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Samsung AQ18WJWB Service Manual

Other manuals for AQ18WJWB: User Manual, User Manual
Manual is about: ROOM AIR CONDITIONER

Summary of AQ18WJWB

  • Page 1

    Indoor unit aq18wjwb aq18wjwe aqt18wjwb aqt18wjwe aq24w6wb aq24w6we aqt24w6wb aqt24w6we sh18zwj sh24zw6 outdoor unit uq18wjwb uq18wjwe uqt18wjwb uqt18wjwe uq24w6wb uq24w6we uqt24w6wb uqt24w6we sh18zwjx sh24zw6x service manual contents air conditioner 1. Product specifications 2. Operating instructio...

  • Page 4

    3 samsung electronics 1-2 pressure graph db32.4 / wb24.0 db30.6 / wb22.5 db27.0 / wb19.0 db24.0 / wb17.0 db21.0 / wb15.0 indoor temp.( c) low pressure(kg/cm g) 10 8 6 4 2 0 25.0 35.0 45.0 55.0 outdoor temp.(db c) ■ 18k btu db32.4 / wb24.0 db30.6 / wb22.5 db27.0 / wb19.0 db24.0 / wb17.0 db21.0 / wb15...

  • Page 5

    Samsung electronics 4 2. Operating instructions & installation 2-1 the feature of key in remote control function button no 1 2 3 4 5 6 7 8 sleep button. The sleep timer can be used when you are cooling or heating your room to switch the air conditioner off automatically after a period of 6 hours. Fa...

  • Page 6

    5 samsung electronics the feature of key in remote control(cont.) function of key named of key no 9 10 11 12 timer set/cancel button. After setting on timer or off timer, press the button to set it completely. And press the button again to cancel on timer or off timer set. Battery life indicator. If...

  • Page 7

    Samsung electronics 6 1. Auto mode : in this mode, operation mode(cool, heat) is selected automatically by the difference between the setting and room temperature. √ √ in case of heat pump model. √ √ cooling or heating operation is selected based on difference of ts and tr. Cooling and heating opera...

  • Page 8

    Operating instructions & installation 7 samsung electronics 9. Flap : blade-h is rotated vertically by the stepping motor. *flap set : press the button under the remote control is displayed on lcd the and the blades move up and down. If the one more time press the button, blades location is stop. 10...

  • Page 9

    Samsung electronics 8 2-3 installation 2-3-1 before installation keep the air conditioner drain hose outlet and inlet free from its surroundings. In case of breakdown, keep the symmetry and fix it to prevent vibration. The pipe length shall meet the standard as far as possible. 2-3-2 installation pr...

  • Page 10

    9 samsung electronics 2-4 installation diagram of indoor unit and outdoor unit 2-4-1 air-purge procedure 1) connect each assembly pipe to the appropriate valve on the outdoor unit and tighten the flare nut. 3) open the valve of the low pressure side of manifold gauge counter-clockwise. 4) purge the ...

  • Page 11: R22

    Samsung electronics 10 operating instructions & installation 2-4-2 refrigerant refill(r22) refill an air conditioner with refrigerant when refrigerant has been leaked at installing or using. R22 suspension hook high pressure gauge hand wheel finger tight fittings connected to high pressure side char...

  • Page 12

    11 samsung electronics operating instructions & installation 2-4-3 "pump down" procedure pump down will be carried out when an evaporator is replaced or when the unit is relocated in another area. 3-way valve 2-way valve 1) remove the caps from the 2-way valve and the 3-way valve. 3) set the unit to...

  • Page 13

    Samsung electronics 12 3. Disassembly and reassembly 3-1 indoor unit stop operation of the air conditioner and remove the power cord before repairing the unit. No parts procedure remark 1 front grille 1) stop the air conditioner operation and shut off the main power. 2) open the front grille by pull...

  • Page 14

    13 samsung electronics disassembly and reassembly no parts procedure remark 2 3 control-in (main pcb) tray drain 6) unlock 3 hooks to fix panel front and tray drain. 7) unlock 3 hooks to fix panel front and back-body. 1) take all the connector of pcb upper side out. (inclusion power cord) 2) detach ...

  • Page 15

    Disassembly and reassembly samsung electronics 14 no parts procedure remark 4 5 heat exchanger fan motor & cross fan 1) loosen 2 fixing earth screws of right side. 2) detach the connection pipe. 3) detach the holder pipe at the rear side. 4) loosen the 4 fixing screws of right and left side. 5) lift...

  • Page 16

    15 samsung electronics 3-2 outdoor unit no parts procedure remark 1 common work 1) loosen the fixing screw of the cover control. 2) loosen the fixing screws on right and left, back cabinet-side edge and a fixing screw on the cabinet-front lower to detach the cabinet-front. 3) loosen the fixing screw...

  • Page 17

    Disassembly and reassembly samsung electronics 16 no parts procedure remark 2 3 4 fan & motor heat exchanger compressor 1) detach the nut flange.(turn counterclock- wise because the screw is right-handed) 2) detach the fan. 3) loosen 4 fixing screws to detach the motor. 1) loosen 3 fixing screws of ...

  • Page 18

    Disassembly and reassembly 17 samsung electronics no parts procedure remark 1 common work 1) loosen the fixing screw of the cover control. 2) loosen the fixing screws of the cabinet-upper. 3) loosen the fixing screws of the cabinet-side rh. 4) loosen the fixing screws of the cabinet-side lf. 5) loos...

  • Page 19

    Disassembly and reassembly samsung electronics 18 no parts procedure remark 2 3 4 fan & motor heat exchanger compressor 1) remove the nut flange (turn to the clockwise). 2) detach the fan. 3) loosen 4 fixing screws to detach the motor. 1) loosen 2 fixing screws on both side. 2) disassemble the pipe ...

  • Page 20

    19 samsung electronics cooling heating gas leak check polnt indoor unit outdoor unit t 1 t 2 heat exchanger (evaporator) heat exchanger (evaporator) propeller fan cross fan 2-way valve capillary tube capillary tube check valve ✳ note 3-way valve 4-way valve gas side liquid side compressor 4. Refrige...

  • Page 21

    Samsung electronics 20 4-2 refrigerant cycle characteristic 4-2-1 capacity distributions capacity distributions according to indoor and outdoor temperature variation. ■ cooling mode - indoor temp. Variation : 21.0˚c ~ 32.4˚c - outdoor temp. Variation : 25.0˚c ~ 55.0˚c cooling capacity(btu/h) 30,000 ...

  • Page 22

    Refrigerating cycle diagram 21 samsung electronics ■ heating mode - indoor temp. Variation : 15.0˚c ~ 25.0˚c - outdoor temp. Variation : 1.0˚c ~ 20.0˚c heating capacity(btu/h) 30,000 20,000 10,000 1.0/0.0 7.0/6.0 20.0/15.0 heating capacity distribution outdoor temp.(db/wb c) db25.0 db20.0 db15.0 ind...

  • Page 23

    Refrigerating cycle diagram samsung electronics 22 4-2-2 power consumption distributions power consumption distributions according to indoor and outdoor temperature variation. ■ cooling mode - indoor temp. Variation : 21.0˚c ~ 32.4˚c - outdoor temp. Variation : 25.0˚c ~ 55.0˚c power consumption(w) 4...

  • Page 24

    Refrigerating cycle diagram 23 samsung electronics ■ heating mode - indoor temp. Variation : 15.0˚c ~ 25.0˚c - outdoor temp. Variation : 1.0˚c ~ 20.0˚c power consumption(w) 1.0/0.0 7.0/6.0 20.0/15.0 power consumption distribution(heating mode) outdoor temp.(db/wb c) db25.0 db20.0 db15.0 indoor temp....

  • Page 25

    Refrigerating cycle diagram samsung electronics 24 4-2-3 capacity and power consumption distributions capacity and power consumption distributions according to the length of connecting pipe between indoor unit and outdoor unit. ■ cooling mode power consumption(w) power consumption(cooling) 4,000 3,5...

  • Page 26

    Refrigerating cycle diagram 25 samsung electronics ■ heating mode power consumption(w) power consumption(heating) 4,000 3,500 3,000 2,500 2,000 1,500 1,000 heating capacity(btu/h) length of connecting pipe(m) length of connecting pipe(m) heating capacity 30,000 20,000 10,000 5 10 15 5 10 15 power co...

  • Page 27: 5. Set Up The Model Option

    Samsung electronics 26 feature display 5. Set up the model option 5-1 setting option setup method option no. : (aqt24w6we) step 1 : enter the option setup mode. 1 st take out the batteries of remote control. 2 nd press the temperature button simultaneously and insert the battery again. 3 rd make sur...

  • Page 28

    27 samsung electronics set up the model option feature display 7 setting option seg5. Push the button to set the display panel to . Every time you push the button, the display panel reads . . . Repeatedly. 6 change it into the set display of option seg5 and seg6 with the button. 8 setting option seg...

  • Page 29

    Samsung electronics 28 set up the model option step 3 : upon completion of the selection, check you made right selections. Whenever you press the button, the set option will be displayed. Step 4 : pressing the on/off button ( ) when pressing the operation on/off key with the direction of remote cont...

  • Page 30

    29 samsung electronics 5-2 table of the option code aq18wjwb aqt18wjwb model option code seg1 seg2 seg3 seg4 seg5 seg6 seg7 seg8 seg9 seg10 6 6 0 d 5 7 0 2 2 e aq18wjwe aqt18wjwe sh18zwj 6 5 0 d 6 7 0 2 2 e aq24w6wb aqt24w6wb 6 5 2 d 4 d 0 3 6 2 aq24w6we aqt24w6we sh24zw6 6 5 4 d 5 d 0 3 5 1 db98_20...

  • Page 31: 6. Troubleshooting

    Samsung electronics 30 check the basic items first to judge if the problem was caused by breakdown or misuse. If none of the basic items are related to the problem, please scrutinize the machine according to the 'breakdown diagnosis by symptoms' method. 1. The input voltage should be rating voltage ...

  • Page 32

    31 samsung electronics 6-2 trouble check in the initial status 6-2-1 diagnosis and marking of the part in trouble. Please check the air conditioner operation status and write the check result in the chart in the room. 6-2-2 operation with abnormal motion indoor unit room temperature sensor error (op...

  • Page 33

    Samsung electronics 32 6-3 breakdown diagnosis by symptoms 6-3-1 no power (completely dead)-initial diagnosis 1. Checklist : 1) is input voltage normal? 2) is ac power linked correctly? 3) is input voltage of dc regulator ic ka7805 (ic02) normal? (11vdc-12.5vdc) 4) is output voltage of dc regulator ...

  • Page 34

    33 samsung electronics troubleshooting test rod location + - ss71- ss71- 12v normal voltage 6-3-2 when the indoor unit fan does not operate. (initial diagnosis) 1. Checklist : 1) is the indoor unit fan motor properly connected with the connector (cn72)? 2) is the ac voltage correct? 3) is hall ic in...

  • Page 35

    Samsung electronics 34 troubleshooting test rod location + condition - ic04 pin no.38 ry71 on gnd dc4.8v normal voltage 6-3-3 when the outdoor unit does not operate. (initial diagnosis) 1. Checklist : 1) is input voltage normal? 2) is the set temperature of the remote control higher than room temper...

  • Page 36

    35 samsung electronics troubleshooting 6-3-4 when the up/down louver motor 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. Troubleshooting procedure yes no yes yes remove power cord and p...

  • Page 37

    Samsung electronics 36 troubleshooting 6-3-5 in the heat mode, when there is no warm air current. Check this fist; 1) is the set temperature of remote control lower than room temperature in heat mode? 2) is the indoor pcb properly connected with the cn71 connector? No yes yes yes after training on, ...

  • Page 38

    37 samsung electronics troubleshooting 6-3-6 room temperature sensor failure no ass'y sensor replace sensor resistance value : 20˚c-12.09k Ω sensor resistance value : 30˚c-8.31k Ω sensor resistance value : 35˚c-6.94k Ω sensor resistance value : 40˚c-5.83k Ω yes no no detach the assembly sensor from ...

  • Page 39

    Samsung electronics 38 troubleshooting 6-3-7 room pipe sensor failure 1. Check the assembly condition of the sensor connector(cn43) on the indoor unit main pcb and if not assembled, reassemble the connector accurately. 2. Detach the room pipe sensor connector(cn43) and check the resistance between c...

  • Page 40

    39 samsung electronics 6-4 pcb inspection method 6-4-1 pre-inspection notices 1. Check if you pulled out the ac power plug when you eliminate the pcb or front panel. 2. Don't hold the pcb side not impose excessive force on it to eliminate the pcb. 3. Don't pull the lead wire but hold the whole housi...

  • Page 41

    Samsung electronics 40 troubleshooting temperature [˚c] sensor resistance [kohm] temperature [˚c] sensor resistance [kohm] temperature [˚c] sensor resistance [kohm] temperature [˚c] sensor resistance [kohm] 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 50 2.229 2.296 2.365 2.437 2.512 ...

  • Page 42

    41 samsung electronics 6-5 main part inspection method room temperature sensor room fan motor outdoor fan motor stepping motor measure resistance with a tester normal at the normal temperature 37k Ω ~ 8.3k Ω (-7˚c~+30˚c) *refer to table 6-4-4. Abnormal ∞ , 0 Ω . . . Open or short measure the resista...

  • Page 43

    Samsung electronics 42 1 6 1-2 1-1 16 2-3 2-2 3-7 10 11 13 4 9 7 2-1 2 5-1 5-4 5-2 5 3 8 14 15 5-3 3-4 3-6 3-8 12 3-1 3-2 3-5 3-3 you can search for the updated part code number through the itself. Url : http://itself.Sec.Samsung.Co.Kr 7. Exploded views and parts list 7-1 indoor unit db98_20874a(1)_...

  • Page 44

    43 samsung electronics exploded views and parts list ■ parts list q'ty no. Code no. Description specification 1 db94-00615a ass'y back body ass'y 1 1 1 1-1 db61-01974a body back hips 1 1 1 1-2 db69-01039a cushion-back body fo-ps 1 1 1 2 db96-03913a ass'y cycle in ass'y 1 1 - db96-03809a ass'y cycle ...

  • Page 45

    Exploded views and parts list samsung electronics 44 ■ parts list q'ty no. Code no. Description specification 1 db94-00615a ass'y back body ass'y 1 1 1 1-1 db61-01974a body back hips 1 1 1 1-2 db69-01039a cushion-back body fo-ps 1 1 1 2 db96-03913a ass'y cycle in ass'y - 1 - db96-03809a ass'y cycle ...

  • Page 46

    M e m o 45 samsung electronics db98_20874a(1)_1 05/1/28 4:03 am page 45.

  • Page 47

    Samsung electronics 46 7-2 outdoor unit 3-1 3-2 16 20 10 5 8 18 11 12 13 6 3 1 7 15 17 19 4 9 2 14 14-2 14-4 14-3 14-1 ■ 18k btu db98_20874a(1)_1 05/1/28 4:03 am page 46.

  • Page 48

    47 samsung electronics exploded views and parts list ■ parts list q'ty no. Code no. Description specification 1 db90-01711a ass'y-cabi front ass'y 1 1 2 db63-00847a guard fan hips 1 1 3 db90-01713a ass'y-cabi side lf ass'y 1 1 3-1 db64-00982a cabinet-side lf secc-p 1 1 3-2 db64-00992a handle-lf pp 1...

  • Page 49

    Samsung electronics 48 exploded views and parts list 14 3 2 1 11 7 16 8 15-1 15-2 15-3 15 15-4 12 13 17 18 10 9 4 5 6 ■ 24k btu db98_20874a(1)_1 05/1/28 4:03 am page 48.

  • Page 50

    49 samsung electronics exploded views and parts list ■ parts list q'ty no. Code no. Description specification 1 db90-01146c ass'y-cabi front ass'y 1 1 2 db90-00970j ass'y base out-part ass'y 1 1 3 db67-00142a fan-propeller as+gf20% 1 1 4 db60-30020a nut-flange m6 1 1 5 db31-00264d motor fan ydk95-60...

  • Page 51

    Samsung electronics 50 db93-02829c ■ parts list no. 1 2 3 4 5 6 7 8 9 10 11 12 description code no. Case-control ass'y terminal block ass'y main pcb ass'y-s/w & display pcb plate-terminal low holder-wire clamp screw-machine screw-machine ass'y-c/w display pcb c/w step motor up/down ass'y-thermistor ...

  • Page 52: 8. Block Diagram

    51 samsung electronics 8. Block diagram heat exchanger sensor operation timer turbo indoor fan motor buzzer compressor outdoor fan motor 4-way valve(*) stepping motor : blade up/down display part ic-mcu room temperature sensor controller remote control infrared signal reset circuit oscillation circu...

  • Page 53: 9. Wiring Diagram

    Samsung electronics 52 9. Wiring diagram 9-1 indoor unit this document can not be used without samsung's authorization. Code no : db68-02811a ■ 18k btu db98_20874a(1)_1 05/1/28 4:03 am page 52.

  • Page 54

    53 samsung electronics wiring diagram this document can not be used without samsung's authorization. Code no : db98-20290a ■ 24k btu db98_20874a(1)_1 05/1/28 4:03 am page 53.

  • Page 55

    Samsung electronics 54 this document can not be used without samsung's authorization. 9-2 outdoor unit ■ 18k btu mark name mark name 20s solenoid coil fm fan motor mark name mark name 20s solenoid coil fm fan motor ■ 24k btu code no : db98-20291a code no : db68-02812a db98_20874a(1)_1 05/1/28 4:03 a...

  • Page 56

    M e m o 55 samsung electronics db98_20874a(1)_1 05/1/28 4:03 am page 55.

  • Page 57

    M e m o samsung electronics 56 db98_20874a(1)_1 05/1/28 4:03 am page 56.

  • Page 58

    Electronics 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. Jan. 2005. Printed in korea. Code no. Db98-20874a(1) db98_20874a(1)_co 05/1/28 4:11 am pag...