Samsung NS035LDXEA Service Manual
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Samsung NS035LDXEA Service Manual

System air conditioner
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AIR CONDITIONER
NS035/052/071LDXEA
NS052/071SDXEA
RC035/052DHXEA
Refer to the service manual in the GSPN(see the rear cover) for the more information.
SYSTEM AIR CONDITIONER
Basic :
Model :
NS035LDXEA RC035DHXEA
NS052LDXEA RC052DHXEA
NS071LDXEA RC071DHXEA
NS052SDXEA RC052DHXEA
NS071SDXEA RC071DHXEA
Model Code :
NS035LDXEA RC035DHXEA
NS052LDXEA RC052DHXEA
NS071LDXEA RC071DHXEA
NS052SDXEA RC052DHXEA
NS071SDXEA RC071DHXEA
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram and Parts List
6. Wiring Diagram
7. Schematic Diagram
8. Reference Sheet
RC071DHXEA
NS070LHXEA&UH070EAV2
DH070EAV1&UH070EAV2
CONTENTS

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  • Page 1 SYSTEM AIR CONDITIONER Basic : NS070LHXEA&UH070EAV2 DH070EAV1&UH070EAV2 Model : NS035LDXEA RC035DHXEA NS052LDXEA RC052DHXEA NS071LDXEA RC071DHXEA NS052SDXEA RC052DHXEA NS071SDXEA RC071DHXEA Model Code : NS035LDXEA RC035DHXEA NS052LDXEA RC052DHXEA NS071LDXEA RC071DHXEA NS052SDXEA RC052DHXEA NS071SDXEA RC071DHXEA AIR CONDITIONER CONTENTS 1. Precautions 2. Product Specifications 3.

  • Page 2: Table Of Contents

    Contents 11. Precautions ............................1-1 Installing the air conditioner ......................1-2 Power supply and circuit breaker ....................1-3 During operation ..........................1-4 Disposing of the unit ........................1-5 Others ..............................12. Product Specifications ....................... 2-1 The Feature of Product ........................2-2 Product Specifications ........................

  • Page 3: Precautions

    An all pole disconnection from the power supply must be incorporated in the fixed wiring with a contact opening of >3mm. Do not extend an electric cord to the air conditioner. The air conditioner must be plugged in after you complete the installation. No Tapping and No Extension Cords Samsung Electronics...

  • Page 4: During Operation

    Never store or load the air conditioner upside down or sideways to prevent the damage to the compressor. Young children or infirm persons should be always supervised when they use the air conditioner. Max current is measured according to IEC standard for safety. Current is measured according to ISO standard for energy efficiency. Samsung Electronics...

  • Page 5: Product Specifications

    It can give the benefit to the installers and aries the reliability of the air conditioner. Long Ambient Operation(In Low Temperature) It can arise the reliability and the capacity of the air conditioner, especially operated in low temperature. Eco-friendly Product(Lead-Free, RoHS, WEEE) Samsung Electronics...
  • Page 6 2-2 Product Specifications Indoor Unit Outdoor Unit Model NS035LDXEA RC035DHXEA Cooling(MIN/STD/MAX) 950/ 3500/ 4000 Heating(MIN/STD/MAX) 720/4000/4600 Dehumidifying ℓ/h Cooling m³/min Air Volume (H/M/L) Heating Cooling Noise (H/M/L) Heating Cooling 2.81 Energy Efficiency Ratio Heating 3.41 Power ph/V/Hz 1/220~240V/50Hz Cooling 210/ 1245/ 1450...

  • Page 7: Product Specifications

    Max. 20 Between Pipe Length Max. 30 Heat Exerchanger FP1.3*Slit*Slica FP1.4*G-fin* Hydrofile Refrigerant Control Unit Freezer Oil Capacitor Refrigerant to Change(R410A) 1400 (10g/m) Protection Device(OLP) Cooling Test Condition DB27˚CWB19˚C DB35˚C WB24˚C Heating Test Condition DB20˚C WB15˚C DB7˚C WB6˚C Samsung Electronics...
  • Page 8 Connection Method Flare Height Max.30 Between Pipe Length Max50 Heat Exerchanger FP1.3*Slit*Slica FP1.3*Louver Refrigerant Control Unit Freezer Oil Capacitor Refrigerant to Change(R410A) 1800(25g/m) Protection Device(OLP) Cooling Test Condition DB27˚CWB19˚C DB35˚C WB24˚C Heating Test Condition DB20˚C WB15˚C DB7˚C WB6˚C Samsung Electronics...
  • Page 9 Flare Height Max. 20 Between Pipe Length Max. 30 Heat Exerchanger FP1.3*H-fin*Slica FP1.4*G-fin,*Hydrofile Refrigerant Control Unit Freezer Oil Capacitor Refrigerant to Change(R410A) 1400(10g/m) Protection Device(OLP) Cooling Test Condition DB27˚CWB19˚C DB35˚C WB24˚C Heating Test Condition DB20˚C WB15˚C DB7˚C WB6˚C Samsung Electronics...
  • Page 10 Connection Method Flare Height Max.30 Between Pipe Length Max50 Heat Exerchanger FP1.3*Slit*Slica FP1.3*Louver Refrigerant Control Unit Freezer Oil Capacitor Refrigerant to Change(R410A) 1800(25g/m) Protection Device(OLP) Cooling Test Condition DB27˚CWB19˚C DB35˚C WB24˚C Heating Test Condition DB20˚C WB15˚C DB7˚C WB6˚C Samsung Electronics...

  • Page 11: The Comparative Specifications Of Product

    2-3 The Comparative Specifications of Product Item NS035LDXEA/RC035DHXEA NS035LHXEA/UH035EAV1(Basic) Indoor Unit Design Outdoor Unit Indoor Unit 26.0kg 22.0kg Net Weight Outdoor Unit 33.0kg 50.0kg Indoor Unit 990x199x600 990x199x600 Outer Dimension (WxHtxD) Outdoor Unit 790x548x285 790x548x285 Indoor Unit 40dB 40dB Noise...
  • Page 12 Item NS052LDXEA/RC052DHXEA NS052LHXEA/UH052EAV1(Basic) Indoor Unit Design Outdoor Unit Indoor Unit 26.0kg 26.0kg Net Weight Outdoor Unit 33.0kg 50.0kg Indoor Unit 990x199x600 990x199x600 Outer Dimension (WxHtxD) Outdoor Unit 790x548x285 790x548x285 Indoor Unit 42dB 42dB Noise Outdoor Unit 58dB 58dB Samsung Electronics...
  • Page 13 Item NS071LDXEA/RC071DHXEA NS071LHXEA/UH071EAV2(Basic) Indoor Unit Design Outdoor Unit Indoor Unit 32.0kg 32.0kg Net Weight Outdoor Unit 54.5kg 54.5kg Indoor Unit 1100x600x199 1100x600x199 Outer Dimension (WxHtxD) Outdoor Unit 880x310x798 880x310x798 Indoor Unit 44dB 44dB Noise Outdoor Unit 60dB 60dB Samsung Electronics...
  • Page 14 NS052SDXEA/RC052DHXEA DH052EAV1/UH052EAV1(Basic) Indoor Unit Design Outdoor Unit Indoor Unit 29.5kg 29.5kg Net Weight Outdoor Unit 38.5kg 38.5kg Indoor Unit 900*260*480 900*260*480 Outer Dimension (WxHtxD) Outdoor Unit 790x548x285 790x548x285 Indoor Unit 45dB 45dB Noise Outdoor Unit 58dB 58dB 2-10 Samsung Electronics...
  • Page 15 NS071CDXEA/RC071DHXEA DH070EAV1/UH070EAV2(Basic) Indoor Unit Design Outdoor Unit Indoor Unit 33.0kg 33.0kg Net Weight Outdoor Unit 54.5kg 54.5kg Indoor Unit 1150*480*260 1150*480*260 Outer Dimension (WxHtxD) Outdoor Unit 880*310*798 880*310*798 Indoor Unit 45dB 45dB Noise Outdoor Unit 60dB 60dB Samsung Electronics 2-11...

  • Page 16: Accessory And Specifications

    Installation Manual DB98-32737A Insulation DB62-04318S Insu Drain Hose DB62-11028A Indoor Unit DB62-11208E Insu Hose DB62-11208D Cable Tie DB65-10088C Grommet Hanger DB63-00237A Ass'y Drain Hose Joint DB94-03287A DB73-20134A RUBBER LEG Outdoor unit DB67-20011A DRAIN PLUG DB98-34367A INSTALLATION MANUAL 2-12 Samsung Electronics...

  • Page 17: Disassembly And Reassembly

    3. Disassembly and Reassembly Necessary Tools Item Remark +SCREW DRIVER MONKEY SPANNER Samsung Electronics...

  • Page 18: Indoor Unit

    Stop operation of the air conditioner and remove the power cord before repairing the unit. NS035/052/071LDXEA Parts Procedure Remark Filter 1) Pull out the Filter as picture 1 or picture 2. 2) If it is necessary, after disassembling 8 indicating screws, detach the Bracket Filter. Samsung Electronics...
  • Page 19 Blower 1) After disassembling 13 indicating screws, & detach Ass’y Cabinet-Top Motor. Motor 2) After disassembling 3 indicating screws, detach Ass’y Case Blower Upper. – Press the pothook of the Case Blower and detach Ass’y Case Blower Upper. Samsung Electronics...
  • Page 20 Cover Control. 4) Detach the Motor Wire Connected to PCB and Capacitor. 5) After disassembling the indicating screws, detach the wire connected to the Partition. 6) After disassembling 2 indicating screws, detach the Ass’y Band Motor. Samsung Electronics...
  • Page 21 Blowers from the axis of the Motor by 3mm inner hexagon spanner. Drain Pan 1) After disassembling 15 indicating screws, detach Ass’y Cabinet-Top Evap. 2) After disassembling 6 indicating screws, detach the Bracket Outlet. 3) Detach the Drain Pan. Samsung Electronics...
  • Page 22 1) After disassembling 2 indicating screws, detach Ass'y Cover Pipe. 2) Detach the Sensor from the Control Box.(including 2 Sensors) 3) After disassembling 2 indicating screws, detach Ass'y Support Evap LF. 4) After disassembling 2 indicating screws, detach Ass'y Support Evap RH. Samsung Electronics...
  • Page 23 Pothook and detach the PCB from the set. 3) If only the disassembly of Capacitor is required, detach it from the set. 4) If only the disassembly of Case Control is required, detach it from the set after disassembling 2 indicating screws. Samsung Electronics...
  • Page 24 Parts Procedure Remark 5) Detach the Transformer after disassembling 2 indicating screws. Work is possible after disassembling the Case PCB. Ass’y Bracket 1) After disassembling 16 indicating screws, Outlet detach Ass’y Bracket Outlet. Samsung Electronics...
  • Page 25 Blower & Motor screws, detach Ass'y Cabi Bottom Blower. 2) Detach from Ass'y Control In the capacitor connection wire between the Motor Fan and housing connector. 3) After disassembling 2 places indicating screws, detach the 2 Fan Case. Samsung Electronics...
  • Page 26 4) After disassembling 2 places indicating screws, detach Fan Motor and Blower from the set. 1) After disassembling 1 Indicating screw, Control In detach the Cover control. 2) Detach the Motor-Fan and Sensor Connector from the PCB. 3-10 Samsung Electronics...
  • Page 27 Procedure Remark 3) Disassemble 4 indicating screws and detach Control In from the set. Drain Pan Work is possible when Disassembling the Ass'y Cabi Bottom Blower. 1) Disassemble 7 indicating screws and detach Ass'y Cabi Bottom Drain. Samsung Electronics 3-11...
  • Page 28 2) Disassemble 4 indicating screws and detach the Drain Pan. (2 screws each at left and right side) Work is possible when Disassembling the Evap Ass'y Drain Pan. 1) Disassemble 5 indicating screws to detach Cover Pipe. 3-12 Samsung Electronics...
  • Page 29 Procedure Remark 2) Disassemble Sensor on the Evap. 3) Disassemble 4 indicating screws which are in the near of Hanger Plate to detach the Evap. (2 screws each at left and right side) It needs 2 peoples. Samsung Electronics 3-13...

  • Page 30: Outdoor Unit

    3-2 Outdoor Unit RC071DHXEA Parts Procedure Remark Common Work 1) Loosen 1 fixing screw of the Cover-Control and detach the Cover Control. 2) Loosen each 7 fixing screws and detach the Cabinet Upper. 3-14 Samsung Electronics...
  • Page 31 Parts Procedure Remark 3) Loosen 2 screws fixed to assemble Control Box with Cabinet-Side RH. 4) Loosen fixing screws and detach the Cabinet-Side RH. 5) Loosen 2 screws fixed on the Guide Condenser. Samsung Electronics 3-15...
  • Page 32 Parts Procedure Remark 6) Loosen fixing screws of the Cabinet Front. 3-16 Samsung Electronics...
  • Page 33 2) Loosen fixing screw on both sides. 3) Disassemble the pipes in both inlet and outlet with welding torch. 4) Detach the Heat Exchanger. 5) Loosen 4 bolts fixed to assemble Valve Service with Bracket Valve like the picture on the right side. Samsung Electronics 3-17...
  • Page 34 2) Detach the Fan Propeller. 3) Loosen 4 fixing screws to detach the Motor. 4) Disconnect the wire between ASS'Y Control Out and Motor. 5) Loosen 2 fixing bolts and detach the Bracket Motor. 3-18 Samsung Electronics...
  • Page 35 Procedure Remark Compressor 1) Loosen the fixing nut and detach the Compressor Lead Wire. 2) Disassemble the Felt Compressor Sound. 3) Loosen the 3 bolts at the bottom of Compressor like the picture on the right side. Samsung Electronics 3-19...
  • Page 36 1) loosen 1 pcs screw of cover control,and detach it. 2) loosen 5 pcs screws on both right and left cabniet side edges and to detach the cover-top 3) Loosen 7 screwsfixed to disassemble cabi-front , and detach it. 3-20 Samsung Electronics...
  • Page 37 Parts Procedure Remark common work 4) loosen 7 screws to disassemble the cabi- right ,and detach it. 5) loosen 2 screws to disassemble steel-bar. 6) loosen 3 screws to disassemble cabi-left. Samsung Electronics 3-21...
  • Page 38 Remark fan&motor 1) loosen 1 screw as indication and detached the fan. 2) loosen 4 pcs motor screws and disconnect the wire betwwen assy control out and motor. 3) loosen 2 pcs bracket-motor screw and detach it. 3-22 Samsung Electronics...
  • Page 39 Heat exchanger 1) Release the refrigerant at first 2) Looosen fixing screw on both side. 3) disaessembly the pipes in both inlet and outlet with welding torch. 4) detach the heat exchanger. Samsung Electronics 3-23...
  • Page 40 Parts Procedure Remark compressor 1) disconnect the compressor lead wire . 2)disassembly the felt comp sound. loosen the 3 bolts at the bottom of 3-24 Samsung Electronics...

  • Page 41: Troubleshooting

    6. Compressor down due to 6'th detection of freezing Detection of the float switch Error of setting option switches for optional accessories EEPROM option error Flickering, If you turn off the air conditioner when the LED is flickering, the LED is also turned off. Samsung Electronics...
  • Page 42 Outdoor Fan 2 Error Discharge over temperature Outdoor Unit Protetion Control Error [Inverter] Compressor starting error Primary Current Over Trip error [Inverter]IPM Over Current(O.C) [Inverter] Compressor Rotation error [Inverter] Current Sensor error [Inverter] DC LINK Sensor error [Inverter] EEPROM Read/Write Error Samsung Electronics...
  • Page 43 Outdoor unit Capacity Setup option error Wired remote control error Communication error between Indoor unit and wired remote control Communication error between Master and Slave wired remote control COM1/COM2 Cross-installed error Error of setting option for wired remote control COM2 Samsung Electronics...

  • Page 44: Outdoor Unit Error Display

    PFC Overload Error Check Outdoor Inverter PBA E500 IPM is over heated. Check Outdoor Inverter PBA E554 GAS Leak error Check indoor and outdoor unit model E556 Capacity miss match between indoor and outdoor Check indoor and outdoor unit model Samsung Electronics...

  • Page 45: Setting Option Setup Method

    . . . repeatedly. Setting is not required if you must a value which has a default. Push the button to set the display panel to Every time you push the button, the display panel reads . . . repeatedly. Samsung Electronics...
  • Page 46 If all lamps of indoor unit are flickering, Plug out, plug in power plug again and press ON/OFF key to retry. If the unit is not working properly or all lamps are continuously flickering after setting the option code, see if the correct option code is set up for its model. Samsung Electronics...
  • Page 47 Step 3 Method) Input the second digit of option code by pressing the High Temp button. example) 021E311422852A311439421F Result) If 2 is displayed, go to the step 4 (whenever pressing the button, 1~9, A,B,C,D,E,F are lit in order.) Samsung Electronics...
  • Page 48 High Fan button. example) 021E311422852A311439421F Result) If E displays, go to step 6. Step 6 Method) Input the fifth digit of option code by pressing the On Timer button. example) 021E311422852A311439421F Result) If 3 displays, go to step 7. SEG5 Samsung Electronics...
  • Page 49 So go to step 9. of 2~7 steps, press the mode button repeatedly to make the first digit 0. Step 9 Method) Input the eighth digit by pressing the High Temp button. example) 021E311422852A311439421F Result) If 4 displays, go to step 10. Samsung Electronics...
  • Page 50 Input the tenth digit by pressing the High Fan button. example) 021E311422852A311439421F Result) If 2 displays, go to step 12. Step 12 Method) Input the 11st digit by pressing the On Timer button. example) 021E311422852A311439421F Result) If 8 displays, go to step 13. 4-10 Samsung Electronics...
  • Page 51 Option code will be input.(Check the option code correctly. At the time, if the same error continues to occur, the option code is out of input range. Check the option code again and repeat the step 1~14. Samsung Electronics 4-11...
  • Page 52 Input the 15th digit by pressing the Low Temp button. example) 021E311422852A311439421F Result) If 3 displays, go to step 17. Step 17 Method) Input the 16th digit by pressing the High Fan button. example) 021E311422852A311439421F Result) If 1 displays, go to step 18. 4-12 Samsung Electronics...
  • Page 53 After completion up to step 20, pressing Mode button. Previous steps are saved internally. If the first number is 3 of the time, it is correct. so go to step 22. mode button repeatedly to make the first digit to with digit. Samsung Electronics 4-13...
  • Page 54 Input the 21th digit by pressing the Low Temp button. example) 021E311422852A311439421F Result) If 4 displays, go to step 23. Step 23 Method) Input the 22th digit by pressing the High Fan button. example) 021E311422852A311439421F Result) If 2 displays, go to step 24. 4-14 Samsung Electronics...
  • Page 55 Option code will be input.(Check the option code correctly. At the time, if the same error continues to occur, the option code is out of input range. Check the option code again and repeat the step 1~26. Samsung Electronics 4-15...
  • Page 56 Option code will be input.(Check the option code rear side correctly. At the time, if the same error continues to occur, the option code is out of input range. Check the option code again and repeat the step 1~26. 4-16 Samsung Electronics...

  • Page 57: Setting An Indoor Unit Address And Installation Option

    SEG 16, 17 SEG 18, 20 SEG 21, 22 SEG23, 24. On(SEG1~12) Off(SEG13~24) SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 Samsung Electronics 4-17...
  • Page 58 Press Mode button to be changed to AUTO mode in the OFF status. 11. Setting SEG14, SEG15 option Press Low Fan button( ) to enter SEG14 value. Press High Fan button( ) to enter SEG15 value. Each time you press the button, will be selected in rotation. SEG14 SEG15 4-18 Samsung Electronics...
  • Page 59 Step 5. Check operation 1. Reset the indoor unit by pressing the RESET button of indoor unit or outdoor unit. 2. Take the batteries out of the remote controller and insert them again and then press the operation button. Samsung Electronics 4-19...
  • Page 60 Example) If you want to set as "MAIN : 3, CHANNEL : 1, RMC : B", SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 assign option codes except SEG 1, 7 which are page options. 4-20 Samsung Electronics...
  • Page 61 Indication Details Indication Details Indication Details Indication Details Indication Details Indication Details Thermo Disuse Disuse Use of buzzer 1000 Hour Indication ON/OFF Details Control Operation Non use 2000 of buzzer Hour Control Samsung Electronics 4-21...
  • Page 62 SEG4 SEG5 SEG6 The option The tens’ digit of The unit digit of The changed Explanation PAGE MODE mode you want an option SEG an option SEG value to change you will change you will change Indication 4-22 Samsung Electronics...

  • Page 63: Option Items

    OPTION ITEMS Model Option Code 011014-1963A2-27343C-370010 NS052SDXEA 020000-100000-200000-300000 03443D-103F44-2443D3-3F4400 NS071SDXEA 014077-1660C8-274750-370000 011037-1361DB-272328-370010 NS035LDXEA 020000-100000-200000-300000 034F46-104C52-24F464-3C5200 011014-1563E6-27343C-370010 NS052LDXEA 020000-100000-200000-300000 034644-104049-246444-304900 NS071LDXEA 014077-1560D9-274750-370000 If you are going to use up to SEG 24, please refer to following instruction. SEG 17 : 0 1: Using high ceiling kit for 4way.

  • Page 64: Items To Be Checked First

    The compressor operates in a reverse cycle to remove Indoor fan and outdoor fan stop operation intermittently exterior ice in a HEAT mode, and indoor fan and outdoor in a HEAT mode. fan do not operate intermittently for within 20% of the total heater operation 4-24 Samsung Electronics...

  • Page 65: Fault Diagnosis By Symptom

    Wrong setting Check DIP SW in the Set DIP SW correctly wired remote controller. Correct Is there any error display on Check each item according to error code list the wired remote controller Check the setting temperature Samsung Electronics 4-25...

  • Page 66: The Outdoor Unit Power Supply Error

    #1 and #3 Are wire and socket connected correctly? CN05,06,07 TAB terminal(EMI PCB), Check and correct the wiring Error 469 display Error 469 display CN20(INVERTER PCB) (Table No.19) (Table No.19) Check the M/C 4-26 Samsung Electronics...
  • Page 67 Is the Pin voltage #6 - #3 of CN40 and 41 changed high(4-5V) and low(0-1V) in case of Exchange INVERTER PCB making manual rotation slowly? Is the Pin voltage #7 - #3 of CN40 and Exchange the FAN motor 41 low(0-1V) in normal rotation? Exchange INVERTER PCB Samsung Electronics 4-27...
  • Page 68 Does the compressor rotate normally? Exchange the compressor Are the service valves full opened? Open valve screw to the end. Is AC power voltage normal during the Check AC power source compressor in operation? Exchange INVERTER PCB 4-28 Samsung Electronics...
  • Page 69 4-WAY valve coil error of 4-WAY valve coil. Dose the voltage of AC220V Exchange apply to the connector of 4-WAY the outdoor PCB. valve coil during the operation? Go to the next page 4-WAY valve main body error Samsung Electronics 4-29...

  • Page 70: Heating At Cooling Mode/Cooling At Heating Mode

    Connect the connector. correctly? Check the resistance value Outdoor fan error of outdoor fan. Dose the voltage of DC300V apply to the connector of outdoor Check the motor wire. fan during the operation of outdoor unit? Outdoor PCB error 4-30 Samsung Electronics...

  • Page 71: Outdoor Temperature Sensor Error

    Exchange the sensor. (Refer to the R/T TABLE) Is the resistance value of sensor connection pull_up 18K? Exchange the PCB. Exchange the PCB. Normal operation Exit 400.0 350.0 300.0 250.0 200.0 150.0 100.0 50.0 Samsung Electronics 4-31...
  • Page 72 Exchange the sensor. (Refer to the R/T TABLE) Is the resistance value of sensor connection pull_up 24K? Exchange the PCB. Exchange the PCB. Normal operation Exit 600.0 500.0 400.0 300.0 200.0 100.0 4-32 Samsung Electronics...

  • Page 73: Coil Temperature Sensor Error

    Exchange the sensor. (Refer to the R/T TABLE) Is the resistance value of sensor connection pull_up 18.2K? Exchange the PCB. Exchange the PCB. Normal operation Exit 400.0 350.0 300.0 250.0 200.0 150.0 100.0 50.0 Samsung Electronics 4-33...

  • Page 74: Fan Error

    4) Is the resistance value of sensor connection pull_up correct? 2. Troubleshooting procedure Remove the Fan lock. Isn't the Fan locked? Is the connector connected correctly? Connect the connector. Is the color of Fan wire matched correctly? Exchange the Fan. Exchange the PCB. Normal operation Exit 4-34 Samsung Electronics...
  • Page 75 1) Is the connection of R, S, T power wire normal? 2) Are Relay RY21 and R200 on the INVERTER PCB mounted normally? 2. Troubleshooting procedure Are connection of the wire from INVERTER PBA to Check and correct the wire connection EMI PBA normal? Exchange INVERTER PCB Samsung Electronics 4-35...
  • Page 76 Is insuration resistance between each Exchange the compressor compressor terminal and body normal? Does the compressor rotate normally? Exchange the compressor Did AC power voltage interruption happen Check AC power source during the compressor in operation? Exchange INVERTER PCB 4-36 Samsung Electronics...

  • Page 77: Communication Error

    Is the communication error Terminate the service. occurred again? Isn't the power cable and Correct the wrong wiring. communication cable wiring error? Is the connection of Correct the connection of communication cable normal? communication cable. Exchange the outdoor unit PCB. Samsung Electronics 4-37...

  • Page 78: Compressor Start Error

    Exchange the compressor. compressor(u v, v w, w u) normal? Is the compressor body and Exchange the compressor. interphase resistance insulated? Is the connection cable for the Correct the cable connection. compressor and power terminal normal? Exchange the PCB. 4-38 Samsung Electronics...

  • Page 79: Compressor Lock Error

    Exchange the compressor. compressor(u v, v w, w u) normal? Is the compressor body and Exchange the compressor. interphase resistance insulated? Is the connection cable for the Correct the cable connection. compressor and power terminal normal? Exchange the PCB. Samsung Electronics 4-39...
  • Page 80 Is each contact resistance normal? Exchange M/C (less than 0.1ohm) Does the error reappear frequently Exchange INVERTER PCB The cause of this error may be power source trouble as like power interruption. Check the power source. 4-40 Samsung Electronics...

  • Page 81: Pcb Inspection Method

    FAN operation checking 1) Is the FAN motor running? Controller trouble inside of the fan motor Press the ON/OFF button. 2) Is the connection of CN73 normal? connector trouble of CN73 1. FAN Speed[HIGH] 2. FAN mode Samsung Electronics 4-41...

  • Page 82: Outdoor Detailed Inspection Procedure

    D101 upper side pin of '~' marking pins INVERTER PCB 2) Is DC Link voltage 450-510V? Check IGBT module pins marking voltage near C701 Check BLDC fan 1) See 12-2-3 The Outdoor unit Fan error(Fault Diagnosis) 4-42 Samsung Electronics...

  • Page 83: Main Part Inspection Method

    BLUE - BLACK 10KΩ ~ 50KΩ pulse ORANGE - BLACK 10KΩ ~ 50KΩ reverse Abnormal 0Ω...Open or Short Outdoor Unit 4way Valve Solenoid Measure resistance with a multimeter Normal At the normal temperature(10˚C~30˚C) 1.6KΩ 15% Abnormal ,0Ω...Open or Short Samsung Electronics 4-43...

  • Page 84: Pcb Diagram And Parts List

    External Control(Display Part) : SMW250-04(RED) Transformer Out : YW396-03AV(WHT) HALL IC : SMW250-03(BLU) Main Power In : YW396-03AV(BLU) MICOM Download : SMW200-10(WHT) Power : YW396-03AV(BLU) Indoor/Outdoor Communication : YW396-02(RED) Transformer In : SMW250-03(RED) This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 85: Outdoor Main Pcb

    DISPLAY CONNECTOR SMAW250A-03 RED PC DOWNLOADCONNECTOR SMW200-10 BLK S NE T CONNECTOR SMW200-04 NTR AS-PRO DOWNLOAD CONNECTOR SMAW200A-07 WHT DISPLAY CONNE CTORS MW200-05 NTR DOWNLOAD-INV CONNECTOR S MW200-10 RED This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 86: Outdoor Sub Pcb

    5-3 OUTDOOR SUB PCB 12V POWER CONNECTOR YW396-02V BLU MAIN -SUB SIGNAL CONNECTOT SMW250-04 WHT MAIN -SUB SIGNAL CONNECTOT SMW200-15NTR This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 87: Indoor Unit

    6. Wiring Diagram 6-1 Indoor Unit This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 88: Outdoor Unit Circuit Diagram

    6-2 Outdoor Unit Outdoor Unit :RC035DHXEA/ RC052DHXEA This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 89 Outdoor Unit : RC071DHXEA This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 90: Schematic Diagram

    7.Schematic Diagram 7-1 Indoor Unit MAIN PCB This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 91: Outdoor Unit

    7-2 OUTDOOR UNIT PCB 7-2 -1 MAIN PCB (RC071DHXEA) This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 92 7-2 OUTDOOR UNIT PCB 7-2-2 SUB PCB (RC071DHXEA) This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 93 7-2 OUTDOOR UNIT PCB 7-2-3 MAIN PCB (RC035/052DHXEA) This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 94 7-2 OUTDOOR UNIT PCB 7-2-4 SUB PCB (RC035/052DHXEA) This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 95: Refrigerating Cycle Diagram

    You can open the valve by turning the need valve counterclockwise using hex wrench, and it is used for vacuum, gas purging, coolant injection, coolant purging, and indoor-outdoor unit connection. ACCUMULATOR Accumulator prevents the flow of liquid-state coolant into the compressor. (Liquid-state coolant flowing into the com- pressor will overload the compressor.) Samsung Electronics Samsung Electronics...

  • Page 96: Index For Model Name

    Pressure H/P (Premium) 127V, 50Hz CEILING H/P (Deluxe) 380V/60Hz,3Φ CONSOLE CONV H/P (Standard) 460V,60Hz,3Φ H/P (Premium) (7) VERSION Mont Blabc (5)Refrigerant KOREAN VIVACE EXPORT NEO- R410A The Z version is a FORTE(EEV) high-efficiency EEV Mode indoor unit. NEO-FORTE Samsung Electronics...
  • Page 97 China http://china.samsungportal.com © Samsung Electronics Co., Ltd. 2012. This Service Manual is a property of Samsung Electronics Co., Ltd. Printed in China. Any unauthorized use of Manual can be punished under applicable International and/or domestic law. Code No. DB98-33563A-2...

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