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Samsung AQV18EWAN, Service Manual

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Samsung AQV18EWAN Service Manual Download Page 89

Operating Instructions and Installation

Samsung Electronics

4-25

4-3-22 No Power (completely dead)-Initial diagnosis (Not displayed)

  1.   Checklist :
      1) Is input voltage normal? 
      2) Is AC power linked correctly?
      3) Is input voltage of DC regulator IC KA7805 (IC02) normal? (11VDC-12.5VDC)
      4) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC)

  2.   Troubleshooting procedure

PBA should be replaced

No

Replace fuse

No

Reconnect wires correctly

No

The remote control signal receiver on the display 

PBA is wrong.



Check the display board

operate

Press the 

Power Button on the

right side of A/C indoor unit to operate the 

air conditioner

Unplug the power cord and

plug it after 30 seconds

Check the indoor unit

control board

does not operate

Check whether 

2 wires of power cord are

connected correctly to the

terminal block and 

control board.

Check whether

the fuse on the control board is normal. 

FUSE(F701) : T3.15[A]/250[V]

Check the output of 

SMPS on the control board.

Input power: AC230±15%[V]

IC02 Input: DC12[V]

IC02 output: DC5[V]

PBA should be replaced

Yes

Yes

Yes

Yes

Summary of Contents for AQV18EWAN

Page 1: ... can help you sleep quickly and soundly and wake up refreshed Silence Mode n c u o y e d o M e c n e l i S e h t e s u u o y n e h W experience extremely quiet operation of your air conditioner AQV18EWAX Refer to the service manual in the GSPN see the rear cover for the more information INDOOR UNIT OUTDOOR UNIT AQV18EWAN AQV24EWAX AQV24EWAN AQV24EWAX AQV24EWAN S INVERTER ...

Page 2: ... or E102 is displayed 4 3 2 Indoor Temperature Sensor Error When is diplayed 4 7 4 3 3 Indoor Heat Exchanger Temperature Sensor Error When is diplayed 4 8 4 3 4 Indoor Fan Motor Speed Detecting Error When is diplayed 4 9 4 3 5 MPI Error When E186 is displayed 4 10 4 3 6 Outdoor temperature sensor error When E221 is displayed 4 11 4 3 7 Coll temperature sensor error When E237 is displayed 4 12 4 3 ...

Page 3: ...4 WhentheUp DownLouverMotorDoesNotOperate InitialDiagnosis Notdisplayed 4 27 4 3 25 When the remote control is not receiving 4 28 4 4 PCB Inspection Method 4 29 4 4 1 Pre inspection Notices 4 29 4 4 2 Inspection Procedure 4 29 4 4 3 Indoor Detailed Inspection Procedure 4 29 4 4 4 Outdoor Detailed Inspection Procedure 4 30 4 5 Main Part Inspection Method 4 31 15 Exploded Views and Parts List 5 1 5 ...

Page 4: ...HUMDITY CONTROL MPI DRIVE １１ １１ １ １１ １ ...

Page 5: ...１１ ２ 11 2 ...

Page 6: ...Samsung Electronics Block Diagram 11 3 OUTDOOR FAN B D IGBT DIODE IPM SMPS DC_LINK CAP ...

Page 7: ... OEPPS 6OJU JSDVJU FTDSJQUJPOT 1 JSDVJU FTDSJQUJPOT 5IJT PDVNFOU DBO OPU CF VTFE XJUIPVU 4BNTVOH T BVUIPSJ BUJPO 4 14 1 35 003 0 530 30 3044 1 35 003 5 1 3 563 4 403 1 1 35 6 3 1 35 46 1 0 503 41 1 35 45 1 0503 0 6 1 35 ...

Page 8: ...Samsung Electronics 9 2 Circuit Descriptions Circuit Descriptions 9 1 2 Outdoor Unit ...

Page 9: ...3FGSJHFSBUJOH ZDMF JBHSBN FBU YDIBOHFS WBQPSBUPS FBU YDIBOHFS POEFOTFS 1SPQFMMFS BO SPTT BO XBZ WBMWF XBZ WBMWF XBZ WBMWF BT TJEF JRVJE TJEF PNQSFTTPS OEPPS 6OJU 0VUEPPS 6OJU PPMJOH FBUJOH BT FBL IFDL 1PJOU YQBOTJPO WBMWF ...

Page 10: ...Samsung Electronics 3 1 3 Disassembly and Reassembly Necessary Tools Item Remark SCREW DRIVER MONKEY SPANNER ...

Page 11: ...wer supply 2 Open the FRONT GRILLE and pull out from the PANEL FRONT 3 Detach COVER TERMINAL from the PANEL FRONT use Screw Driver 4 Loosen connector wire white and detach the temperature sensor wire 5 To detach the FRONT PANEL the main frame unfasten 2 screw at the bottom use Screw Driver 6 Take off the FRONT PANEL lifting up the bottom ...

Page 12: ...n frame 2 To detach TRAY DRAIN from the main frame pull the bottom of the TRAY DRAIN towards you 3 CONTROL IN 1 Unfasten the earth screw use Screw Driver 2 Detach the temperature sensor and Humidity sensor 3 Detach COVER CONTROL from the CASE CONTROL 4 Loosen MPI connector wire yellow and MOTOR wires white blue 5 Take off the CASE CONTROL from the main frame ...

Page 13: ...ng Electronics No Parts Procedure Remark 4 PBA 1 Unfasten the screw 2 Cut the cable tie 3 Loosen the terminal block wires Total 4EA N T 2EA 2 TEA 3 TEA Caution The terminal is locking type So when you separate terminals pull pressing the button Button ...

Page 14: ...g button 5 Loosen the Humidity sensor connector CN42 Option connector Caution When you separate the connector pull pressing the locking button 6 Loosen the MPI connector CN81 Option connector Caution When you separate the connector pull pressing the locking button 7 Loosen the Relay 4 blue connector RY71 Caution The terminal is locking type So when you separate terminals pull pressing the button B...

Page 15: ...e terminals pull pressing the button 9 Loosen the Step motor connector Caution When you separate the connector pull pressing the locking button 10 Loosen the Thermistor wire connector CN43 Caution When you take off the PBA don t touch the components Please hold the PBA both side 11 Loosen the Motor connector CN71 Caution When you separate the connector pull pressing the locking button Button ...

Page 16: ...ions and Installation Samsung Electronics 3 7 No Parts Procedure Remark 4 PBA 12 Take off the main PBA from the ASS Y Control in Caution When you take off the PBA don t touch the components Please hold the PBA both side ...

Page 17: ... 8 Samsung Electronics No Parts Procedure Remark 5 EVAPORATOR 1 Unfasten the screw at the right side use Screw Driver 2 Unfasten the screw at the left side use Screw Driver 3 Detach the HOLDER PIPE 4 Take off the EVAPORATOR from the main frame ...

Page 18: ...S FAN 1 Unfasten the screw in the HOLDER EVAP on the left side of evaporator use Screw Driver 2 unfasten the 3 points screws in the CASE CONTROL and then detach the CASE use Screw Driver 3 unfasten the screw a little use Screw Driver 4 Lift up the evaporator slightly and pull the CROSS FAN to the left side ...

Page 19: ...3 10 ３ ...

Page 20: ...3 11 ...

Page 21: ...3 12 ...

Page 22: ...3 13 ...

Page 23: ...3 14 ...

Page 24: ...00A 17 5x6 5mm TP INR14D681KORSY 1 R4204 R4205 2002 001104 R COMPOSITION 12Mohm 5 1 2W AA TP 3 4x9mm 2 R4203 2003 000448 R METAL OXIDE S 100Kohm 5 2W AA TP 4x12mm 1 1 8 0 6 1 P T W 0 1 1 5 m h o 0 0 1 P I H C R 4 7 0 0 0 0 7 0 0 2 6 0 2 4 R 3 8 0 6 1 P T W 0 1 1 5 m h o 0 3 3 P I H C R 6 7 0 0 0 0 7 0 0 2 6 0 1 2 R 4 0 1 2 R 2 0 1 2 R 1 8 0 6 1 P T W 0 1 1 5 m h o 0 7 4 P I H C R 7 7 0 0 0 0 7 0 0...

Page 25: ...C AL 470uF 20 25V GP TP 85 10x12 5mm 5mm 1 CE4204 2401 000151 C AL 1000uF 20 25V GP TP 85 10x20 5mm 1 CE6101 2401 002094 C AL 47uF 20 25V GP TP 85 5x11 2 5mm 1 CE4201 CE4202 2401 004330 C AL 22μF 20 500V TP 12 5X25 7 5mm 2 L4201 2702 001118 INDUCTOR RADIAL 5000uH 10 8 0x11 0mm 1 X0101 2802 001179 RESONATOR CERAMIC 4MHZ 0 5 BK 8X3X5 5MM 1 1 Z H K 2 B D 5 8 O Z E I P R E Z Z U B 9 2 1 1 0 0 2 0 0 3 ...

Page 26: ...3 ...

Page 27: ...C11 1203 003527 IC PWM CONTROLLER TOP243 DIP 7P 9 83x6 6mm PLASTIC 1 1 R107 2003 000708 R METAL OXIDE S 47ohm 5 1W AA TP 3 3x9mm 1 1 R101 2003 000855 R METAL OXIDE S 47Kohm 5 3W AA TP 6x16mm 1 1 R110 2003 002246 R METAL OXIDE S 620ohm 5 1W AA TP 2 4x6 4mm 1 1 R001 2006 001168 R CEMENT 200ohm 5 10W CB BK 15 7x11 5x34 2mm 1 1 1 1 T N E M E C R Y S S A 5 4 1 1 0 0 6 0 0 2 1 2 4 R R401 R402 R403 R404 ...

Page 28: ...9Kohm 1 1 10W TP 1608 1 1 3 3 5 2 0 5 P T W 2 1 1 m h o K 0 5 1 P I H C R 1 6 2 8 0 0 7 0 0 2 8 1 1 R 7 1 1 R 6 1 1 R C307 C308 C309 C310 2201 000154 C CERAMIC DISC 10NF 80 20 2KV Y5P TP 20X5MM 7 5 4 4 C105 C106 2201 000322 C CERAMIC DISC 2 2NF 10 2KV Y5P TP 13X5MM 10 2 2 C903 2201 000322 C CERAMIC DISC 2 2NF 10 2KV Y5P TP 13X5MM 10 1 0 C411 C412 C413 C414 C415 C416 2203 000125 C CER CHIP 1 2nF 10...

Page 29: ...m 2 93x1 3mm 1 0 PT02 DB26 00075A TRANS PULSE PT_50 MH080FXEA4 10 65 5 8 14 EI2218 1 1 IC451 IC452 DB32 00173A S E N S O R M A G C T S E N S O R A S C 7 1 2 5 H P INVERTER 40 150 2 2 1 1 B C P A 8 7 7 0 0 1 4 B D N I A M B C P IC01 DB91 00532E XSA OUTDOOR Inv Micom MN103SFA7K 80P ROM Size 256K bytes 0 1 IC01 DB09 00517A IC MICOM MN103FA7K 80P 5V 10 MHz Flash Memory 0 1 IC01 DB91 00744A OUTDOOR Inv...

Page 30: ... I K 8 1 C E P S _ C S E D E D O C n o i t a c o l n g i s e D LED1 DB98 16601A ASSY LED RED 1 1 LED3 DB98 16602A ASSY LED YEL 1 1 CN51 DB98 22298A ASSY HOOK WHT INVERTER SMAW250A 04 RED 1 1 CN50 DB98 22299A ASSY HOOK WHT INVERTER SMAW250A 04 WHT 1 1 CN30 DB98 24921A ASSY CONNECTOR AS WB670X SMAW250A 06 WHT 1 1 ...

Page 31: ... C007 2301 001577 C FILM LEAD PPF 1 1 C003 2301 001577 C FILM LEAD PPF 1 1 L N 3712 001139 CONNECTOR TERMINAL 2 2 FUSE 3601 001381 FUSE CARTRIDGE 0 0 FUSE 3601 001159 FUSE CARTRIDGE 0 0 0 0 P I L C E S U F 8 3 0 1 0 0 2 0 6 3 P I L C E S U F 0 1 R O T S I S O P 3 9 0 1 0 0 5 1 7 4 A S D 1 0 R O T S I S O P A 6 1 0 0 0 7 4 B D A S D FT00 FT01 DB27 00040A COIL CHOKE 2 2 PCB DB41 00724A PCB OUTDOOR E...

Page 32: ...9 ...

Page 33: ...Operating Instructions and Installation Samsung Electronics 5 1 5 Exploded Views and Parts List 5 1 Indoor Unit Exploded Views and Parts List 8 1 ...

Page 34: ... 6 DB90 04301D ASSY COVER DISPLAY ASSY 1 1 SA 3 7 DB64 02129E GRILLE AIR INLET HIPS 1 1 SA 3 8 DB64 02130A DECO GRILLE HIPS 1 1 SA 3 9 DB93 07043B ASSY DISPLAY ASSY 1 1 SA 4 DB93 06998D ASSY CONTROL IN ASSY 1 1 SA 5 DB90 04703A ASSY COVER CONTROL IN T0 5 1 1 SA 6 DB94 01925A ASSY TRAY DRAIN ASSY 1 1 SA 6 1 DB63 01071A TRAY DRAIN ABS 1 1 SA 6 2 DB61 03660A BLADE V A S 2 2 P P 6 3 DB61 03661A BLADE ...

Page 35: ...21 ...

Page 36: ...E H W E R C S A 8 2 0 0 3 0 6 B D 2 8 1 A N S 1 1 M D P E T E K S A G A 7 1 8 0 0 3 6 B D 3 8 1 A N S 1 1 5 1 F G T B P L A N I M R E T R E V O C A 6 1 8 0 0 3 6 B D 4 8 1 A N S 1 1 5 M E N I H C A M W E R C S 2 4 1 1 0 0 1 2 0 6 5 8 1 19 DB96 11299A ASS Y VALVE 4WAY ASS Y 1 SA DB96 08939C 1 A N S 1 1 A U H N A S A 0 1 4 R E V L A V Y A W 4 A 8 3 3 2 0 2 6 B D 1 9 1 A N S 1 1 Y S S A L I O C D I O...

Page 37: ...LAMP ABS BLK V21 PJ 1 SNA 4 DB91 00309A SCREW PH M3 L25 1 SNA 5 DB97 02418A SCREW TH M4 L10 2 SNA 6 DB95 01113F ASS Y THERMISTOR 3 BLK SMH200 WHT 1 SA 7 DB65 00004U TERMINAL BLOCK 1 L 2 N F1 F2 1 SNA A N S 1 P 5 R E V U O L W C Y S S A A 8 8 6 4 0 3 9 B D 8 9 DB65 10088D CABLE TIE NYLON66 2 SNA 10 DB93 07171A C W 485 COMM RED BLUE 1 SNA 11 DB93 04695B C W M P I 100mm 1 SNA 12 DB95 01703A ASSY HUMI...

Page 38: ...0 02 4BNTVOH MFDUSPOJDT ...

Page 39: ...Samsung Electronics 5 7 5 4 Ass y Control Out AQV18E DB93 07025M AQV24E DB93 07025N ...

Page 40: ...DB62 04566B INSULATION CONTROL BOX TOP 1 1 SNA A N S 1 0 K N I S T A E H A 5 1 3 5 0 2 6 B D A S 0 1 K N I S T A E H A 3 0 1 6 0 2 6 B D A N S 1 1 A C I M R O T A L U S N I Y S S A A 0 2 3 5 0 2 6 B D A N S 1 2 E I T E L B A C D 8 8 0 0 1 5 6 B D A N S 1 0 R E B B U R A 9 4 4 0 0 3 7 B D A N S 2 2 E N I H C A M W E R C S Y S S A A 6 0 3 0 0 1 9 B D A N S 5 5 E N I H C A M W E R C S Y S S A A 7 0 3...

Page 41: ...1 2 CN72 FAN MOTOR 3 CN22 COMMUNICATION 4 CN46 DOWNLOAD 5 CN43 TEMPERATURE SENSOR 6 CN91 DISPLAY 7 CN44 FAN MOTOR FEEDBACK 8 CN63 BLADE MOTOR 9 CN6601 MPI FEEDBACK CN42 HUMIDITY SENSOR 6 7 5 4 3 2 8 9 1 ...

Page 42: ...s 10 1 2 Indoor Display PCB CN01 DISPLAY 1 DIO 2 CLK 3 STB 4 IRQ 5 GND 6 Vcc 7 Remocon Signal Output 8 MPI Display Control 10 1 3 Indoor MPI DISPLAY PCB MPI DISPLAY CONNECTION 1 MPI Lamp driving signal 2 Null 3 Vcc 10 2 ...

Page 43: ...10 3 Samsung Electronics 10 1 4 Indoor EMI PCB 1 POWER N WIRE 2 POWER L WIRE 3 EARTH WIRE 4 POWER N WIRE 5 POWER L WIRE ...

Page 44: ...10 4 ...

Page 45: ... It protects the danger of fire such as tracking and short Tighten tightly the service valve of outdoor unit and the cap of charging valve with a monkey spanner Check the assembly status of parts after repairing the break down It should be same as the status before repairing 1 2 Precautions for the Static Electricity and PL As the PCB power terminal has a weakness for the static electricity pay at...

Page 46: ...ere is a danger of electric shock or fire Do not use multi socket There is a danger of electric shock or fire Ground the product if necessary Be sure to ground the product if there is any danger of electric leakage due to water or moisture Be sure to turn off the auxiliary power switch or pull out the power plug during replacement or repair of electric parts There is a danger of electric shock In ...

Page 47: ...rom the green tea is contained in the filter and deactivates captured bacteria and unpleasant odors Silver Nano Evaporator Deodorizing Filter Activated carbon is incorporated in the filter efficiently absorbing cigarette smoke pet odors and other unpleasant smells replacing them with clean refreshing air Mode The Micro Plasma Ion mode creates strong purified zone in your room 2 1 1 The Feature of ...

Page 48: ...and characteristic New model New model AQV18EWAN AQV18UGAN AQV24EWAN AQV24UGAN Indoor Indoor Design changed Front Display changed Outdoor chassis changed 2 1 3 New components to be applied Part New contents and characteristic Image Indoor mpi optionable mpi lamp optionable HUMIDITY SENSOR optionable ...

Page 49: ...5 X 298 X 222 880 X 638 X 310 1065 X 298 X 222 880 X 638 X 310 0 2 5 0 3 1 0 6 4 0 3 1 g k t e N t h g i e W Refrigerant Pipe 5 x 5 3 6 Φ 5 x 5 3 6 Φ m L x m m d i u q i L 5 x 8 8 5 1 Φ 5 x 0 7 2 1 Φ m L x m m s a G m m L x D e s o H n i a r D Compressor W E A U F 0 6 2 T 8 G y r a t o R G4T150FUAEQ y r a t o R e p y T Motor c i t e m r e H c i t e m r e H e p y T W 4 5 4 2 W 4 2 3 1 t u p t u O d...

Page 50: ...re d aria per ambienti ad unitˆ Separate Aparelho de ar condicionado tipo Split Climatiseur de type sŽparŽ Geteilte raumklimaanlage User s Manual DB98 29980A 1 OWNER S INSTRUCTIONS MANUAL DE INSTRUCCIONES ISTRUZIONI PER L USO MANUAL DE INSTRU ÍES MANUEL D UTILISATION GEBRAUCHSANWEISUNG Splut type Room Air Conditioner Aire acondicionado domŽstico sistema Split Condizionatore d aria per ambienti ad ...

Page 51: ...e deviation Only for XAP XAX GEM Buyer e h t e s U Indoor N Outdoor X Use the digit for KD models CKD 1 SKD 2 Product Division AS Cooling Only AQ Heat Pump Capacity 09 9 000 Btu 12 12 000 Btu 18 18 000 Btu 24 24 000 Btu 30 30 000 Btu 36 36 000 Btu Inverter V Inverter None Non Inverter B BIG F Forte G GP H HB J WW Premium L Forte Deluxe M Moderato P Presto V Vivace W WW X Forte Extreme Z Tsar Versi...

Page 52: ...es on testing cooling mode during more than 10 minutes Indoor Temp Variation 20 C 32 C Outdoor Temp Variation 5 C 45 C 6 7 8 9 10 11 12 10 20 30 40 Outdoor Temperature s P G 6 7 8 9 10 11 12 10 20 30 40 Outdoor Temperature s P G Indoor Temperature 24 21 27 29 32 Indoor Temperature 24 21 27 29 32 Low Refrigerant Pressure Distribution AQV18 AQV24 ...

Page 53: ...１２ ３ 12 3 ...

Page 54: ...１２ ４ 12 4 ...

Page 55: ...12 5 ...

Page 56: ...12 6 ...

Page 57: ...１２ ５ １２ １２ ７ ...

Page 58: ... OPTION OPTION １２ ５ ２ 12 8 １２ ５ ３ ...

Page 59: ...１２ ６ Ｉｎｓｔａｌｌａｔｉｏｎ １２ １２ １２ ９ ...

Page 60: ...１２ ７ １２ ７ １ １２ １０ ...

Page 61: ...１２ ７ ２ １２ １１ ...

Page 62: ...ng Electronics Co Ltd Sep 2008 Code No DB98 29945A 1 GSPN Global Service Partner Network Area Web Site North America http service samsungportal com Latin America http latin samsungportal com CIS http cis samsungportal com Europe http europe samsungportal com China http china samsungportal com Asia http asia samsungportal com Mideast Africa http mea samsungportal com ...

Page 63: ...8 1 Samsung Electronics 8 Schematic Diagram 8 1 Indoor Unit This Document can not be used without Samsung s authorization ...

Page 64: ...8 2 Outdoor Unit This Document can not be used without Samsung s authorization Samsung Electronics 8 2 ...

Page 65: ...t repeatedly Push the button to set the display panel to Every time you push the button the display panel reads repeatedly Push the button to set the display panel to Every time you push the button the display panel reads repeatedly Push the button to Cool Push the button to set the display panel to Every time you push the button the display panel reads repeatedly Push the button to set the displa...

Page 66: ...part shows like below when each time you press Mode button Step 4 Pressing the ON OFF button When pressing the operation ON OFF key with the direction of remote control for unit the sound Ding or Diriring is heard and the OPERATION ICON lamp of the display is flickering at the same time then the input of option is completed If the diriring sound isn t heard try again pressing the ON OFF button Ste...

Page 67: ...Samsung Electronics 4 3 OPTION ITEMS REMOCON MODEL SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 AQV18EWA 2 E 7 7 7 7 5 2 1 C AQV24EWA 3 C 8 7 7 7 5 2 4 D ...

Page 68: ...e Motor Hall IC output connector CN44 on the indoor unit main PCB OFF OFF OFF OFF 4 3 4 no display EEPROM Error OFF OFF OFF OFF no display MPI Feedback Error Check the assembly status of the connector CN6601 Change the Continue Continue Continue OFF 4 3 5 All blink no display Option is erased or wrong option code is input Reset remote control option code OFF OFF OFF OFF 1min Time out Communication...

Page 69: ...U V W COLOR RED BLU YEL When it occur first it operates after 3 minutes When this three times it shows Error Continue 4 3 14 z current sensor error Check short or open in every component around IC451 and IC452 OFF OFF OFF Continue 4 3 15 z DC Link valtage sensor error Measure the resistance R113 R116 OFF OFF OFF Continue 4 3 16 z OTP error Impossible to check EEPROM loading data check Change the P...

Page 70: ...rrectly 2 Isn t the power cable and communication cable error 2 Troubleshooting procedure Yes Restart after power off Is the communication error occurred again Is the communication error occurred again Exchange the Outdoor unit s PBA Terminate the service Is the connection of communication cable normal Correct the wrong cable Terminate the service Yes Yes No No No Exchange the Indoor unit s PBA ...

Page 71: ...r Replace SENSOR Resistance Value 20 C 12 09kΩ 30 C 8 31kΩ 35 C 6 94kΩ 40 C 5 83kΩ No Is the sensor resistance value 10KΩ 3 at the room temperature of 25 C Detach the assembled sensor from the ASS Y PCB CN43 connector and measure the sensor resistance with an ohmmeter tester Below 0 5V Over 4 9V MICOM Error or Connector CN43 check Connect the sensor to CN43 supply power and measure the voltage of ...

Page 72: ... Y Sensor Replace SENSOR Resistance Value 20 C 12 09kΩ 30 C 8 31kΩ 35 C 6 94kΩ 40 C 5 83kΩ No Is the sensor resistance value 10KΩ 3 at the room temperature of 25 C Detach the assembled sensor from the ASS Y PCB CN43 connector and measure the sensor resistance with an ohmmeter tester Below 0 5V Over 4 9V MICOM Error or Connector CN43 check Connect the sensor to CN43 supply power and measure the vol...

Page 73: ...er Check as in the procedure No power parts No Does the OPERATION lamp blink After unplugging out the power cord should be reconnected within 5 seconds Does the Solid State Relay SS71 work properly Test rod location Normal Voltage SS71 SS71 12V Is the supply voltage of the fan motor sufficient Test rod location Normal Voltage PCB CN72 Condition pin 3 and 5 Fan operate About AC 180V PBA should be r...

Page 74: ...PI connector connected correctly in CN6601 2 Troubleshooting procedure Yes Exchange the Ass y Compact MPI No Exchange the PBA No Reassemble the connector No Is it OK Check the connection of CN6601 on the PBA Is the voltage between Pin 3 and GND DC11 12V Is the voltage between Pin 4 and GND DC11 12V Yes Exchange the PBA Yes ...

Page 75: ...h temperature 4 Is the resistance value of sensor connection pull_up correct 2 Troubleshooting procedure Is the sensor connector connected correctly in accordance with a color BLK Is the temperature sensor connected correctly without separation CN51 PIN 1 2 Does the both terminal of sensor satisfy the resistance value in accordance with temperature Refer to the R T TABLE Is the resistance value of...

Page 76: ...Is the sensor connector connected correctly in accordance with a color RED Is the temperature sensor connected correctly without separation Does the both terminal of sensor satisfy the resistance value in accordance with temperature Refer to the R T TABLE CN50 PIN 3 4 Is the resistance value of sensor connection pull_up 18K Reconnect the sensor connector Change the position of sensor Exchange the ...

Page 77: ...the sensor connector connected correctly in accordance with a color SKY BLUE Is the temperature sensor connected correctly without separation Does the both terminal of sensor satisfy the resistance value in accordance with temperature Refer to the R T TABLE CN50 PIN 3 4 Is the resistance value of sensor connection pull_up 24K Reconnect the sensor connector Change the position of sensor Exchange th...

Page 78: ...ing procedure after 30min 1Hr Exchange the Ass y Compact MPI No Terminate the service No Is the dischagre over temperature sensor error appeared again Restart after power off Is the dischagre over temperature sensor error appeared again Yes Exchange the PBA Yes The condition is too poor for airconditioner to operate Wait until discharge temperature is decreased Restart after power off Operate the ...

Page 79: ...IN PBA No Does the fan rotate Restart A C after power off Is the voltage of CN01 3 5 within 1V 5V during the operation Yes PBA problem or MOTOR problem Change the main PBA first and then check the operation No Terminate service No Is the FAN error appeared again Exchange the PBA No Is the voltage of CN01 3 6 within 1V 5V during the operation Yes Reassemble the fan wire and input the power again Ye...

Page 80: ...e resistance of compressor normal 2 Troubleshooting procedure Yes Restart after power off Is the restart error occurred again Is the connection cable for the compressor and power terminal normal Exchange the PCB Terminate the service Is the compressor body and interphase resistance insulated Exchange the compressor Correct the cable connection Yes Yes No No No ...

Page 81: ...he interphase resistance of compressor normal 2 Troubleshooting procedure Restart after power off Is the condition of indoor outdoor temperature normal load Is the position of temperature sensor and the sensing value normal Is the connection cable for the compressor and power terminal normal Exchange the PCB Correct the sensor position or exchange the sensor Correct the cable connection Is the I_T...

Page 82: ...e Restart after power off Is the O C Over Current error occurred Is the compressor body and interphase resistance insulated Is the condition of indoor outdoor temperature normal load Is the position of temperature sensor and the sensing value normal Is the connection cable for the compressor and power terminal normal Exchange the PCB Terminate the service Exchange the Compressor Correct the sensor...

Page 83: ...ons and Installation Samsung Electronics 4 19 4 3 14 Comp Rotation error When is diplayed Replace the wires according to the wiring diagram No Is the connection of Comp wire OK Restart after power off Yes Exchange the PBA ...

Page 84: ... error When is diplayed 1 Checklist 1 IIs there no short or open in every component around IC451 and IC452 2 Troubleshooting procedure Terminate the service No Is the current sensor error appeared again Restart after power off Yes Exchange the PBA ...

Page 85: ...k assembled in accordance the specification Outdoor PBA 3 Are R113 R114 R115 470 Kohm 4 Is R116 14 3Kohm 2 Troubleshooting procedure No Is the voltage of indoor unit terminal block N 1 1 correct after power supply Is the capacitor C101 C102 C103 for DC Link assembled in accordance the specification Apply the troubleshooting for outdoor unit power supply error Exchange the outdoor PBA Exchange the ...

Page 86: ... been there power failure 2 Troubleshooting procedure 4 3 17 OTP error When is diplayed 1 Checklist 1 Check the IC701 s soldering status Is there any open or short 2 Troubleshooting procedure Terminate the service No Is the OTP error appeared again Restart after power off Yes Exchange the PBA Terminate the service No Is the AC line zero cross signal error appeared again Restart after power off Yes...

Page 87: ...s the outdoor unit s temperature over 40 C or under 30 C Cool Mode Is the outdoor unit s temperature under 7 C Yes 4 3 20 capacity miss match error When is diplayed 1 Checklist 1 Check the Btu between indoor unit and outdoor unit 2 Check the indoor unit s option code and outdoor unit s EEPROM data 2 Troubleshooting procedure Exchange the one of them according to the exact model spec No Is the the ...

Page 88: ...edure Yes Terminate the service Exchange the INDOOR PCB Exchange the OUTDOOR PCB Exchange the OUTDOOR PCB Yes Yes Yes No No Yes Terminate the service No Yes Yes Yes Restart after power off Is the DC Link voltage error occurred again Is the front and back terminal voltage of indoor outdoor power relay normal Is the resistance for the detection of DC Link voltage normal Exchange the reactor Is the a...

Page 89: ...s correctly No The remote control signal receiver on the display PBA is wrong Check the display board operate Press the Power Button on the right side of A C indoor unit to operate the air conditioner Unplug the power cord and plug it after 30 seconds Check the indoor unit control board does not operate Check whether 2 wires of power cord are connected correctly to the terminal block and control b...

Page 90: ...edure No No Is the voltage of indoor unit terminal block correct after power input Pull out the power cord and execute the following step after 30 seconds Is the outdoor unit normal Is the outdoor unit normal Is the reactor connected correctly Is the of C102 short Is the R701 resistance of indoor PCB 200Ω Is the indoor unit fuse normal Exchange the fuse Connect the reactor wire Disassemble the PCB...

Page 91: ...bleshooting procedure Yes No Yes Yes Driver IC05 06 ULN2003A is faulty No Micom IC04 is faulty No Normal Yes Check as in the procedure No Power No Is STD lamp blinking Unplug the power cord and plug it after 30 seconds Does operation start when swing button of the remote control unit pushed Voltage at pin 30 34 of micom IC04 change Squarewave Voltage at pin 2 5 of CN61 motor connector change Squar...

Page 92: ...tion and check the voltage of No 3 and No 1 of the main PCB CN45 while operating the remote control When the voltage descends below 3V the assembly module PCB is normal and the main PCB is poor Then replace the main PCB 3 Replace the assembly module PCB because the module PCB is poor if the voltage between No 3 and No 1 of CN45 maintains 5V after the remote control starts operation ...

Page 93: ...l the PCB out of the electronic box Check the PCB fuse 1 Is the fuse disconnected Over current Indoor Fan Motor Short AC Part Pattern Short of the MAIN PCB 2 Supply power If the operating lamp twinkles at this time the above 1 3 have no relation Checking the power voltage 1 Is the DB71 input voltage AC200V AC240V Power Cord is fault Fuse open Wrong Power Cable Wiring AC Part is faulty 2 Is the vol...

Page 94: ...V over 3 Is the input of IC19 8V and the output 5V 4 Recheck after disassembling BLDC FAN Wire Inner short of outdoor PCB Wrong assembly of outdoor PCB BLDC FAN Error 4 Check the condition of indoor outdoor connec tion cable 1 Is the green LED light on once per second 2 Is the indoor outdoor connection able connected in order 3 Is the grounding wire connected to the both of indoor outdoor unit 4 I...

Page 95: ... 12 3 4 Abnormal 0Ω Open or Short Room Fan Motor Measure the resistance between terminals of the connector CN72 with a tester Normal At the normal temperature 10 C 30 C Abnormal 0Ω Open or Short Stepping Motor Measure the resistance between the red wire and each terminal wire with a tester Normal About 300Ω at the normal temperature 20 C 30 C Abnormal 0Ω Open or Short Compare terminal Resistance R...

Page 96: ...4 32 Samsung Electronics MEMO ...

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