Samsung AC026MNJDKH/EU Service Manual
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Samsung AC026MNJDKH/EU Service Manual

System air conditioner
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See also: Installation Manual
AIR CONDITIONER
AC026MNADKH
AC035MNADKH
AC052MNADKH
AC071MNADKH
AC026MXADKH
AC035MXADKH
Refer to the service manual in the GSPN(see the rear cover) for the more information.
SYSTEM AIR CONDITIONER
Model :
AC052MXADKH
INDOOR UNIT
OUTDOOR UNIT
AC026MXADKH/EU
AC026MNJDKH/EU
AC035MXADKH/EU
AC035MNJDKH/EU
AC052MXADKH/EU
AC052MNJDKH/EU
CONTENTS
1. Precautions
2. Product Specifications
3. Disassembly and Reassembly
4. Troubleshooting
5. PCB Diagram
6. Wiring Diagram
7. Reference Sheet

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  • Page 1 SYSTEM AIR CONDITIONER INDOOR UNIT OUTDOOR UNIT Model : AC026MXADKH/EU AC026MNJDKH/EU AC035MXADKH/EU AC035MNJDKH/EU AC052MXADKH/EU AC052MNJDKH/EU AIR CONDITIONER CONTENTS 1. Precautions 2. Product Specifications AC026MNADKH 3. Disassembly and Reassembly AC035MNADKH AC052MNADKH AC071MNADKH 4. Troubleshooting 5. PCB Diagram 6. Wiring Diagram 7. Reference Sheet...

  • Page 2: Table Of Contents

    4-3-4 Communication error after finishing Tracking ..............4-18 4-3-5 Indoor unit float sensor error ....................4-19 4-3-6 EEPROM circuit failure ......................4-20 4-3-7 Outdoor unit is not powered on ..................4-21 4-4 Troubleshooting by symptoms ..........................4-23 4-4-1 Communication error ......................4-23 Samsung Electronics...
  • Page 3 5-1 Indoor Unit ............................5-2 Outdoor Unit ............................. 16. Wiring Diagram ...................................................... 6-1 Indoor Unit 6-2 Outdoor Unit ............................ 7. Reference Sheet ..........................7-1 Index for Model Name ........................7-2 Refrigerating Cycle Diagram ......................7-3 Pressure Graph ........................... Samsung Electronics...

  • Page 4: Precautions

    ◆ Check whether the installation location is at least two meters away from other electronic products such as TV, video, or audio. – Otherwise, the video quality might be degraded or noise might be generated. ◆ Do not let end users repair the products themselves. – Unauthorized disassembly might cause electric shock or fire. Samsung Electronics...

  • Page 5: Precautions Related To Product Safety

    – Release the high pressure and low pressure valve caps. – Close the high pressure valve completely using an L-wrench – After about two minutes, close the low pressure valve completely. – Stop running the air conditioner. – Separate the connecting pipe. Samsung Electronics...

  • Page 6: Product Specifications

    Floor standing type Air Conditioner, Powerful on floor heating & cooling. ■ VIRUS DOCTOR Zone (Air cleaning solution) Samsung’s Micro Plasma Ion Zone is a technology that generates activated hydrogen and oxygen ions, which exterminates viruses and allergy-causing microbes in the air by neutralizing them and turning into water.

  • Page 7: Product Specifications

    51/51 53/53 strongest air blow Refrigerant(R-410A) 1,050 1,050 Liquid 6.35 6.35 Connecting Pipe 9.52 9.52 Additional Refrigerant(R410A) Chargeless Chargeless Standard Extension length(Total) Extension length(Elevation) Product 01907F-1930B6- 01907F-1930D8- Option 271A23-370260 272328-370260 Option Code Installation 020000-100000- 020000-100000- Option 200000-300000 200000-300000 Samsung Electronics...
  • Page 8 In case of Indoor 47/49 strongest air blow Noise (Cooling/Heating) In case of Outdoor 58/58 strongest air blow Refrigerant(R-410A) 1,300 Liquid 6.35 Connecting Pipe 12.7 Additional Refrigerant(R410A) Standard Extension length(Total) Extension length(Elevation) Product 019077-1910F9-27343C-370210 Option Option Code Installation 020000-100000-200000-300000 Option Samsung Electronics...

  • Page 9: Accessories

    (Indoor Unit) Remote Control Holder DB61-06087A M4 x 16 Tapped Screws 6002-000234 CARD WARRNATY DB68-02596B Insulation B62-05580V install out DB62-05691C Insulation install SVC DB65-10088C Cable-tie Drain Plug DB67-20011A Essential Offer (Outdoor Rubber Leg DB67-01533A Unit) INSTALLATION MANUAL DB68-06488A Samsung Electronics...

  • Page 10: Disassembly And Reassembly

    3. Disassembly and Reassembly ■ Necessary Tools Item Remarks +SCREW DRIVER Adjustable Wrench (8mm, 10mm, 13mm) M6, M8 Hex Wrench Samsung Electronics...

  • Page 11: Indoor Unit

    ■ AC026MNJDKH / AC035MNJDKH / AC052MNJDKH Parts Procedure Remark Cabi Parts Open the Panel Front(ⓐ). Remove the Clip Wire(ⓑ). ⓑ ⓐ 2) Release 4 screws on the Body Front(ⓒ). ⓒ 3) Open the Body Front(ⓒ) by pulling from bottom of the part. ⓒ Samsung Electronics...
  • Page 12 Parts Procedure Remark Electrical Parts 1) Open the cover of Control Boxⓓ). ⓓ 2) Pull the PBA out along the slide guide. Cut the Cable tie. Pull all wires out from the PBA. Samsung Electronics...
  • Page 13 (one is top of the C-Box, the other is left of it) 6) Release 2 Hold Wires and pull all wires out from it . Blowing 1) Pull the Bracket Pipe(ⓔ )out. & Evap Part ⓔ 2) Release 2 screws and pull Top Discharge Kit(ⓕ) out. ⓕ Samsung Electronics...
  • Page 14 . This part is right side of the Bottom Discharge Kit(ⓖ). ⓗ 5) Pull Bottom Discharge Kit(ⓖ) Out from the bottom of it. 6) Release 3 screws and pull the Evap out from top to bottom direction. Samsung Electronics...
  • Page 15 3) Release 6 screw on the Body Back(ⓚ). ⓚ Pull the Cap VIRUS DOCTOR(ⓛ), Bracket ⓛ Wire(ⓜ) and Bracket Motor(ⓝ) out. ⓜ ⓝ 4) Pull the VIRUS DOCTOR Kit(ⓞ) and ⓞ Motor(ⓟ) out ⓚ from the Body Back(ⓚ). ⓟ Samsung Electronics...

  • Page 16: Outdoor Unit

    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. Samsung Electronics...
  • Page 17 Parts Procedure Remark common work 4) loosen 2 screws to disassemble steel-bar. 5) Loosen 2 screws to disassemble the cabi left and detach it. Samsung Electronics...
  • Page 18 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. Samsung Electronics...
  • Page 19 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. 3-10 Samsung Electronics...
  • Page 20 2)disassembly the felt comp sound. loosen the 3 bolts at the bottom . When removing the compressor, CAUTION Heat Exchanger, and Pipe, purge the Coolant inside the Compressor complete- ly and remove the pipe with a welding flame. Samsung Electronics 3-11...
  • Page 21 1) Loosen 1 pcs screw of cover control 2) Loosen 8 pcs screw of the cabi top cover. 3) Loosen 4 pcs screw of the bar steel. 4) Loosen 10 pcs screw of the cabi side front. 3-12 Samsung Electronics...
  • Page 22 Parts Procedure Remark common work Fan& motor 1) Loosen the fan screw according the indication and detach the fab propeller 2)Disconnect the wire between assy control out and motor. Samsung Electronics 3-13...
  • Page 23 3) Loosen 4 pcs motor screw. 4) Loosen 2 pcs screw of bracket motor. Assy control out 1)Loosen the screws that connected partition and case control then get the control out. 2) Loosen the screw of the cover termimal 3-14 Samsung Electronics...
  • Page 24 Parts Procedure Remark 3) Loosen 2 screws , disassemble the Coil Harmonic. 4) Loosen the screw of the cover terminal. Samsung Electronics 3-15...
  • Page 25 4) Detach the heat exchanger. When removing the compressor, CAUTION Heat Exchanger, and Pipe, purge the Coolant inside the Compressor complete- ly and remove the pipe with a welding flame. Compressor 1)Loosen the 3 bolts at the bottom of com- pressor. 3-16 Samsung Electronics...

  • Page 26: Troubleshooting

    Remove the batteries from the remote control, and then insert them again. b While holding down the (High Temp) and (Low Temp) buttons simultaneously, insert the batteries into the remote control. c Make sure that you are entered to the mode for setting the options: Samsung Electronics...
  • Page 27 Set the SEG8 value by pressing the (High Fan) button repeatedly until the value you want to set appears on the remote control display. When you press the (Low Fan) or (High Fan) button, values appear in the SEG8 following order: Samsung Electronics...
  • Page 28 (Mode) button. Auto and Off appear on the remote control display. 11 Set the SEG14 and SEG15 values: a Set the SEG14 value by pressing the (Low Fan) button repeatedly until the value you want to set appears on the remote control display. SEG14 Samsung Electronics...
  • Page 29 When you press the (Low Fan) or (High Fan) button, values appear in the SEG20 following order: 5 Press the (Mode) button. Fan and Off appear on the remote control display. Samsung Electronics...
  • Page 30 Make sure that this command is received by the indoor unit. When it is successfully received, you can hear a short sound from the indoor unit. If the command is not received, press the (Power) button again. Samsung Electronics...

  • Page 31: Setting The Indoor Unit Addresses

    Group channel Function Page Setting RMC address Group address (x16) Indication Details Indication Details Indication Details Indication Details Reserved Reserved No RMC Indication address and details RMC1 0 to 2 RMC2 0 to F RMC address setting mode Samsung Electronics...

  • Page 32: Setting The Installation Options In A Batch

    Function Page Mode temperature control fan RPM sensor Indication Details Indication Details Indication Details Indication Details Indication Details Disuse (recessed installation) Disuse Disuse High-ceiling Reserved mode (recessed Indication installation) and details Disuse (exposed installation) High-ceiling mode (exposed installation) Samsung Electronics...
  • Page 33 Cycle time of Function Page remote control compensation Swing Indication Details Indication Details Indication Details Indication Details 0 or 1 Indoor 1 Default seconds Reserved Reserved (default) Indication and details Indoor 2 2°C seconds Indoor 3 5°C seconds Indoor 4 Samsung Electronics...

  • Page 34: Changing The Addresses And Options Individually

    Example: Changing the Buzzer control (SEG17) option of the installation options to 1 disuse. Option SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 Tens position Units position Option mode to Function Page Mode of the option of the option New value change number number Indication Samsung Electronics...

  • Page 35: Display Error Mode

    Error of setting option switches for optional accessories EEPROM error EEPROM option error MPI no feedback Error : On, : Flickering, X : Off If you turn off the air conditioner when the LED is flickering, the LED is also turned off. 4-10 Samsung Electronics...

  • Page 36: Test Run Mode And View Mode

    2 : Down Protection control 1 : heating 2 : non-stop 3 : Up_limit defrosting 4 : Sown_limit 3 : over-load 4 : discharge Group address of indoor heat Three digits Two digits One digit exchanger S/W check Samsung Electronics 4-11...

  • Page 37: Eco Mode(Power Save)

    4-2-3 ECO mode(Power save) ECO mode lamp : RED Display ECO mode lamp Mode Segment 1 Segment 2 Segment 3 Segment 4 RED color ECO mode “BLANK” “BLANK” “BLANK” “BLANK” Exit ECO mode Press K3 to exit 4-12 Samsung Electronics...

  • Page 38: Troubleshooting For Outdoor Unit

    Check whether 3 phase is reversed or opened. E425 Heating operation restricted at outdoor temperature over HEATING E440 Theat_high value Cooling operation restricted at outdoor temperature below COOLING E441 Tcool_low value Fan speed error FAN1 ERROR E458 Samsung Electronics 4-13...
  • Page 39 Smart install is not installed E508 Gas leak detected Check the refrigerant E554 Error due to mismatching capacity of indoor and outdoor unit Check the indoor and outdoor unit capacity E556 Inverter EEPROM Checksum error E590 Inverter Boot Code error E660 4-14 Samsung Electronics...
  • Page 40 Operation Off protection of the compressor control error Check the input power Outdoor unit [Inverter] Total current error/PFC over Check the coolant charging status Operation Off protection current error Check the normal operation of outdoor fan control error Samsung Electronics 4-15...

  • Page 41: Wired Remote Controller

    Wired remote Normal operation error COM2 terminal of the indoor unit controller error Wired remote controller COM2 Wired remote Check that Com1, Com2 setting DIP switch is set to Com2 Normal operation option setting error controller error 4-14 Samsung Electronics...

  • Page 42: Indoor Temperature Sensor (Open/Short)

    Temp. (°C) (KΩ) 5.800 6.900 At that time, does the resistance value deviate from the 8.300 temp. table beside? 10.00 12.10 Indoor temp. sensor 14.70 self-defect (replacement) 18.00 Resume operation after replacing PCB 22.00 28.30 33.90 42.30 Samsung Electronics 4-15...
  • Page 43 (KΩ) 5.800 6.900 At that time, does the 8.300 resistance value deviate from the temperature 10.00 table beside? 12.10 Indoor Heat Exchange temp. 14.70 sensor 18.00 self-defect (replacement) Resume operation after replacing PCB 22.00 28.30 33.90 42.30 4-16 Samsung Electronics...
  • Page 44 Is Motor connector disconnected from the PCB? Resume operation after connecting to the connector PCB Is there any clogging (binding) of foreign substances in the MotorFan? Resume operation after removing the foreign substances. Resume operation after replacing PCB Samsung Electronics 4-17...

  • Page 45: Communication Error After Completion Of Tracking

    PCB and connector After reconnecting the communication line that links outdoor and indoor units, remove communication connector in the indoor PCB. If communication does not work during operation, replace PCB of the indoor unit. Good defect +0.7V -0.7V 4-18 Samsung Electronics...

  • Page 46: Eeprom Circuit Part Defect

    (necessary component missing in EEPROM circuit part/ damage/ soldering defect) Resume operation after repairing it according to P8-2 circuit diagram’s EEPROM part, P6~6-10 component list. If problem occurs during re-operation, replace PCB Resume operation after replacing PCB Samsung Electronics 4-19...
  • Page 47 PCB Measure the amount of Ion with tester. VIRUS DOCTOR Kit Tester: ITC201A 100,000. he number of measured on Is more Than Normal operation Change the VIRUS DOCTOR Kit (it’s out of the work) 4-20 Samsung Electronics...
  • Page 48 Is the voltage between Replace the inverter PBA the terminal 2 (~) and 4 (~) of the bridge diode 220V? Is the fuse connected? Replace the fuse Replace the inverter PBA Is the resistance value of R001 200Ω? Cont. Samsung Electronics 4-21...
  • Page 49 Outdoor unit is not powered on – Initial diagnosis (cont.) Cont. Is the reactor connector Connect the reactor connected correctly? Replace the PBA. 4-22 Samsung Electronics...

  • Page 50: Communication Error

    Is the power is normal? Exchange the PBA of no power unit (check the LED Lamp Exchange the indoor unit PBA. Terminate the service. Is the communication error occurred again? Exchange the outdoor unit PBA. Samsung Electronics 4-23...

  • Page 51: Samsung Electronics

    Connect the sensor to PBA connector (6pin) supply power and measure the voltage of #1-#2 in the connector Exchange the PBA of no power unit Below 0.5V or Over 4.5V? Micom error or connector check Exchange the Outdoor PBA 4-24 Samsung Electronics...
  • Page 52 Connect the sensor to PBA connector (4pin) supply power and measure the voltage of #1-#2 in the connector Exchange the PBA of no Ourdoor PBA Below 0.5V or Over 4.5V? Micom error or connector check Exchange the Outdoor PBA Samsung Electronics 4-25...

  • Page 53: Outdoor Coil Temperature Sensor Error

    40°C - 5.83kohm Connect the sensor to PBA connector (6pin) supply power and measure the voltage of #5-#6 in the connector Exchange the Outdoor PBA Below 0.5V or Over 4.5V? Micom error or connector check Exchange the Outdoor PBA 4-26 Samsung Electronics...
  • Page 54 40°C - 5.83kohm Connect the sensor to PBA connector(4pin) supply power and measure the voltage of #3-#4 in the connector Exchange the Outdoor PBA Below 0.5V or Over 4.5V? Micom error or connector check Exchange the Outdoor PBA Samsung Electronics 4-27...

  • Page 55: Outdoor Discharge Temperature Sensor Error

    40°C - 115kohm Connect the sensor to PBA connector (6pin) supply power and measure the voltage of #3-#4 in the connector Exchange the Outdoor PBA Below 0.5V or Over 4.5V? Micom error or connector check Exchange the Outdoor PBA 4-28 Samsung Electronics...
  • Page 56 40°C - 115kohm Connect the sensor to PBA connector(4pin) supply power and measure the voltage of #3-#4 in the connector Exchange the Outdoor PBA Below 0.5V or Over 4.5V? Micom error or connector check Exchange the Outdoor PBA Samsung Electronics 4-29...

  • Page 57: Outdoor Discharge Over Temperature Error

    Restart after power off Terminate the service Is the discharge over temperature sensor error appeared again? Download the EEPROM data Is the discharge over temperature sensor error Terminate the service appeared again? Exchange the Outdoor PBA Exchanged the Compressor 4-30 Samsung Electronics...

  • Page 58: Outdoor Fan Motor Error

    Is the voltage of CN901 #3-#5 and #3-#6 with in Exchange the Outdoor PBA 1Vdc~15Vdc during the operation? PBA problem or Motor problem Change the PBA first and check the operation Exchange the Fan motor Samsung Electronics 4-31...

  • Page 59: Compressor Starting Error

    Connect the comp wire normally Is the connection of compressor wire is normal? Download the EEPROM data Is the restart error occurred again? Terminate the service Is the compressor body and interphase Exchange the Outdoor PBA resistance insulated? Exchanged the Compressor 4-32 Samsung Electronics...

  • Page 60: Compressor Wire Missing Error/Rotation Error

    Connect the comp wire normally Is the connection of compressor wire is normal? (PBA and Compressor) Is the restart error occurred again? Terminate the service Is the compressor body and interphase Exchange the Outdoor PBA resistance insulated? Exchanged the Compressor Samsung Electronics 4-33...

  • Page 61: Over Current) Error

    Terminate the service occurred again? Correct the sensor position or exchange the Is the position of temperature sensor and sensor sensing value normal? Is the compressor body and interphase Exchange the Outdoor PBA resistance insulated? Exchanged the Compressor 4-34 Samsung Electronics...

  • Page 62: Dc_Link Voltage Sensor Error

    Normal range(280Vdc~320Vdc) Is the DC_link sensing voltage(R104 or R004) is normal in Exchange the Outdoor PBA operation mode? Normal range (0.2Vdc~2.8Vdc) Exchange the Outdoor PBA Is the reactor insulation damaged? Exchange the Reactor Samsung Electronics 4-35...

  • Page 63: Dc_Link Voltage Under/Over Error, Over Voltage Protection Error/Pfc Over Load

    Check the input power mode? Normal range(280Vdc~320Vdc) Is the DC_link sensing voltage(R104 or R004) is normal in Exchange the Outdoor PBA operation mode? Normal range (0.2Vdc~2.8Vdc) Exchange the Outdoor PBA Is the reactor insulation damaged? Exchange the Reactor 4-36 Samsung Electronics...

  • Page 64: Dc_Link Voltage Sensor Error

    Correct the sensor position or exchange the Is the position of temperature sensor and the sensing value sensor normal? Is the connection cable for the compressor and Correct the cable connection power terminal normal? Exchange the Outdoor PBA Samsung Electronics 4-37...

  • Page 65: Current Sensor Error/Input Current Sensor Error

    3) Is there no short or open around IC451(PF2) or IC451,IC452(PF3)? 2. Troubleshooting procedure Restart after power off. Exchange the Outdoor PBA Is the PFC shunt and IPM shunt resistance value correct? Terminate the service Is the current sensor error appeared again? Exchange the Outdoor PBA 4-38 Samsung Electronics...

  • Page 66: Heatsink Sensor Error/Heatsink Over Heat

    4) Is the cover assembly in conrol-box normal? 2. Troubleshooting procedure Restart after power off. Fastening the screw Are there screws in PBA-heatsink? (4 screws) Check the fan connection Is the fan operation normal? Change the Fan motor Exchange the Outdoor PBA Samsung Electronics 4-39...

  • Page 67: Comp Vlimit Error/Comp Current Limit Error

    Terminate the service again? Is the position of temperature sensor and Correct the sensor position or exchange the sensing value normal? sensor Is the compressor body and interphase Exchange the Outdoor PBA resistance insulated? Exchange the Outdoor PBA 4-40 Samsung Electronics...

  • Page 68: Eeprom Error/Otp Error

    3) Did you download or insert EEPROM IC, after changing outdoor PBA? 2. Troubleshooting procedure power off and download EEPROM data (or. Insert the service EEPROM IC) Restart after power off Terminate the service Is the error appeared again? Exchange the Outdoor PBA Samsung Electronics 4-41...

  • Page 69: Ac Zero Cross Signal Error

    1) Check the power condition at customer's house (Is there any power noise?) 2) Have been there power failure? 2. Troubleshooting procedure Restart after power off Is the AC line zero cross signal error appeared Terminate the service again? Exchange the Outdoor PBA 4-42 Samsung Electronics...

  • Page 70: Operation Condition Secession Error

    * Heating mode * * Cooling mode * Is the outdoor temperature over 40°C or under Is the outdoor temperature under °C? -30°C? The temperature condition is too poor to operate. Wait until temperature is changed Samsung Electronics 4-43...

  • Page 71: Capacity Miss Match Error

    Reset the option code again at indoor unit Is the capacity miss match error appeared Terminate the service again? Download the EEPROM data Terminate the service Is the capacity miss match error appeared again? Exchange the Outdoor PBA Exchange the Indoor PBA 4-44 Samsung Electronics...

  • Page 72: Gas Leak Error

    Is the EEV valve is operation? Change the EEV valve Check the sound of EEV valve after power on. Check the pipe crack. Is the pressure of refrigerant normal? Fill up the refrigerant. Exchange the Indoor PBA Exchange the Outdoor PBA Samsung Electronics 4-45...

  • Page 73: Mds Error Flow Chart

    ◆MDS Function only can be set in wired remote controller or central controller. ◆Error Message(Error message will be appeared after 3minutes) -Wired remote controller: “E143” message is pop up. -Display Panel: Operation & filter LED is blinking at the same time,after indoor unit is power off. 4-46 Samsung Electronics...
  • Page 74 Samsung Electronics 4-47...

  • Page 75: Pcb Diagram

    #1. DC 12V #2~#5. Control SIGNAL #2.Communication Signal F2 #2~#5.Communication Signal #1. Communication Signal F1 #2. Communication Signal F2 CN20-MICOM Download2 CN10-MICOM Download1 > For Developer,Not for field >For Developer, Not for field > 7pin Downloader >10pin Downloader Samsung Electronics...

  • Page 76: Display Pcb

    #1, #2, #3, #4, #5. >DISPLAY LED Control #6. TOUCH S/W Reset(DC 5V) connecting #7. TOUCH S/W Out(DC 5V) connector #8. REMOCON SIGNAL Receive #9. GND #10. VCC(DC 5V) 5-1-3 DAMPER PBA ① CN01-DAMPER S/W connecting #1. DC 5V connector #2. GND Samsung Electronics...

  • Page 77: Outdoor Unit

    SUB PBA POWER:SMW200-05P BLK EEV1:SMW250-05 RED COMP:DBT061-3P WHT SMPS: SMW250-03 BLU EEPROM:B7P-MQ WHT TEMP SENSOR: SMW200-08P WHT MAIN DOWNLOAD:YDW200-20 BLK SUB PBA: SMW200-10P BLK DRED:SMW250-05 WHT INV DOWNDOWN: YDAW200-20TR BLK SUB PBA: SMW200-10P WHT ENABLE CGND: SMW250-03 RED Samsung Electronics...
  • Page 78 5-2-2 MAIN PCB  AC052MXADKH 11 12 Samsung Electronics...
  • Page 79 CN901 : BLDC MOTOR CN551: Downloader CN451 : COMP POWER CN051 : Reactor #1: DV310V #1~#10 : Download #1 : COMP U-Phase #1~#2 : Reactor #3: GND #2 : COMP V-Phase #4: DC15V #3 : COMP W-Phase #5: FAN_PWM #6: FAN_Feedback Samsung Electronics...
  • Page 80 5-2-3 SUB PCB  AC052MXADKH ① ② CN12 : DC12V CN951 : SIGNAL TO MAIN PCB #1 : DC12V #1~#28 : SIGNAL TO MAIN PCB #2 : GND Samsung Electronics...

  • Page 81: Wiring Diagram

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

  • Page 82: Outdoor Unit

    6-2 Outdoor Unit  AC026MXADKH / AC035MXADKH This Document can not be used without Samsung’s authorization. Samsung Electronics...
  • Page 83  AC052MXADKH / AC071MXADKH This Document can not be used without Samsung’s authorization. Samsung Electronics...

  • Page 84: Reference Sheet

    PACK MULTI RAC-Vivace AIR HANDIING UNIT DVM HOME AIR HANDLING UNIT SINGLE HYDRO UNIT MULTI HYDRO UNIT MONO HYDRO UNIT WATER TANK FLAT ※ "/" can be removed from the buyer card if there are not enough digits. STAND Samsung Electronics...

  • Page 85: 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 compressor will overload the compressor.) Samsung Electronics...

  • Page 86: Pressure Graph

    27/19 27/1 21/15 Outdoor Temp.(°C) Heating S Heating 35.0 Indoor (°C) 28/18 27/19 20/15 Outdoor(°C) 30.0 34.3 34.0 30.6 29.8 29.5 26.6 25.0 25.4 25.1 22.6 32/2 28/18 20.0 24.2 24.0 21.6 27/19 27/1 20/15 15.0 Outdoor Temp.(°C) Samsung Electronics...
  • Page 87 This Service Manual is a property of Samsung Electronics Co., Ltd. © Samsung Electronics Co., Ltd. Jun. 2016. Any unauthorized use of Manual can be punished under applicable Printed in China. International and/or domestic law. Samsung Electronics...

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