauge Read just it to normal operating pressure Note Don t alternate the specified adjusting pressure If the adjusted pressure exceed the specified range it will cause a great accident Outdoor Fan Reverse rotation of fan Obstacle Air short circuit 1 Confirm the wind blowing out upward Check it with eyes If reversed connect interchanged wires to each terminal Power wirings Note Use an appropriate measuring instrument for readjustment 1 High pressure switch moves 16 Troubleshooting Guide 3 The unit is working but not cooling and heating sufficiently Both blower and compressor are working WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Load Much Cooling or Heating Heat load increased Do necessary disposal load Window or door has many respectively cracks or gaps Air flow Obstacle disturbs Intake Checking Correct it of uniform airflow Short air volume Reverse rotation of Checking Correct it blower Refrigerant Shortage in the charged Coil inlet pipe is frosted Recharge it refrigerant Repair the leakage spot Air passage Improper or foreign bodies Checking Correct or clear the foreign bodies Air filter Clogged with dust Checking Cleaning 4 All the functions are performed as specified but very nois
27. lacement Parts List AB H1208VA0 DESCRIPTION ee REMARK No AB H1208VA0 559010 FAN ASSEMBLY PROPELLER 5901A10029A 435312 GRILLE ASSEMBLY DISCHARGE 3531A20211F 546810 MOTOR ASSEMBLY OUTDOOR 4681A10014H 549610 MOUNT ASSEMBLY MOTOR 4960A10022A 649950 CONTROL BOX ASSEMBLY 4995A10163A 668711 PCB ASSEMBLY 6871A20583W 566001 2 SWITCH MAGNET 6600B000041 W6920 RELAY 3A00261C WOCZZ CAPACITOR 3A00988G 10 450VAC 554032 1 CONDENSER ASSEMBLY 5403A20160A PCM 554032 2 CONDENSER ASSEMBLY 5403A20160B PCM 554032 3 CONDENSER ASSEMBLY 5403A20159A PCM 554032 4 CONDENSER ASSEMBLY 6711A20127B PCM 554032 1 CONDENSER ASSEMBLY 5403A20160G GOLD 554032 2 CONDENSER ASSEMBLY 5403A20160H GOLD 554032 3 CONDENSER ASSEMBLY 5403A20159G GOLD 554032 4 CONDENSER ASSEMBLY 5403A20159H GOLD 554160 1 COMPRESSOR 2520UBBY2BA AR081YAB 554160 2 COMPRESSOR 2520UBDY2AB 7 548490 ACCUMULATOR 4849A10038A 552203 1 VALVE SERVICE MJX30447401 28 552203 2 VALVE SERVICE 5220A20035A 15 88 552116 TUBE ASSEMBLY REVERSING 5211A12308C 552200 VALVE EXPANSION BODY 5220A90013A 552201 1 VALVE CHECK 3A01020H 552201 2 VALVE CHECK 3A01020L 552204 VALVE SOLENOID 5220A90002H 561410 COIL ASSEMBLY REVERSING VALVE 6141A20010R 561411 1 COIL ASSEMBLY EXPANSION 6141A20011W 561411 2 COIL ASSEMBLY SOLENOID 6141A20031L 5614
28. poor soldering Check point Communication 52 Error Connector connection error Faulty PCB Connection wire break Connection of wire Noise interference 11 Troubleshooting 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 runs but ineffective cooling Ineffective Cooling or Heating Y Y Y Check of cold warm air cir Check of outdoor coil Check heat load increase in culation for smooth flow heat exchanger amp the fan cooling operation operation Unexpected residue Dirty indoor coil Check gas leakage heat exchanger 9 9 Malfunction of fan Repair gas leak Check of inside gas Clogging of air filter Replacement of unit if the pressure unit is beyond repair Adjust refrigerant Added electrical utencil Obstruction at air outlet above trouble Countermeasure against Malfunction of compressor ma clogging in refrigera ion circuit Satisfactory operation with temperature difference of inlet amp
29. y and vibrant WHAT TROUBLED COMPLAINTS HOW TO CHECK REMEDY Compressor Liquid refrigerant flooding Check for refrigerant over charge back from the evaporator Check to see if the intake air temperature is extremely cold Check for insufficient air flow quantity Faulty Discharge valve Checking Replace the and suction valve compressor Blower Fan broken Checking Repair or replace it Foreign matters intruded Screws Looseness or fail off of Checking Correct screws Electric troubles Defective contact Checking Repair and clean or Magnetic contactor Defective contact point replace it Rusting and foreign mat ters in the iron core con tact face Defective con tact of the operating switch Others Improper installation Checking Correct it 17 Electronic parts Troubleshooting Guide Possible trouble 1 Is the input voltage of transformer AC220V Is the output voltage of transformer AC24V amp AC13V Is the output voltage of IC02D 7805 on the main PCB DC5V Is the output voltage of IC01D 7812 on the ain PCB DC12V Is the output voltage of IC01A 7036 on the main PCB DC5V OSC vibration 1 Exchange main PCB ASS Y The unit does not operate NO NO NO NO NO Possible trouble 2 Is the power ON Is the
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