1. DL manuals
  2. Samsung
  3. Air Conditioner
  4. AC012KXADCH/AA
  5. Service Manual

Samsung AC012KXADCH/AA Service Manual

Manual is about: SYSTEM AIR CONDITIONER

Summary of AC012KXADCH/AA

  • Page 1

    Refer to the service manual in the gspn(see the rear cover) for the more information. Air conditioner contents system air conditioner 1. Precautions 2. Product specifications 3. Disassembly and reassembly 4. Troubleshooting 5. Pcb diagram 6. Wiring diagram 7. Reference sheet ac012/018/024mnadch indo...

  • Page 2: Contents

    2 samsung electronics contents 1 1. Precautions ........................................................................................................................................ 1-1 1-1 precautions for the service ..................................................................................

  • Page 3

    Samsung electronics 3 4-4-12 dc_link voltage sensor error ........................................................................................................... 4-35 4-4-13 current sensor error/input current sensor error .................................................................... 4-36 ...

  • Page 4: 1. Precautions

    Samsung electronics 1-1 1. Precautions 1-1 precautions for the service xuse the standard parts when replacing the electric parts. – confirm the model name, rated voltage, rated current of the electric parts. Xwhen repairing the equipment, connection of the harness parts must be firm and solid. – a l...

  • Page 5

    1-2 samsung electronics 1-3 precautions related to product safety x do not pull the power cord and do not touch the power plug or aux power switch with wet hands. – it might cause electric shock or fire. X a damaged power line or power plug must be replaced to prevent danger. X do not bend the power...

  • Page 6: 2. Product Specifications

    Samsung electronics 2-1 x built-in cassette type after installed, the air conditioner can be harmonized with a room interior. X high performance & energy saving with the advanced bldc inverter technology, it makes a room cool with highly energy saving and arises the efficiency of air conditioner. Xl...

  • Page 7

    2-2 samsung electronics item ac012mnadch ac012kxadch ac018mnadch ac018jxadch image indoor unit outdoor unit remote controller power product 1Φ, 220~240v, 50hz 1Φ, 220~240v, 50hz indoor l x h x d mm 750*246*249 896*261*261 outdoor l x h x d mm 790*285*548 880*310*638 indoor product kg(net) 7.6 10.6 o...

  • Page 8

    Samsung electronics 2-3 item ac024mnadch ac024jxadch ac030mntdch ac030jxadch image indoor unit outdoor unit remote controller power product 1Φ, 220~240v, 50hz 1Φ, 220~240v, 50hz indoor l x h x d mm 1065*294*301 1280*345*253 outdoor l x h x d mm 940*330*998 940*330*998 indoor product kg(net) 14.5 18....

  • Page 9

    2-4 samsung electronics item ac036mntdch ac036jxadch image indoor unit outdoor unit remote controller power product 1Φ, 220~240v, 50hz indoor l x h x d mm 1280*345*253 outdoor l x h x d mm 940*330*1210 indoor product kg(net) 18.5 outdoor product kg(net) 88.0 capacity cooling(std) btu/h 36 000 heatin...

  • Page 10

    Samsung electronics 2-5 item description code no. Q’ty remark remote control db93-15882s 1 essential offer (indoor unit) batteries for remote control 4301-000121 2 user & installation manual db68-07119a 1 remote control holder db61-06087a 1 m4 x 16 tapped screws 6002-000234 2 cap screws db67-01404b ...

  • Page 11

    Samsung electronics 3-1 item remarks +screw driver adjustable wrench (8mm, 10mm, 13mm) m6, m8 hex wrench xnecessary tools 3. Disassembly and reassembly.

  • Page 12

    3-2 samsung electronics 3-1 indoor unit xac012mnadch / ac018mnadch / ac024mnadch no parts procedure remark 1 panel-front 1) stop the driving of air conditioner and shut off main power supply. 2) detach filter pre from the panel front. 3) cover panel is assembled on bottom of indoor unit as shown in ...

  • Page 13

    Samsung electronics 3-3 no parts procedure remark 4) cover panel is fixed to body by hook in center area and side area. 5) separate the hook after pushing both end of cover panel as shown in the figure. (watch out for the damage of the hook) 6) raise front part upward obliquely as shown in the figur...

  • Page 14

    3-4 samsung electronics no parts procedure remark caution: assembly of cover panel after service end. - reassembly is in the reverse order of the removal. - piping and drain hose must be careful not to damage and progress must be done with both hands. Hook (side) hook (center) screw cap screw.

  • Page 15

    Samsung electronics 3-5 no parts procedure remark 7) to detach the panel-front from the main frame, unfasten 2 screws at the bottom. (use + screw driver) 8) to detach the cover-panel from the main frame, loosen 4 hook structures. When separate the hook : use the (-) screw driver. (-)screw driver ins...

  • Page 16

    3-6 samsung electronics no parts procedure remark 9) remove the panel frame from the main frame as shown on the right side..

  • Page 17

    Samsung electronics 3-7 no parts procedure remark 2 contorl in 1) lossen sub pba wire. Caution: when you separate the connector, pull pressing the locking button. 2) lossen stepping motor, eev, display, sensor, spi, fuse wire. Caution: when you separate the connector, pull pressing the locking butto...

  • Page 18

    3-8 samsung electronics no parts procedure remark 5 evaporator 9) take off the case-control from the main frame after loosen the remaining connector. Caution: when you separate the connector, pull pressing the locking button. 3 tray drain 1) to detach tray-drain from the main frame, pull the bottom ...

  • Page 19

    Samsung electronics 3-9 no parts procedure remark 4 evaporator 1) detach the holder pipe. 2) unfasten the screw at the left side. (use + screw driver) 3) unfasten the screw at the right side. (use + screw driver) 4) to detach evaporator from the main frame, pull the bottom of the evaporator towards ...

  • Page 20

    3-10 samsung electronics no parts procedure remark 5 fan motor & cross fan 1) unfasten the screw. (use + screw driver) 2) detach the fan motor case. 3) unfasten the screw a little. (use + screw driver) 4) pull the cross-fan to the left side..

  • Page 21

    Samsung electronics 3-11 xac030mntdch / ac036mntdch no parts procedure remark 1 panel-front 1) stop the driving of air conditioner and shut off main power 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...

  • Page 22

    3-12 samsung electronics no parts procedure remark 2 tray drain 1) loosen stepping motor wire and detach the hook of main frame. 2) to detach tray-drain from the main frame, pull the bottom of the tray-drain towards you. 3) to detach tray-drain from the main frame , pull the bottom of the tray-drain...

  • Page 23

    Samsung electronics 3-13 no parts procedure remark 4) loosen motor wires(white). 5) take off the case-control from the main frame. (use + screw driver) 4 pba 1) loosen the step up/down connector(cn802). Caution: when you separate the connector, pull pressing the locking button. 2) loosen the fuse ch...

  • Page 24

    3-14 samsung electronics no parts procedure remark 3) loosen the eva in/out connector. (cn403) caution: when you separate the connector, pull pressing the locking button. 4) loosen the humidity sensor connector(cn401). ->option connector. Caution: the terminal is locking type. So, when you separate ...

  • Page 25

    Samsung electronics 3-15 no parts procedure remark 7) loosen the comm wire connector(cn303). Caution: when you take off the pba, don’t touch the components. Please hold the pba both side. 8) loosen the motor connector(cn701). Caution: when you separate the connector, pull pressing the locking button...

  • Page 26

    3-16 samsung electronics no parts procedure remark 2) unfasten the screw at the left side. (use + screwdriver) 3) detach the holder pipe. (use + screw driver) 4) detach the bracket-evap. (use + screw driver) 5) detach the holder evap. (use + screw driver) 6) loosen 1 fixing earth screw right side. (...

  • Page 27

    Samsung electronics 3-17 no parts procedure remark 6 fan motor & cross fan 1) loosen 6 fixing screws of holder-motor 2) unfasten the screw a little. (use + screw driver) 3) unfasten the screw a little and pull the motor fan to the right side. (use + screw driver) 4) loosen 1 fixing screws of holder-...

  • Page 28

    3-18 samsung electronics ■ ac012kxadch no parts procedure remark 1 common work 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. 3-2 out...

  • Page 29

    Samsung electronics 3-19 no 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..

  • Page 30

    3-20 samsung electronics no parts procedure remark 2 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..

  • Page 31

    Samsung electronics 3-21 no parts procedure remark 3 assy control out 1) lossen fixing 1 screw from cover -control 2) detach several connections from assy con- trol out, take out assy control out. 4 heat exchanger 1) release the refrigerant at first 2) looosen fixing screw on both side. 3) disaessem...

  • Page 32

    3-22 samsung electronics no parts procedure remark 5 compressor 1) disconnect the compressor lead wire . 2) disassembly the felt comp sound. Loosen the 3 bolts at the bottom of.

  • Page 33

    Samsung electronics 3-23 no parts procedure remark 1 common work 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. Qac018jxadch.

  • Page 34

    3-24 samsung electronics no 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..

  • Page 35

    Samsung electronics 3-25 no parts procedure remark 2 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..

  • Page 36

    3-26 samsung electronics no parts procedure remark 3 assy control out 1) lossen fixing 1 screw from cover -control 2) detach several connections from assy con- trol out, take out assy control out. 4 heat exchanger 1) release the refrigerant at first 2) looosen fixing screw on both side. 3) disaessem...

  • Page 37

    Samsung electronics 3-27 no parts procedure remark 5 compressor 1) disconnect the compressor lead wire . 2)disassembly the felt comp sound. Loosen the 3 bolts at the bottom of.

  • Page 38

    3-28 samsung electronics no parts procedure remark 1 cabi front rh you must turn off the power before disassembly. 1) unscrew and remove two mounting screw in the cabinet front rh. (use +screw driver) 2 cabi top 1) unscrew and remove 9 screws on each side of the cabinet-top. (use +screw driver) 3 ca...

  • Page 39

    Samsung electronics 3-29 no parts procedure remark 4 guard cond 1) pull the sensor from guard cond. 2) unscrew and remove 4 screws in the guard cond. (use +screw driver) 5 cabi back rh 1) pull the sensor from cabi back rh. 2) unscrew and remove 4 screws on each side of the cabinet back rh. (use +scr...

  • Page 40

    3-30 samsung electronics no parts procedure remark 6 cabi install back 1) unscrew and remove 1 screw in the cabinet-install back. (use +screw driver) 7 cabi front lf 1) unscrew and remove 10 screws in the cabinet-front lf. (use +screw driver).

  • Page 41

    Samsung electronics 3-31 no parts procedure remark 8 fan 1) turn 2 mounting nuts as shown in the picture and remove it. (use adjustable wrench).

  • Page 42

    3-32 samsung electronics no parts procedure remark 9 motor 1) separate the fan propeller. 2) unscrew and remove the 8 motor mounting screws. (use +screw driver) 3) disconnect the motor wire from ass'y control out. 10 bracket motor 1) unscrew and remove 2 mounting screws in bracket motor. (use +screw...

  • Page 43

    Samsung electronics 3-33 no parts procedure remark 11 control out 1) disconnect 4 connecters from ass'y control out. 2) unscrew and remove 1 mounting screw in control out. (use +screw driver) 3) separate ass'y control out..

  • Page 44

    3-34 samsung electronics no parts procedure remark 12 ass'y 4way valve 1) purge the coolant first. 2) unscrew and remove 2mounting screws in muffler. 3) unscrew and remove 2 mounting screws in service valve. (use +screw driver) 4) separate the pipe from the entrance/exit using a welder. When removin...

  • Page 45

    Samsung electronics 3-35 no parts procedure remark 13 ass;y eev valve 1) unscrew and remove 2 mounting screws in service valve. (use +screw driver) 2) separate the pipe from the entrance/exit using a welder. 14 compressor 1) unscrew and remove 1 mounting nut in cover terminal. (use adjustable wrench...

  • Page 46

    3-36 samsung electronics no parts procedure remark 3) as shown in the picture, unscrew and remove 3 mounting screws from the bottom. (use adjustable wrench) 15 cond out 1) unscrew and remove 3 screws on each side of the assy cond out. (use +screw driver) 2) separate the compressor felt sound..

  • Page 47

    Samsung electronics 3-37 no parts procedure remark 1 cabi front rh you must turn off the power before disassembly. 1) unscrew and remove two mounting screw in the cabinet front rh. (use +screw driver) 2 cabi top 1) unscrew and remove 9 screws on each side of the cabinet-top. (use +screw driver) 3 ca...

  • Page 48

    3-38 samsung electronics no parts procedure remark 5 cabi back rh 1) pull the sensor from cabi back rh. 2) unscrew and remove 4 screws on each side of the cabinet back rh. (use +screw driver) 6 cabi install back 1) unscrew and remove 1 screw in the cabinet-install back. (use +screw driver) 7 cabi fr...

  • Page 49

    Samsung electronics 3-39 no parts procedure remark 9 motor 1) separate the fan propeller. 2) unscrew and remove the 8 motor mounting screws. (use +screw driver) 3) disconnect the motor wire from ass'y control out. 10 bracket motor 1) unscrew and remove 2 mounting screws in bracket motor. (use +screw...

  • Page 50

    3-40 samsung electronics no parts procedure remark 12 assy 4way valve 1) purge the coolant first. 2) unscrew and remove 2 mounting screws in service valve. (use +screw driver) 3) separate the pipe from the entrance/exit using a welder. When removing the compres- sor, heat exchanger, and pipe, purge ...

  • Page 51: 4. Troubleshooting

    Samsung electronics 4-1 4. Troubleshooting you cannot set both of the indoor unit addresses and the installation options in a batch: set both of them respectively. 4-1-1 common steps for setting the addresses and options mr-ec00 and mr-eh00 remote controls low temp button high temp button mode butto...

  • Page 52

    4-2 samsung electronics take the steps presented in the following table: steps remote control display 1 set the seg2 and seg3 values: a set the seg2 value by pressing the (low fan) button repeatedly until the value you want to set appears on the remote control display. Seg2 b set the seg3 value by p...

  • Page 53

    Samsung electronics 4-3 steps remote control display 6 press the (mode) button. Fan and on appear on the remote control display. 7 set the seg9 and seg10 values: a set the seg9 value by pressing the (low fan) button repeatedly until the value you want to set appears on the remote control display. Se...

  • Page 54

    4-4 samsung electronics steps remote control display b set the seg15 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 following order: seg15 1 press the (m...

  • Page 55

    Samsung electronics 4-5 steps remote control display 6 set the seg21 and seg22 values: a set the seg21 value by pressing the (low fan) button repeatedly until the value you want to set appears on the remote control display. Seg21 b set the seg22 value by pressing the (high fan) button repeatedly unt...

  • Page 56

    4-6 samsung electronics 1 check whether the air conditioner operates in accordance with the option values you have set: a reset the indoor or outdoor unit. T indoor unit : press the (set) and (low fan) buttons on the remote control simultaneously for 4 seconds. T outdoor unit : press the k3 button. ...

  • Page 57

    Samsung electronics 4-7 caution t the main address must be set to a value in the range 0 to 14. If you set other values, communication error will occur. T if any of seg5 and seg6 is set to a value in the range a to f, the main address of the indoor unit does not change. T if seg3 is set to 0, the in...

  • Page 58

    4-8 samsung electronics option seg7 seg8 seg9 seg10 seg11 seg12 function page use of drain pump reserved reserved reserved reserved indication and details indication details indication details 1 0 disuse 1 use 2 use with 3 minute delay option seg13 seg14 seg15 seg16 seg17 seg18 function page use of ...

  • Page 59

    Samsung electronics 4-9 t even if you set the use of drain pump (seg8) option to 0, it is automatically set to 2 (the drain pump is used with 3 minute delay). T if you set the maximum filter usage time (seg18) option to a value other than 2 and 6, it is automatically set to 2 (1000 hours). T if you ...

  • Page 60

    4-10 samsung electronics abnormal condition error code led display error on indoor temperature sensor (short or open) e121 1. Error on eva-in sensor (short or open) 2. Error on eva-out sensor (short or open) 3. Discharge sensor error (short or open) e122 e123 e126 indoor fan error e154 1. Error on o...

  • Page 61

    Samsung electronics 4-11 4-2 troubleshooting for outdoor unit the table below list the self-diagnostic routines. For some of error codes, you must contact an authorized service centre. If an error occurs during the operation, it is displayed on the outdoor unit pcb led, both main pcb and inverter pc...

  • Page 62

    4-12 samsung electronics no. Error code meaning remarks 23 e461 error due to operation failure of inverter compressor - 24 e462 system stop due to full current control - 25 e463 over current trip / pfc over current error check olp sensor 26 e464 ipm over current(o.C) ipm 27 e465 comp. Over load erro...

  • Page 63

    Samsung electronics 4-13 indoor unit display symptom in case of open or short circuit of indoor temperature sensor failure short or leakage of the corresponding sensor yes no no in this case, is the resistance value out of range in the temperature table on the right? Yes is indoor temperature sensor...

  • Page 64

    4-14 samsung electronics yes no no in this case, is the resistance value out of range in the temperature table on the right? Yes is the indoor heat exchanger temperature sensor connector disconnected from the pcb? Restart the system after replacing the pcb restart the system after connecting the con...

  • Page 65

    Samsung electronics 4-15 indoor unit display symptom indoor unit fan does not run /runs at excessive high speed and stops failure check if the motor connector is disconnected/ check the motor fan assembly status 4-3-3 indoor fan error yes no yes is there foreign substance stuck in the motor fan? Yes...

  • Page 66

    4-16 samsung electronics indoor unit display symptom communication error between the indoor and outdoor unit for two minutes failure communication error between the indoor unit and outdoor unit 4-3-4 communication error after finishing tracking no yes no yes is there a response from the indoor pcb? ...

  • Page 67

    Samsung electronics 4-17 indoor unit display symptom the indoor unit floating sensor is open and that state is maintained for more than one minute failure increase in the drain pan water level due to failure of the indoor unit drain pump, or float sensor failure 4-3-5 indoor unit float sensor error ...

  • Page 68

    4-18 samsung electronics restart the unit after replacing the pcb indoor unit display symptom eeprom circuit failure failure eeprom component failure, eeprom circuit parts missing/damaged/soldering failure 4-3-6 eeprom circuit failure no yes are the eeprom circuit components in good conditions? (mis...

  • Page 69

    Samsung electronics 4-19 4-19 4-3-7 outdoor unit is not powered on – initial diagnosis 1. Check items 1) is the power supply voltage 220v? 2) is the ac power connected correctly? 3) are the leds in the main pcb and inverter pcb of the outdoor unit on? 4) is the input power voltage of the indoor unit...

  • Page 70

    4-20 samsung electronics yes outdoor unit is not powered on – initial diagnosis (cont.) yes connect the reactor no is the reactor connector connected correctly? Replace the pba. Cont..

  • Page 71

    Samsung electronics 4-21 4-4-1 communication error 1. 1.Checklist : 1) is the cable between the indoor unit and outdoor unit connected correctly? 2) isn't the power cable and communication cable cross? 2. Troubleshooting procedure yes restart after power off. Terminate the service exchange the indoo...

  • Page 72

    4-22 samsung electronics 4-4-2 outdoor temperature sensor error 1. 1.Checklist : 1) is the cable between the indoor unit and outdoor unit connected correctly? 2) is the sensor placed correctly? 3) does the both terminal of sensor satisfy the resistance value in accordance with temperature? 4) is the...

  • Page 73

    Samsung electronics 4-23 4-4-2-2. Troubleshooting procedure (pf3) yes reconnect the sensor connector. Micom error or connector check no is the sensor resistance value #1-#2 10kohm±3% at the room temperature of 25 °c is the sensor connector(cn502) connected correctly in accordance with a colorred,4pi...

  • Page 74

    4-24 samsung electronics 4-4-3 outdoor coil temperature sensor error 1.Checklist : 1) is the sensor connected correctly? 2) is the sensor placed correctly? 3) does the both terminal of sensor satisfy the resistance value in accordance with temperature? 4) is the resistance value of sensor connection...

  • Page 75

    Samsung electronics 4-25 4-4-3-2. Troubleshooting procedure (pf3) yes reconnect the sensor connector. Micom error or connector check no is the sensor resistance value #3-#4 (cn501) 10kohm±3% at the room temperature of 25 25 °c is the sensor connector(cn501) connected correctly in accordance with a c...

  • Page 76

    4-26 samsung electronics 4-4-4 outdoor discharge temperature sensor error 1.Checklist : 1) is the sensor connected correctly? 2) is the sensor placed correctly? 3) does the both terminal of sensor satisfy the resistance value in accordance with temperature? 4) is the resistance value of sensor conne...

  • Page 77

    Samsung electronics 4-27 sensor replace sensor resistance value : 20 °c - 242kohm 30 °c - 166ohm 35 °c - 138ohm 40 °c - 115kohm 4-4-4-2. Troubleshooting procedure (pf3) yes reconnect the sensor connector. Micom error or connector check no is the sensor resistance value #3-#4 (cn501) 10kohm±3% at the...

  • Page 78

    4-28 samsung electronics 4-4-5 outdoor discharge over temperature error 1.Checklist : 1) check the discharge temperature in the outdoor unit 2) check the compressor locking or gas leak 3) 3) download the eeprom data 2. Troubleshooting procedure yes yes terminate the service exchange the outdoor pba ...

  • Page 79

    Samsung electronics 4-29 4-4-6 outdoor fan motor error 1.Checklist : 1) are the input power voltage and the power connection correct? 2) is the motor wire connected to the outdoor pba correctly? 3) is there no assembly error or none-assembly in the terminal of motor wire connector? 4) is there no ob...

  • Page 80

    4-30 samsung electronics 4-4-7 compressor starting error 1.Checklist : 1) is the connection of cable for the compressor? 2) is the compressor wire is connected clockwise? U(red)-v(blu)-w(yel) 3) is the interphase resistance of compressor normal? 2. Troubleshooting procedure terminate the service dow...

  • Page 81

    Samsung electronics 4-31 4-4-8 compressor wire missing error/rotation error 1.Checklist : 1) is the connection of cable for the compressor? 2) is the compressor wire is connected clockwise? U(red)-v(blu)-w(yel) 3) is the interphase resistance of compressor normal? 2. Troubleshooting procedure termin...

  • Page 82

    4-32 samsung electronics 4-4-9 o.C(over current) error 1.Checklist : 1) is the ipm shunt(pf2:r451,r452,r453,pf3:r413,r414,r415) resistance value correct? Check the resistor is opened 2) is the condition of surrounding temperature abnormal overload? 3) is there any problem as like the temperature sen...

  • Page 83

    Samsung electronics 4-33 4-4-10 dc_link voltage sensor error 1.Checklist : 1) is the input voltage of outdoor terminal block is normal? 2) is the reactor wire connected? 3) is the dc_link capacitor(pf2:ce101,ce102,ce103,pf3:ce001,ce002,ce003,ce004)) assembled in accordance the specification? (outdoo...

  • Page 84

    4-34 samsung electronics 4-4-11 dc_link voltage under/over error, over voltage protection error/pfc over load 1.Checklist : 1) is the input voltage of outdoor terminal block is normal? 2) is the reactor wire connected? 3) is the reactor wire connected? 4) is the dc_link capacitor(pf2:ce101,ce102,ce1...

  • Page 85

    Samsung electronics 4-35 4-4-12 dc_link voltage sensor error 1.Checklist : 1) is the pfc shunt(pf2:r062,r063,pf3:r807,r808,r809) resistance value correct? Check the resistor is opened 2) is the condition of surrounding temperature abnormal overload? 3) is there any problem as like the temperature se...

  • Page 86

    4-36 samsung electronics 4-4-13 current sensor error/input current sensor error 1.Checklist : 1) is the pfc shunt(pf2:r062,r063,pf3:r807,r808,r809) resistance value correct? Check the resistor is opened 2) is the ipm shunt(pf2:r451,r452,r453,pf23:r413,r414,r415) resistance value correct? Check the r...

  • Page 87

    Samsung electronics 4-37 4-4-14 heatsink sensor error/heatsink over heat 1.Checklist : 1) are there screws assembly in pba-heatsink? 2) is the gap pba-heatsink 3) is the fan operation normal? 4) is the cover assembly in control-box normal? 2. Troubleshooting procedure fastening the screw no are ther...

  • Page 88

    4-38 samsung electronics 4-4-15 comp vlimit error/comp current limit error 1.Checklist : 1) is the pfc shunt(pf2:r062,r063,pf3:r807,r808,r809) resistance value correct? Check the resistor is opened 2) is the condition of surrounding temperature abnormal overload? 3) is there any problem as like the ...

  • Page 89

    Samsung electronics 4-39 4-4-16 eeprom error/otp error 1.Checklist : 1) is there a short around micom? 2) is there a short around ic202(pf2) or ic701(pf3)? 3) did you download or insert eeprom ic, after changing outdoor pba? 2. Troubleshooting procedure terminate the service no restart after power o...

  • Page 90

    4-40 samsung electronics 4-4-17 ac zero cross signal error 1.Checklist : 1) check the power condition at customer's house (is there any power noise?) 2) have been there power failure? 2. Troubleshooting procedure terminate the service no is the ac line zero cross signal error appeared again? Exchang...

  • Page 91

    Samsung electronics 4-41 4-4-18 operation condition secession error 1.Checklist : 1) check the temperature around the outdoor unit. 2. Troubleshooting procedure terminate the service no is the operation condition secession error appeared again? * heating mode * is the outdoor temperature over 40 °c ...

  • Page 92

    4-42 samsung electronics 4-4-19 capacity miss match error 1.Checklist : 1) check the btu between indoor and outdoor unit 2) check the indoor unit option and outdoor unit eeprom data 2. Troubleshooting procedure exchange the one of them according to the exact model spec terminate the service terminat...

  • Page 93

    Samsung electronics 4-43 4-4-20 gas leak error 1.Checklist : 1) is the position of indoor eva_in sensor normal? 2) check the pipe crack 3) check the eev valve connection in outdoor unit 4) check the refrigerant was charged 2. Troubleshooting procedure indoor sensor take the normal position check the...

  • Page 94: 5. Pcb Diagram

    Samsung electronics 5-1 5. Pcb diagram 5-1 indoor unit main pcb ■ ac012mnadch / ac018mnadch / ac024mnadch / ac030mntdch / ac036mntdch 4 5 6 7 8 10 8 11 12 13 1 2 3.

  • Page 95

    5-2 samsung electronics ① #1 : l #2 : not used #3 : n ② #1~2 : communication signal ③ #1 : dc 310v #2 : not used #3 : gnd #4 : pwm signal #5 : feedback signal ④ #1 : thermal fuse signal #2 : gnd ⑤ #1~2 : gnd #3 : spi control signal #4 : not used ⑥ #1 : dc 12v #2~5 : louver signal ⑦ #1~4 : eev signal...

  • Page 96

    Samsung electronics 5-3 ■ sub pcb 1 ① #1,#2,#19,#20:comm. Signal #3,#18:external control #4,#17:comp check #5,#16:error check #6:vcc(dc5v) #7,#14:gnd #8,#13,#15:dc12v #9~#12:comm. Signal cn1-2wires comm..

  • Page 97

    5-4 samsung electronics 5-2 outdoor unit ■ ac012kxadch main pcb no description 1 smps power: yw396-03av blu 2 4way:yw396-03av wht 3 reactor:dbt081-2p wht 4 bldc fan:yw396-06v wht 5 comm:yw396-02v red 6 sub pba power:smw200-05p blk 7 eev1:smw250-05 red 8 comp:dbt061-3p wht 9 smps: smw250-03 blu 10 ee...

  • Page 98

    Samsung electronics 5-5 q ac018jxadch main pcb 5 4 3 2 1 7 6 8 9 10 11 12.

  • Page 99

    5-6 samsung electronics ① #1-#3 : ac220v ② #1~#28 : signal to sub pcb ③ #1~#2 : olp thermistor ④ #1 : dc12v #2 : rxd #3 : txd #4 : gnd ⑤ #1~#5 : eev signal #6 : dc12v ⑥ #1 : com1(f1) #2 : com2(f2) ⑦ #1~#2 : outdoor thermistor #3~#4 : discharge thermistor #5~#6 : cond thermistor ⑧ #1~#10 : download ⑨...

  • Page 100

    Samsung electronics 5-7 q ac018jxadch sub pcb 1 2 ① #1 : dc12v #2 : gnd ② #1~#28 : signal to main pcb cn12 : dc12v cn951 : signal to main pcb.

  • Page 101

    5-8 samsung electronics 20 19 18 17 16 15 13 14 12 11 10 9 8 7 6 5 1 2 3 4 no part code local function description 1 3711-003404 cn703 base-heater yw396-03av blu 2 3711-003406 cn702 4way-1 yw396-03av yel 3 3711-003407 cn701 hotgas yw396-03av red 4 3711-000203 cn101 power yw396-03av wht 5 3711-002001...

  • Page 102

    Samsung electronics 5-9 2 3 4 6 5 8 7 1 qac024jxadch / ac030jxadch, ac036jxadch inverter pcb ① #reactor-a2 : wht #reactor-b2 : wht ② #reactor-a2 : blk #reactor-b2 : blk ③ #1 : rxd, #2 : txd #3 : gnd, #4 : dc 5v #5 : dc 12v, #6 : inv. Smps signal ④ #1 : rxd̲ataro, #2 : txd̲ataro #3, #8 : n.C, #4~#7 :...

  • Page 103

    5-10 samsung electronics qac024jxadch / ac030jxadch / ac036jxadch 3 1 2 emi pcb ① l1 : brn ② n1 : sky-blu ③ #1-#3 : ac 220~240v l1-ac power l phase n1-ac power n phase cn01-ac power.

  • Page 104: 6. Wiring Diagram

    Samsung electronics 6-1 this document can not be used without samsung’s authorization. 6. Wiring diagram 6-1 indoor unit.

  • Page 105

    6-2 samsung electronics 6-2 outdoor unit this document can not be used without samsung’s authorization. ■ ac012knldch.

  • Page 106

    Samsung electronics 6-3 this document can not be used without samsung’s authorization. Q ac018jxadch.

  • Page 107

    6-4 samsung electronics qac024jxadch / ac030jxadch / ac036jxadch this document can not be used without samsung’s authorization..

  • Page 108: 7. Preference Sheet

    Samsung electronics 7-1 7. Preference sheet 7-1 index of model name model code ※ "/" can be removed from the buyer card if there are not enough digits. Product type am dvm aj pma ac cac (usd) / asd ae ehs an vtl ak pak (packaged system) ag chr feature s general set (nasa) n indoor unit (nasa) x outd...

  • Page 109

    7-2 samsung electronics ■ condenser high temperature and high pressure gas state coolant discharged from the compressor is converted to a liquid state as it is cooled down by the heat emission in the outdoor condenser unit, and sent to the evaporator. ■ compressor low temperature and low pressure co...

  • Page 110

    This service manual is a property of samsung electronics co., ltd. Any unauthorized use of manual can be punished under applicable international and/or domestic law. © samsung electronics co., ltd. Mar. 2017. Printed in china..