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Samsung AF28FVSDA N Series Service Manual
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Samsung AF28FVSDA N Series Service Manual

Samsung AF28FVSDA N Series Service Manual

Floor stand type air conditioner
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AIR CONDITIONER
Refer to the service manual in the GSPN(see the rear cover) for the more information.
FLOOR STAND TYPE AIR CONDITIONER
Model Code :
Indoor Unit :
AF28FVSDASSN
AF28FVZDASSN
KFR-72L/EMS1
KFR-50L/EMS1
AF28FSSDASSN
AF28FSZDASSN
AF27FSSDASSN
AF24FSSDASSN
CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference Sheet
Outdoor Unit :
AF28FVSDASSX
AF28FVZDASSX
KFR-72W/EMS1
KFR-50W/EMS1
AF28FSSDASSX
AF28FSZDASSX
AF27FSSDASSX
AF24FSSDASSX

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Summary of Contents for Samsung AF28FVSDA N Series

  • Page 1 FLOOR STAND TYPE AIR CONDITIONER Model Code : Indoor Unit : Outdoor Unit : AF28FVSDASSN AF28FVSDASSX AF28FVZDASSN AF28FVZDASSX KFR-72L/EMS1 KFR-72W/EMS1 KFR-50L/EMS1 KFR-50W/EMS1 AF28FSSDASSN AF28FSSDASSX AF28FSZDASSN AF28FSZDASSX AF27FSSDASSN AF27FSSDASSX AF24FSSDASSN AF24FSSDASSX AIR CONDITIONER CONTENTS 1. Precautions 2. Product Specifications 3. Disassembly and Reassembly 4.

  • Page 2: Table Of Contents

    Contents 11. Precautions ............................1-1 Precautions for the Service ......................1-2 Precautions for the Static Electricity and PL ................. 1-3 Precautions for the Safety ........................ 1-4 Others ..............................12. Product Specifications ....................... 2-1 The Feature of Product ........................2-1-1 Features ............................
  • Page 3 Contents 4-4-19 Prohibiting cooling and heating maneuvers error ............4-27 ............... 4-4-20 Problematic outdoor unit fan motor error 4-28 4-4-21 Outdoor unit compressor operation error ............... 4-29 4-4-22 Problematic external PBA error ..................4-30 ................4-4-23 Unconnected compressor wire error 4-31 4-4-24 EEPROM error ........................

  • Page 4: Precautions For The Service

    - Release the valve caps on High and Low pressure side. - Use L wrench to close the valve on the high pressure side. - Approximately 2 minutes after, close the valve on the low pressure side. - Stop operation of the air conditioner. - Disconnect the pipes. Samsung Electronics...

  • Page 5: The Feature Of Product

    2-1 The Feature of Product 2-1-1 Features  Samsung Air Solution delivers cool and refreshing at once!  Cool air : The air solution provides an airflow direction control function for supplying airflow directly on hot days and indirectly on cool days to make the indoors cooler and more pleasant.

  • Page 6: Display Features

    Outdoor unit Smart operation sensor operation  Heat pump Defrost Mute speed indicator Virus doctor good'sleep Cleaning Timer Temperature Air conditioner mode operation mode Current operation mode is displayed. Outdoor unit Smart operation sensor operation Samsung Electronics...

  • Page 7: Buttons On Control Part

    Code No. Color Model Name Image ASSY PANEL OUTLET DB92-02699A AF28FVSDADFN TWILIGHT DEEP BRONZE KFR-72L/EMB1 AF28FSSDADFN ASSY PANLE INLET DB92-02701A AF28FVZDAWKN ASSY PANEL OUTLET DB92-02699B KFR-72L/EMA1 KFR-50L/EMA1 AF28FSSDAWKN TWILIGHT WHITE AF28FSZDAWKN AF27FSSDAWKN AF24FSSDAWKN ASSY PANLE INLET DB92-02701B AF28FVSDAWKN Samsung Electronics...
  • Page 8 2500 (Btu/h) Minimum 2100 2100 1500 Regular (T1)2,600 (T3)3,100 (T1)2,600 (T3)3,100 2100 2100 1300 Power Cooling consumption Minimum Regular (T1)12.7 (T3)14.8 (T1)12.7 (T3)14.8 Operation current Minimum Energy consumption efficiency CSPF Class 1 Class 1 Class 1 Samsung Electronics Samsung Electronics...
  • Page 9 LED MOUDULE & SOFTTOUCH Regular refrigerant R-410A Regular(g) 1400g 1400g 2100g 2100g 1350g Additional refrigerant quantity 30g/m 30g/m 30g/m 20g/m 20g/m (over 5m long pipes) Regular pipe length Maximum allowable pipe length Indoor/outdoor unit maximum allowable head Samsung Electronics Samsung Electronics...

  • Page 10: Product Specifications

    (T1)28,000 Regular (T1)28,000 (T3)24,000 (T3)24,000 (T1)28,000 (T3)24,000 * (T1)8.2 Capacity (Btu/h) Minimum Power Regular (T1)2,600 (T3)3,200 (T1)2,600 (T3)3,200 (T1)2,600 (T3)3,200 Cooling consump- tion Minimum Regular (T1)12.2 (T3)15.0 (T1)12.2 (T3)15.0 (T1)12.2 (T3)15.0 Operation current Minimum Energy consumption efficiency CSPF Samsung Electronics...
  • Page 11 LED MOUDULE & LED MOUDULE & Exterior DISPLAY SOFTTOUCH SOFTTOUCH SOFTTOUCH Regular R-410A Regular(g) 2,000g 2,000g 2,000g refrigerant Additional refrigerant quantity 30g/m 30g/m 30g/m (over 5m long pipes) Regular pipe length Maximum allowable pipe length Indoor/outdoor unit maximum allowable head Samsung Electronics...
  • Page 12 Cooling/Heating Inverter Cooling Inverter Cooling/Heating Inverter Cooling/Heating Inverter mode Capacity (T1)7900 for CIS Regular (T1)8300 (T1)7200 (T1)7610 for Chile Power consumption Regular (T1)2625.3 (T1)2400 (T1)2000 Cooling Operation current Regular (T1)12.1 (T1)11.6 (T1)8.9 ※ T1,T3,H1 : CLAMATES CLASS 2-10 Samsung Electronics...
  • Page 13 LED MOUDULE & Exterior DISPLAY SOFTTOUCH SOFTTOUCH SOFTTOUCH Regular R-410A Regular(g) 1,400g 2,000g 2,000g refrigerant Additional refrigerant quantity 30g/m 30g/m 30g/m (over 5m long pipes) Regular pipe length Maximum allowable pipe length Indoor/outdoor unit maximum allowable head Samsung Electronics 2-11...

  • Page 14: Specifications Of Optional Items

    (AF28FVSDAWKNST) For SE ASIA DB68-04033A (AF27FSSDAWKNER) DB68-04035A,DB68-04036A (AF24FSSDAWKNEU) DB68-04516A (AF28FSSDAWKNTK) DB93-11489Z (AFSSFSSDASSN) Remote control DB93-11489Y (KFR-SSL/EMS1) Main power cable (2.5 ㎟) DB39-00767A (8.5m) Indoor/Outdoor unit communication cable (2 lines) DB93-11275A Outdoor Unit (RED/RED 8.5m) CONNECTOR WIRE POWER DB93-12331A 2-12 Samsung Electronics...
  • Page 15 CABLE-TIE DB65-10088C Piping tape-Color : IVORY DB69-01194B (80mm X 15m) Insulation Tape(5m) DB72-30029A INSULATION TUBE DB72-60033B INSTALL PUTTY DB80-00013A ACCESORY BUSHING-PIPE DB81-00422A SLEEVE DB81-01327A Service tube DB81-01328A ASSY HOSE DRAIN DB94-01351F ASSY-PIPE DB96-04578U (1/4"",Φ6.6,L8000) ASSY-PIPE DB96-04578W (5/8"",Φ16.25,L7900) Samsung Electronics 2-13...

  • Page 16: Filter Specifications

    Dust Filter3 DB63-03425A/B ■ 4 season filter Item Descriptions Code No. Remark This is a basic installation at the time 4 season filter DB91-01473C/D/E/F of purchase and may be cleaned with water. 2-14 Samsung Electronics...

  • Page 17: Disassembly And Reassembly

    3. Disassembly and Reassembly  Necessary Tools Item Remarks +Screw Driver -Screw Driver Long-Nose Pliers Monkey Spanner Spanner torque wrench Samsung Electronics...

  • Page 18: Indoor Unit

    Front Please make sure the power is switched off. 1) After switching off the Indoor unit operation, shut off the main power. Ass’y Panel Inlet 1) Pull out the upper part of the Ass’y Panel Inlet to detach. Samsung Electronics...
  • Page 19 Disassembly and Reassembly Parts Procedure Remark 2) Unscrew four fastening screws on the left and right of the Ass’y Support Inlet. 3) Push the Ass'y Support Inlet down to disassembly it. Samsung Electronics...
  • Page 20 Remark Ass'y Cover 1) Unscrew three fastening screws on the Cover Main PCB Main PCB and then lift it up slightly and pull forward to detach. 2) Detach the entire housing connected to the Ass'y Case Main PCB. Samsung Electronics...
  • Page 21 1) Unscrew the four fastening screws on the top of the Ass’y Cover Top. 2) Lift the cover ceiling up by gripping its left side. 3) Disassemble three connectors. Press both hooks at the top of the Ass'y Cover, detach and then pull it up. Samsung Electronics...
  • Page 22 Disassembly and Reassembly Parts Procedure Remark ASS’Y PANEL 1) Lift up the Ass’y Panel Outlet while hooks are OUTLET detached and then pull it forward. Samsung Electronics...
  • Page 23 Disassembly and Reassembly Parts Procedure Remark Ass’y Cover Duct 1) Unscrew two fastening screws on the top of the Ass’y Cover Duct, lift it up and then pull it forward to detach. Samsung Electronics...
  • Page 24 Disassembly and Reassembly Parts Procedure Remark 2) Unscrew three fastening screws on the bottom of the Ass’y Duct Fan. 3) Lift the Ass’y Duct Fan up and pull it forward while the hooks are detached. Samsung Electronics...
  • Page 25 Disassembly and Reassembly Parts Procedure Remark Ass’y EVAP UNIT-AL 1) Unscrew one fastening screw to detach the Ass’y Connector Wire-Earth. 2) Detach the temperature sensor. 3) Unscrew two screws of the ASS’Y EVAP and pull it forward to detach. Samsung Electronics...
  • Page 26 Disassembly and Reassembly Parts Procedure Remark 3-10 Samsung Electronics...
  • Page 27 Disassembly and Reassembly Parts Procedure Remark Ass’y Case Main PCB 1) Unscrew one screw on the bottom of the Ass’y Case Main PCB and pull it to detach Samsung Electronics 3-11...
  • Page 28 Disassembly and Reassembly Parts Procedure Remark Ass’y CABI Body-Up 1) Unscrew four fastening screws at the ASSY CABI BODY-UP and the ASSY CABI BODY-LOW. 2) Push the ASS’Y CABI BODY-UP toward the rear surface to detach. 3-12 Samsung Electronics...
  • Page 29 Motor Fan and the Ass’y Connector Wire Motor. 2) Press the hooks on the Ass’y Frame-Grille and then turn counterclockwise to detach. 3) Unscrew the fastening screw of the Ass’y Fan- Mixed Flow to detach. Samsung Electronics 3-13...
  • Page 30 Disassembly and Reassembly Parts Procedure Remark 4) Unscrew two fastening screws of the Ass’y Frame-Grille to detach the Ass’y Cover Motor. 5) Raise the Motor Fan up to detach. 3-14 Samsung Electronics...
  • Page 31 1) Detach the lighting connector on the rear of the Ass’y Panel Outlet. 2) Unscrew twelve fastening screws on the rear of the Ass’y Panel Outlet. 3) Detach the Ass’y Panel Outlet and Ass’y Panel Grille hook assembly parts. Samsung Electronics 3-15...
  • Page 32 Disassembly and Reassembly Parts Procedure Remark 4) Detach the motor wire connector and disconnect the wire from the bearings. 5) Unscrew one fastening screw on the rear surface of the Ass’y Panel Grille to detach. 3-16 Samsung Electronics...
  • Page 33 7) Unscrew three fastening screws and then detach the cover blade. 8) Unhook the transparent molded material visible on the rear surface and detach the Ass’y Holder (lighting). Samsung Electronics 3-17...
  • Page 34 Disassembly and Reassembly Parts Procedure Remark 9) Unscrew four fastening screws of the assembled blade and then detach it. 10) Detach Gear Pinion B and the Guide Blade. 3-18 Samsung Electronics...
  • Page 35 Disassembly and Reassembly Parts Procedure Remark 11) Unscrew two fastening screws of the motor and then detach it. Samsung Electronics 3-19...
  • Page 36 Ass’y Cover Top 1) Unscrew two fastening screws of the Cover Display and detach it 2) Detach the display connector from the Main PCB. 3) Detach the motor connector at the lower part of the Ass’y Cover Top. 3-20 Samsung Electronics...
  • Page 37 4) Unscrew two fastening screws on the left and right. 5) Unscrew one fastening screw from the PCB and then detach the Ass’y PCB at the cover top. 6) Unscrew two fastening screws from the Ass’y Gear Rack and detach it. Samsung Electronics 3-21...
  • Page 38 8) Detach the gear pinion from the motor and unscrew two fastening screws to detach the motor. 9) Unhook the left and right of the Panel Display and detach it. 10) Unscrew one fastening screw from the Ass’y PCB Network and then detach it. 3-22 Samsung Electronics...

  • Page 39: Outdoor Unit

    Main Power. Ass'y Cabinet 1) Unscrew the 9 fastening screws of the Ass'y- Cabinet Top to detach. (Use +screw driver) Ass’y Cover- 1) Unscrew the fastening screw of the Ass’y Control Cover-Control to detach. (Use +screw driver) Samsung Electronics 3-23...
  • Page 40 Disassembly and Reassembly Parts Procedure Remark ASS’Y CABINET 1) Unscrew the 6 fastening screws of the Ass'y BACK RH Cabinet Back RH to detach. (Use +Screw Driver) 3-24 Samsung Electronics...
  • Page 41 Remark Ass’y Cabinet 1) Unscrew the fastening screw of the case Front RH control out to detach. (Use +Screw Driver) 2) Unscrew the 5 fastening screws of the Ass'y Cabinet Front RH to detach. (Use +Screw Driver) Samsung Electronics 3-25...
  • Page 42 Disassembly and Reassembly Parts Procedure Remark Ass'y 1) Unscrew the 11 fastening screws of the Ass'y Cabinet Front LF Cabinet Front LF . (Use +Screw Driver) 3-26 Samsung Electronics...
  • Page 43 PBA, please do so 30 seconds after removing the power cord. Do not detach or insert the Motor connector while power is being supplied to the PBA. 3) Unscrew the 2 fastening screws of the Ass'y Control Out to detach. (Use +Screw Driver) Samsung Electronics 3-27...
  • Page 44 (Use Monkey Spanner) 1) Unscrew the 4 fastening screws of the Motor Motor to detach. (Use +Screw Driver) 1) Unscrew the 3 fastening screws of the Bracket Bracket Motor Motor to detach. (Use +Screw Driver) 3-28 Samsung Electronics...
  • Page 45 1) Detach the suction pipe and the discharge pipe. Please detach during major repairs (welding points when detaching compressor). 2) Detach the ass'y cond in/out pipe Please detach during major repairs (welding points when detaching compressor). Samsung Electronics 3-29...
  • Page 46 Remark EEV welding 2 welding points for each EEV point 1. Detach the EEV Coil before beginning work. EEV COIL 2. Wrap the EEV head with a wet towel to prevent it from heating up. EEV Head 3-30 Samsung Electronics...

  • Page 47: Troubleshooting

          SEG4 option set-up. Press the button to set it as     … Each time the button is pressed       will be repeatedly selected. Samsung Electronics...
  • Page 48       will be repeatedly selected. SEG10 option set-up. Press the button to set it as     … Each time the button is pressed will be repeatedly selected.       Samsung Electronics...
  • Page 49 22-30-B0-B8-18 AF28FSSDADFN Twilight Deep Bronze Heat Pump 20-32-B2-B8-25 AF28FSSDAWKN Twilight White Heat Pump 20-32-B2-B8-25 AF28FSZDAWKN Twilight White Heat Pump 20-32-B0-B8-25 AF28FVSDAWKN Twilight White Cooling Only 20-22-B0-B8-25 AF27FSSDAWKN Twilight White Heat Pump 20-32-B0-B8-25 AF24FSSDAWKN Twilight White Heat Pump 20-32-B0-B8-25 Samsung Electronics...

  • Page 50: Error Indicator

    Indoor temperature sensor error Indoor EVA In sensor error Indoor EVA Out sensor error Internal fan 1 error Internal fan 2 error Mixed operation error Options error Internal fan 3 error K1 Feedback error Indoor Terminal Block Fuse error Samsung Electronics...

  • Page 51: Outdoor Unit

    AC overvoltage protection ◎ ◎ ● Problematic external controller incoming current sensor error ◎ ● ● Radiator overheating error ● ● ○ Refrigerant leakage error ○ ◎ ● Normal operation ● : On, ○ : Off, ◎ : Blinking Samsung Electronics...

  • Page 52: Items To Verify Before Diagnosis

    Indoor unit with the first Page 4-17 operation operation heating simultaneously operation mode • Enter options Operation Operation Operation Page Did not enter options set-up • Entering KEY not allowed 4-2~4-4 • P lease refer to Measures According Normal Normal Normal K1 Feedback error Page 4-18 to Symptoms operation operation operation Samsung Electronics...
  • Page 53 Problematic EEV-A while running self- Operation Operation Operation • Inspect pipes and SET condition Page 4-26 diagnosis When outside temperature is above/ • I nspect outside air temperature and Operation Operation Operation below operation range allowed for SET installation condition. Check Page 4-27 heating temperature sensor WIRE Samsung Electronics...
  • Page 54 Problematic Outdoor unit controller Operation Operation Operation • Inspect Outdoor unit PBA Page 4-30 internal voltage sensor Operation Operation Operation EEPROM error • EEPROM loading Page 4-32 Problematic Outdoor unit power • I nspect Outdoor unit PBA / Operation Operation Operation Page 4-30 frequency Inspect power line connection Samsung Electronics...
  • Page 55 Operation Operation AC overvoltage protection • Check input voltage Page 4-30 Problematic incoming electric current Operation Operation Operation • Replace Outdoor unit PBA Page 4-30 sensor • Tighten screws Operation Operation Operation Radiator overheating error Page 4-33 • Replace Outdoor unit PBA Operation Operation Operation Refrigerant leakage error • Inspect pipes Page 4-34 Samsung Electronics...

  • Page 56: Troubleshooting By Symptoms

    Even after replacing the indoor unit Main-PBA? Replace Outdoor unit PBA S Equipment claims must be made at a service center for the EEPROM IC. (A new EEPROM IC must be inserted) Please refer to page 4-33 for equipment code. 4-10 Samsung Electronics...

  • Page 57: When Error Code " " Between Main ↔ Panel Is Indicated On The Indoor Temperature Display Area

    DC3V~DC5V? <Measure voltage> Is the connection wire Connect Panel PBA and Main PBA between the main ↔ Panel PBA disconnected Inspect or replace connector wire or loosely connected? Re-inspect connection of main ↔ panel PBA wire Samsung Electronics 4-11...

  • Page 58: When Camera/Network Error Code Is " " Indicated On The Indoor Temperature Display Area

    3 and 4 of CN600 12V? Replace faulty Panel PBA (Camera/network PBA) Does the voltage between numbers 3 and 9, and Faulty camera/network PBA numbers 3 and 10 of CN600 fluctuate between 0V~5V? (Check communications port) Re-inspect after power reset 4-12 Samsung Electronics...

  • Page 59: When Indoor Temperature Sensor Error Code Is " " Indicated On The Indoor

    DC1V~DC4V? <Measure voltage> Is the sensor wire disconnected Replace faulty temperature sensor itself or loosely connected? Replace the Main PBA if the same problem occurs even after re-soldering the micom pin due to the faulty Main PBA Samsung Electronics 4-13...

  • Page 60: Temperature Display Area

    DC1V~DC4V? <Measure voltage> Is the sensor wire disconnected Replace faulty pipe sensor itself or loosely connected? Replace the Main PBA if the same problem occurs even after re-soldering the micom pin due to the faulty Main PBA 4-14 Samsung Electronics...

  • Page 61: When Indoor Fan Motor Error Code(Top) " "/(Middle)" "/Bottom" "Is

    Check for disconnected fuse (FB10), Both “~”,”~” ends of power PBA BD200 NTC or coil (L10) between AC187V~AC253V? <Measure voltage> Is the voltage of the power PBA CE200 electrolytic condenser Replace bridge diode (BD200) between C265V~DC357V? Cont. Samsung Electronics 4-15...
  • Page 62 Is the voltage of PIN #3 and #6 of MAIN PBA CN200/CN201/CN202 DC8V~DC9V? Measurement of Voltage Faulty POWER PBA and MOTOR - Judgement of faulty Trial & Error component ∗At fitst exchange POWER PBA. Neverthelness, faulty continues and exchange the MOTOR. 4-16 Samsung Electronics...

  • Page 63: When Mixed Operation Error Code Is " " Indicated On The Indoor Temperature Display Area

    1) When the operation mode of the problematic Indoor unit does not match that of an Indoor unit already in operation 2) When the indoor period operation mode of multi-products do not match each other 2. Check procedure 1) Inspect the operation modes of each Indoor unit. 2) Match the Indoor unit operation modes to one another. Samsung Electronics 4-17...

  • Page 64: When Zero Filter Feedback Error Code Is " " Indicated

    Are the options set up properly? Is the state of the wire Reconnect wire connection satisfactory? Is there an output of Replace Main PBA DC12V from pins number 1 and 4 of CN60 of the Main PBA? Replace the high-voltage generator itself 4-18 Samsung Electronics...

  • Page 65: When Indoor Unit Terminal Block Fuse Error " " Indicated On The Indoor Temperature Display Area

    1) Detached indoor unit pipe temperature sensor while running outdoor unit 2) Detached indoor unit pipe entrance temperature sensor 3) Detached indoor unit pipe exit temperature sensor 2. Check procedure 1) Inspect indoor unit pipe entrance temperature sensor 2) Inspect indoor unit pipe exit temperature sensor Samsung Electronics 4-19...

  • Page 66: Outdoor Unit Pba Communications Error

    E203? Replace outdoor unit PBA (A new EEPROM ic must be inserted) S equipment claims must be made at a service center for the EEPROM ic. Please refer to page 4-33 for equipment code. 4-20 Samsung Electronics...

  • Page 67: External Out Temperature Sensor Error

    Replace faulty or broken sensor itself 11kΩ~12kΩ? Replace outdoor unit PBA (A new EEPROM ic must be inserted) S equipment claims must be made at a service center for the EEPROM ic. Please refer to page 4-33 for equipment code. Samsung Electronics 4-21...

  • Page 68: External Cond Temperature Sensor Error

    Replace faulty or broken sensor itself 11kΩ~12kΩ? Replace Outdoor unit PBA (A new EEPROM IC must be inserted) S Equipment claims must be made at a service center for the EEPROM IC. Please refer to page 4-33 for equipment code. 4-22 Samsung Electronics...

  • Page 69: Detached External Temperature Sensor Error

    4) Problematic outdoor unit PBA 2. Check procedure 1) Check to see if temperature sensor is attached properly to the sensor holder 2) Check to see if temperature sensor is connected properly to the outdoor unit PBA connector Samsung Electronics 4-23...

  • Page 70: External Discharge Temperature Sensor Error

    Replace faulty or broken sensor itself 220kΩ~240kΩ? Replace outdoor unit PBA (A new EEPROM IC must be inserted) S Equipment claims must be made at a service center for the EEPROM IC. Please refer to page 4-33 for equipment code. 4-24 Samsung Electronics...

  • Page 71: External Olp Temperature Sensor Error

    Replace faulty or broken sensor itself 220kΩ~240kΩ? Replace outdoor unit PBA (A new EEPROM IC must be inserted) S Equipment claims must be made at a service center for the EEPROM IC. Please refer to page 4-33 for equipment code. Samsung Electronics 4-25...

  • Page 72: Indoor Unit • Outdoor Unit Protection Control Detection Related Error

    Outdoor unit display 1. Cause of malfunction 1) When EEV connector is assembled improperly 2) Faulty EEV itself 2. Check procedure 1) Check connection condition of the EEV connector to the outdoor unit PBA 2) Check EEV itself 4-26 Samsung Electronics...

  • Page 73: Prohibiting Cooling And Heating Maneuvers Error

    1. Cause of malfunction 1) Problematic temperature sensor 2) Faulty sensor itself 2. Check procedure 1) Check connection condition of temperature sensor to the outdoor unit PBA 2) Check outside temperature (Prohibiting cooling: under -5°C, prohibiting heating: over 30°C) Samsung Electronics 4-27...

  • Page 74: Problematic Outdoor Unit Fan Motor Error

    S Equipment claims must be made at a service center for the EEPROM ic. (A new EEPROM ic must be inserted) Please refer to page 4-33 for equipment code. Does the same error occur? Replace fan motor 4-28 Samsung Electronics...

  • Page 75: Outdoor Unit Compressor Operation Error

    S Equipment claims must be made at a service center for the EEPROM IC. (A new EEPROM IC must be inserted) Please refer to page 4-33 for equipment code. Does the same error occur? Replace compressor itself Samsung Electronics 4-29...

  • Page 76: Problematic External Pba Error

    ◎(YEL) ◎(GRN) ●(RED) - when E485 1. Cause of malfunction 1) Abnormal incoming power supply (outside of 187~253V) 2) Problematic outdoor unit PBA 2. Check procedure 1) Check to see if input voltage is normal 2) Replace outdoor unit PBA 4-30 Samsung Electronics...

  • Page 77: Unconnected Compressor Wire Error

    S Equipment claims must be made at a service center for the EEPROM ic. (A new EEPROM ic must be inserted) Please refer to page 4-33 for equipment code. Does the same error occur? Replace compressor itself Samsung Electronics 4-31...

  • Page 78: Eeprom Error

    (In this case the claimed EEPROM IC must be inserted) old PBAs with new ones, the claimed EEPROM ic must be used. <EEPROM IC code per model> Outdoor unit model name EEPROM IC code AF28FVSDASSX DB82-01569A AF28FSSDASSX DB82-01650A 4-32 Samsung Electronics...

  • Page 79: Radiator Overheating Error

    Is the fan speed satisfactory? Re-check item E458 Replace ass’y control out (A new EEPROM IC must be inserted) S Equipment claims must be made at a service center for the EEPROM ic. Please refer to page 4-33 for equipment code. Samsung Electronics 4-33...

  • Page 80: Refrigerant Leakage Error

    ●(YEL) ●(GRN) ○(RED) Outdoor unit display 1. Cause of malfunction 1) Faulty tightness of service valve 2) Faulty pipe 2. Check procedure 1) Check tightness of service valve 2) Check whether or not pipe is leaking 3) Replace pipe 4-34 Samsung Electronics...

  • Page 81: When Outdoor Unit Power Does Not Turn On

    PBA electrolytic condenser between Replace bridge diode (bd101) c265v~dc357v? Have the reactor connection wires reactor 1 and reactor 2 been Connect reactor connect wire properly connected to the reactor? Power ok? Replace outdoor unit PBA due to faulty external micom Samsung Electronics 4-35...

  • Page 82: When The Remote Controller Stops Working

    Does the operation run normally? electric fluorescent light Replace faulty remote controller Does another remote controller Work normally? Replace the Panel PBA if the temote controller still does not work after replacing the remote controller module by itself. 4-36 Samsung Electronics...

  • Page 83: When The Touch Buttons Stop Working

    1) Faulty connection or disconnection of Panel touch wire 2) Faulty touch itself 2. Check procedure Start Is the connection condition of the Panel board wire number Reconnect wire CN20 satisfactory? Detach the deck from the door. Replace touch-board (DB93-10995A) Samsung Electronics 4-37...

  • Page 84: Pcb Diagram

    5. PCB Diagram 5-1 PCB Diagram 5-1-1 Ass'y PCB MAin (in) Samsung Electronics...

  • Page 85: Ass'y Pcb Main (Control)

    #2: TXD_485 #3: nTRST #4: TDO #5: TCK #6: TDI #7: TMS #8: TRACE_CLK #9: GND #10: VCC #11: VCC #12: MD0 #13: RESET #14: TRACE_3 #15: F_SCLK #16: F_SDAT #17: GND #18: TRACE_2 #19: TRACE_1 #20: TRACE_0 Samsung Electronics...
  • Page 86 #2 : NC #3 : VCC #3 : DC 12V #3 : Speaker(-) #4 : DISP_TX #4 : PWM1 #5 : DISP_RX #5 : DC 12V #6 : GBL_RST #6 : PWM2 #7 : CAMERA_TX #8 : CAMERA_RX Samsung Electronics...

  • Page 87: Ass'y Pcb Display

    #3 : DC 12V #2 : GND #4 : RESET #4 : GND #3 : VCC #5 : P4.1 #5 : NC #4 : DISP_RX #6 : P4.0 #5 : DISP_TX #6 : GBL_RST #7 : CAMERA_RX #8 : CAMERA_TX Samsung Electronics...

  • Page 88: Ass'y Pcb Power

    #3 : AC Power #3 : DC 5V #3 : GND #4 : NC #4 : NC #4 : DC 15V #5 : GND #5 : GND #5 : BLDC_OVP #6 : BLDC PS #7 : GND #8 : NC Samsung Electronics...

  • Page 89: Ass'y Pcb Sub (Touch)

    PCB Diagram 5-1-5 Ass'y PCB sUB (TOUCH) CN02 - Downloading CN01 ① ② – CONTROL PBA Connection #1. VCC #1. VCC #2. GND #2. TOUCH Transmission signal #3. Downloading #3. TOUCH Reception signal #4. Downloading #4. GND #5. Downloading Samsung Electronics...

  • Page 90: Ass'y Pcb Sub (Light)

    PCB Diagram 5-1-6 Ass'y PCB sUB (LiGHT) CN01 - Lighting ① #1. 12V #2. Lighting Control signal Samsung Electronics...

  • Page 91: Ass'y Pcb Sub-Network

    #2. USB D- [ Wireless LAN Control #3. GND #3. 12V #3. USB D+ [ Wireless LAN Control #4. USB D+ [Bluetooth Control] #4. GND #4. +5V #5. USB D- [Bluetooth Control] #5. NC #6. +5V #7. NC #8. NC Samsung Electronics...

  • Page 92: Ass'y Pcb Main Out

    PCB Diagram 5-1-9. Ass'y PCB MAin OUT Samsung Electronics...
  • Page 93 #REACTOR2 #1 : 4WAY Control Signal #1 : F1 #BLU : U-phase #2 : Not used #2 : F2 #YEL : W-phase #3 : NEAUTRAL CN510-S Net CN201 ⑯ ⑰ ⑱ CN511 (INV) Downloading - Downloading (S-converter) 5-10 Samsung Electronics...
  • Page 94 MEMO Samsung Electronics Samsung Electronics 5-11...

  • Page 95: Wiring Diagram

    Wiring Diagram 6. Wiring Diagram 6-1 All Model Except KFR-50LW/EMA1 This Document can not be used without Samsung’s authorization. Samsung Electronics Samsung Electronics...

  • Page 96: Only Kfr-50Lw/Ema1 Model

    Wiring Diagram 6-2 Only KFR-50LW/EMA1 Model This Document can not be used without Samsung’s authorization. Samsung Electronics Samsung Electronics...

  • Page 97: Reference Sheet

    S: Smart Sensor+Zero Filter+Virus Doctor N: INDOOR NAME F: FAC Z: Zero Filter+Virus Doctor X: PUTDOOR NAME R: RAC V: Virus Doctor F: FAC SET COMBINATION 無 : INDOOR + OUTDOOR S: INDOOR + OUTDOOR + ACCES. Samsung Electronics Samsung Electronics...

  • Page 98: Refrigerating Cycle Diagram

    7-2 Refrigerating Cycle Diagram Outdoor unit F&T Condenser indoor unit heat Air flow exchanger 4Way valve Sensor Compressor Service Valve Service Valve Samsung Electronics...

  • Page 99: Pressure Graph

    7-3 Pressure Graph Pressure Graph (Low Pressure) 11.0 10.5 Indoor temperature, [ ℃] 10.0 Outdoor temperature, [˚C] □ Pressure Table Unit, [kgf/cm Outdoor Temperature, [˚C] 10.0 Samsung Electronics...

  • Page 100: Resistance Graph

    7-4 Resistance Graph UG8T265FXAEW UG8T265FUAEW Comp. Temperatures[˚C] □ BLDC Compressor Comp.Temp. UG8T265FXAEW UG8T265FUAEW 0.39 0.37 0.40 0.38 0.42 0.43 0.41 0.45 0.43 0.46 0.44 0.48 0.46 0.49 0.47 Samsung Electronics...
  • Page 101 China china.samsungportal.com © Samsung Electronics Co. Ltd. September. 2017. This Service Manual is a property of Samsung Electronics Co., Ltd. Printed in Korea. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. Code No. AC-00011E_3...

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