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Samsung UD18B1C2 manual

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Table of contents for the manual

  • Page 1

    SERVICE Manual CONTENTS AIR CONDITIONER 1. Installation 2. Disassembly and Reassembly 3. T roubleshooting 4. Exploded Views and Parts List 5. Refrigerating Cycle Block Diagrams 6. Wiring Diagrams 7. Schematic Diagrams ROOM AIR CONDITIONER INDOOR UNIT AD26B1C13 AD18B1C09 OUTDOOR UNIT UD26B1C2 UD18B1C2 E DB98-05645A(1) DB98_05645A(1)-co 5/30/02 7:03 [...]

  • Page 2

    1 1. Installation 1-1 Refrigerant Refill Procedure INDOOR A-UNIT INDOOR B-UNIT • Piping length and the height Additional refrigerant char ge (R22,g) • When length of the pipe is over 5u by the unit, you should charge the refrigerant Formulas A-UNIT : 20gx(L a -5)/m B-UNIT : 20gx(L b -5)/m (La:the length of A-unit’s pipe L b :the length of B-u[...]

  • Page 3

    2 1-2 “Pump down” Procedure Relocation of the air conditioner 1. Carry out the pump down procedur e (refer to the details of ‘pump down’). 2. Remove the power cord. 3. Disconnect the assembly cable from the indoor and outdoor units. 4. Remove the flare nut connecting the indoor unit and the pipe. At this time, cover the pipe of the indoor u[...]

  • Page 4

    3 2. Disassembly and Reassembly 2-1 Indoor Unit Stop operation of the air conditioner and remove the power cable befor e repairing the unit. No Parts Procedure Remark Front Grille 1 1) Stop the air conditioner operation and block the main power . 2) Separate tape of front panel upper . 3) Contract the second finger to the left, and right handle and[...]

  • Page 5

    4 No Parts Procedure Remark Electrical Parts (Main PCB) Ass’y T ray Drain. Heat Exchanger Fan Motor and Cross Fan 2 3 4 5 1) Do “1”above. 2) T ake all the connector of PCB upper side out. (Inclusion Power cord) 3) Separate the outdoor unit connection wire from the terminal block. 4) If pulling the Main PCB up. it will be taken out. 1) Do “1[...]

  • Page 6

    5 2-2 Outdoor Unit No Parts Procedure Remark Cabinet Fan Motor & Propeller Fan 1) T urn off the unit and remove the power cable. 2) Remove the top cover . 3) Remove the control box cover . 4) Unplug the ass'y cable. 5) Remove the cabi-side. 6) Remove the cabi-front. * When you assemble the parts, check if the each parts and electric connec[...]

  • Page 7

    6 1) The input voltage should be rating voltage ± 10% range. The airconditioner may not operate pr operly if the voltage is out of this range. 2) Is the link cable linking the indoor unit and the outdoor unit linked pr operly? The indoor unit and the outdoor unit shall be linked by 5 cables. Check the terminals if the indoor unit and outdoor unit [...]

  • Page 8

    7 Display Standard T imer Nature Power (GREEN) X (GREEN) X X (GREEN) (GREEN) X X X X X X X X X X X X X Restore from power failure (input initial power) Indoor unit Room sensor Error (open or short) Indoor unit heat exchanger temperature sensor Error (open or short) Indoor fan malfunctioning (for speed is below 450rpm) In case that the communication[...]

  • Page 9

    8 3-2 Checking and T esting Operations (Outdoor Unit) T o complete the installation, perform the following checks and tests to ensur e that the air conditioner is operating correctly . 1. Review all the following elements in the installation: • Installation site strength • Piping connection tightness to detect any gas leakages • Connection wi[...]

  • Page 10

    9 4. Check the test operation status by pressing the PCB switch 4. S/W -A and S/W -B of outdoor unit. 4. • Check the operation status by pushing the switch one at time. 4. • Perform the test operation only for the unit selected last. 4. • Check the pipe pressur e and the other operation status during the test operation. 4. • Check items whe[...]

  • Page 11

    10 DISPLA Y EXPLANA TION Outdoor sensor error (Short/Open) Outdoor A cond pipe sensor error (Short/Open) Outdoor B cond pipe sensor error (Short/Open) Outdoor C cond pipe sensor error (Short/Open) A unit test operation error B unit test operation error C unit test operation error A unit test communication error B unit test communication error C uni[...]

  • Page 12

    11 3-3 Fault Diagnosis by Symptom 3-3-1 No Power (completely dead)-Initial diagnosis 1) Checklist : (1) Is input voltage normal? (2) Is AC power linked correctly? (3) Is output voltage of DC regulator IC KA7805 (IC02) normal? (4.5VDC-5.5VDC) 2) T r oubleshooting procedur e Replace PCB display Is DC voltage of PCB display normal? Remove power cord a[...]

  • Page 13

    12 3-3-2 When the power voltage is not available 1) Inspection items (1) Is the power voltage is normal? (The rating voltage ± 10% range) (2) Is the power cord is corr ectly connected and is the contact good? (3) Does the sound “ting” come out with the operation lamp (green) flickering when the power is applied? If it is not flickering, do ins[...]

  • Page 14

    13 3-3-3 No Power (Outdoor unit) 1) Inspection items (1) Á Is the power source normal (The rating V oltage ± 10% range)? (2) Is the outdoor power connected normally? ((1) of terminal : L, (2) of terminal : N, (3) of terminal : communication) ? (3) Check whether the display of outdoor PCB(SEG1) is shown in the order of A- B - C when the power is a[...]

  • Page 15

    14 3-3-4 When the fan of indoor unit does not operate 1) Inspection items (1) Is the power voltage normal? (2) Is the connector of indoor fan with the good contact? (CN73) (3) Is the soldering status of running condenser (CR71) with the good contact? (4) Is connector of the Hall IC with the good contact (CN 43) ? (5) Is the indoor fan rotating when[...]

  • Page 16

    15 3-3-5 When the outdoor unit fan does not operate 1) Inspection items (1) The outdoor unit fan motor operates only when the operating conditions are satisfied and is selected by the R Y74(LOW) and PY75(HI) to rotate. (2) Is the power voltage normal? (3) Is the contact of outdoor unit fan motor (CN 73) good? (4) Is the winding resistance of outdoo[...]

  • Page 17

    16 3-3-6 When the UP/DOWN Louver Moter Does Not Operate. (Initial Diagnosis) 1) Checklist : (1) Is input voltage normal? (2) Is the UP/DOWN louver motor properly connected with the connector (CN61)? 2) T roubleshooting pr ocedure Remove power cord and plug in again in approx. 5 seconds. Is operating lamp blinking? Does operation start when swing bu[...]

  • Page 18

    17 3-3-7 If Operation By Remote Control Unit Is Impossible. (Initial Diagnosis) 1) T r oubleshooting procedur e Remove power cord and plug in again approx. 5 Seconds Is operation lamp blinking? Check as in the procedure “NO Power parts”. Refer to page 11. Normal Replace battery . LCD is faulty . Replace button. Micom is faulty . Receiver module[...]

  • Page 19

    18 3-3-8 When the 4 way valve (A,B) is not operating 1) Inspection items (1) Are the 4 way valve A and B under the operating conditions? (When the COMP A (4 way valve A ) and COMP B (4 way valve B) ar e on during the heating operating) (2) Is the power voltage normal? (3) Is the connecting of 4 way valve A (CN 75) and B (CN 76) good? 2) Inspection [...]

  • Page 20

    19 3-3-9 When the compressor does not operate 1) Inspection items (1) Is the COMP A under the operating conditions? (cooling operating of A, B(C) r oom) (2) Is the power voltage normal? (the rating voltage ± 10% range) (3) Are the connector connection of COMP A(RY 72, 73) and B(R Y 71) good? (4) The COMP A(B) is operated on and off in accordance w[...]

  • Page 21

    20 3-4 Set up the Model option • It is necessary to set up option code after replacing the main-PCB as a service parts. Make sure that you can set up the option of code the r emote controller after you replace the main PBA otherwise, the unit won’t be working pr operly and all LED lamps on display will be flickering. Step 1 : Preparing the remo[...]

  • Page 22

    21 ! If the first number is , it is correct otherwise pr ess until appear . @ When pressing the button ~ appear on the display , select one of them. # When pressing the button ~ appear on the display , select one of them. $ When pressing the button ~ appear on the display , select one of them. % When pressing the button ~ appear on the display , se[...]

  • Page 23

    22 <T able of the option code> MODEL AD26B1C13 AD18B1C09 OPTION CODE 015773-100373 015223-10020C DB98_05645A(1)_1 5/30/02 7:05 PM Page 22[...]

  • Page 24

    23 MEMO DB98_05645A(1)_1 5/30/02 7:05 PM Page 23[...]

  • Page 25

    24 4. Exploded V iews and Parts List 4-1 Indoor Unit 17 16 14 22 9 7 21 3 4 5 6 19 20 8 12 25 13-4 23 13-3 13-2 13 13-1 11 10 2 1 15 18-1 18-5 18-4 18 18-6 18-6-1 18-2 18-3 24 DB98-05645A(1)-2 5/30/02 7:06 PM Page 24[...]

  • Page 26

    25 Q’TY ■ Parts List CODE NO No. Description REMARK AD18B1C09 AD26B1C13 1 2 3 4 5 6 7 8 9 10 11 12 13 13-1 13-2 13-3 13-3-1 13-3-2 13-4 14 15 16 17 18 18-1 18-2 18-3 18-4 18-5 18-6 18-6-1 19 20 21 22 23 24 25 DB64-00085A DB63-00064B DB95-00287K DB63-00067A DB92-00031L DB67-00051A DB67-00032A DB63-00083A DB94-00020A DB60-2001 1A DB31-00071B DB32[...]

  • Page 27

    26 4-2 Outdoor Unit 4-2-1 UD26B1C2 12 15 8 17 3 4 5 7 6 9(9-1~9-2) 14(14-1~14-4) 2 1 10 13(13-1~13-6) 16(16-1~16-7) 11 DB98-05645A(1)-2 5/30/02 7:06 PM Page 26[...]

  • Page 28

    27 Q’TY ■ Parts List CODE NO No. Description Specification REMARK UD26B1C2 1 2 3 4 5 6 7 8 9 9-1 9-2 10 11 12 13 13-1 13-2 13-3 13-4 13-5 13-6 14 14-1 14-2 14-3 14-3-1 14-4 14-4-1 15 16 16-1 16-2 16-3 16-4 16-5 16-6 16-7 17 DB90-00075D DB90-20207A DB67-50067A DB31-00095A DB61-20093A DB63-30027C DB94-50041D DB90-10574B DB90-40120B DB63-10434B DB[...]

  • Page 29

    28 4-2-2 UD18B1C2 15 16(16-1~16-7) 13(13-1~13-6) 14(14-1~14-4) 9 3 1 10 4 6 5 7 8 2 11 17 12 DB98-05645A(1)-2 5/30/02 7:06 PM Page 28[...]

  • Page 30

    29 Q’TY ■ Parts List CODE NO No. Description Specification REMARK UD18B1C2 1 1-1 2 3 4 5 6 7 8 9 10 11 12 13 13-1 13-2 13-3 13-4 13-5 13-6 14 14-1 14-2 14-3 14-3-1 14-4 14-4-1 15 16 16-1 16-2 16-3 16-4 16-5 16-6 16-7 17 DB90-00734A DB63-00320A DB90-00733A DB67-50063A DB31-00001A DB61-20008C DB63-00343A DB94-00180A DB90-00737B DB90-40176B DB90-0[...]

  • Page 31

    30 4-3 ASS’Y CONTROL IN (DB93-01223A) ■ Parts List No 1 2 3 4 5 6 7 8 9 10 11 Description HOLDER CONTROL ASS’Y MAIN PCB TERMINAL BLOCK ASSY ASSY DISPLA Y PCB CONNECTOR WIRE PCB U/D HOLDER CLAMP IN SEAL CONTROL SIDE SEAL H/CONTROL FRONT SCREW MACHINE LABEL CORE Specification DB61-00160B DB93-00319B DB65-00046A DB93-00268A DB39-00147A DB61-0021[...]

  • Page 32

    31 5. Refrigerating Cycle Block Diagram Refrigerating cycle temperature and pressure STD Pressure Piping T emp.(°F) T emp. Condition (°F) Operating Condition (psi) T1 T2 Indoor Outdoor 3-W A Y V/V DB WB DB WB Standard 57-71 50-54 50-54 80 67 95 75 Cooling Max over load - 61-64 61-64 80 67 115 75 Low temp. - 34-39 34-39 67 57 67 57 Standard 242-28[...]

  • Page 33

    32 6. Wiring Diagrams 6-1 Indoor Unit DB98-05645A(1)-2 5/30/02 7:06 PM Page 32[...]

  • Page 34

    33 6-2 Outdoor Unit DB98-05645A(1)-2 5/30/02 7:06 PM Page 33[...]

  • Page 35

    7. Schematic Diagrams 7-1 Indoor Unit ■ AS07A5(6)MA / AS09A5(6)MA 34 35[...]

  • Page 36

    37 36 7-2 Outdoor Unit ■ AS07A5(6)MA / AS09A5(6)MA[...]

  • Page 37

    ELECTRONICS Printed in Korea. DB98_05645A(1)-co 5/30/02 7:50 PM Page 2[...]