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Daewoo DSB-070L Service Manual

Summary of DSB-070L

  • Page 1

    Service manual split system air conditioner model: dsb-070l dsb-091l dsb-121l daewoo electronics co., ltd. ✔ caution : in this manual, some parts can be changed for improving, their performance without notice in the parts list. So, if you need the latest parts information,please refer to ppl(parts p...

  • Page 2: Contents

    Contents 1. Specifications ..........................................................................................................2 2. Outline and dimensions .........................................................................................5 3. Operation.......................................

  • Page 3: 1. Specifications

    2 1. Specifications model dsb-070l item function cooling class t power ac 220-240v / 50hz capacity w 2,051 btu/h 7,000 dehumidification l/h 0.89 running current a 2.9 power input w 680 starting current a 18 type rotary model qb 125pl 12b capacitor 25µf/370vac indoor unit outdoor unit type cross flow...

  • Page 4

    3 model dsb-091l item function cooling class t power ac 220-240v / 50hz capacity w 2,637 btu/h 9,000 dehumidification l/h 1.15 running current a 4.2 power input w 920 starting current a 21 type rotary model rbb090a001 qk 164pn12f capacitor 25µf / 370vac 30µf / 370vac indoor unit outdoor unit type cr...

  • Page 5

    4 model dsb-121l item function cooling class t power ac 220-240v / 50hz capacity w 3,507 btu/h 12,000 dehumidification l/h 1.53 running current a 5.7 power input w 1,250 starting current a 34 type rotary model rcb 120a001 capacitor 25µf / 400vac division indoor unit outdoor unit type cross flow fan ...

  • Page 6: 2. Outline and Dimensions

    5 750 plate mounting remocon connecting pipe grille insert 245 remote controller frame grille body plate mounting 174 2. Outline and dimensions 1 indoor unit ¡ dsb-070l/dsb-091l.

  • Page 7

    6 remocon filter - l filter - r grille insert frame grille body plate mounting connecting pipe plate mounting 406 194 285 925 remote controller ¡ dsb-121l.

  • Page 8: Outdoor Unit

    7 256 549 654 2 outdoor unit ¡ dsb-070l/dsb-091l/dsb-121l(after) inlet inlet outlet outlet foot foot cushion handle cabinet side panel top guide support service valve cabinet front.

  • Page 9

    8 cabinet side handle cabinet front foot 264 334 panel top cabinet back 552 572 inlet air inlet outlet foot cushion service valve 666 ¡ dsb-121l(before).

  • Page 10: Parts of Name and Function

    9 1 parts of name and function indoor unit 3. Operation ¡ dsb-070l/dsb-091l remote controller electrostatic filter (option) deodorizing filter (option) air inlet remote controller receiver power plug remote controller fan direction (up, down) air outlet antibacterial filter lamp.

  • Page 11: Indoor Unit

    10 indoor unit ¡ dsb-121l power plug ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,...

  • Page 12: Indoor Unit Display

    11 ¡ dsb-070l/dsb-091l ■ remote control signal receiver this place is the part to receive the signal if it receive the signal, you can hear the signal “beep. “beep. Beep.” ■ there is a switch panel at inside of front panel. At the time of operating, open the front panel. Emergency switch can be used...

  • Page 13: Indoor Unit Display

    12 ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, ,,,,,,,,,,,,,,,,,,,,,,...

  • Page 14: Outdoor Unit

    13 outdoor unit ¡ dsb-070l/dsb-091l/dsb-121l(after) air inlet (side back) connection wire connecting pipe drain hose air outlet.

  • Page 15: Outdoor Unit

    14 air air inlet (side back) air outlet connection wire connecting pipe drain hose outdoor unit ¡ dsb-121l(before) note: how to remove top panel 1. Loosen the screw at left and right side. 2. Push the three parts op front and back sides like figure orderly. 3. Unhook the locking parts of top panel. ...

  • Page 16: Outdoor Unit

    14 air air inlet (side back) air outlet connection wire connecting pipe drain hose outdoor unit ¡ dsb-121l(before) note: how to remove top panel 1. Loosen the screw at left and right side. 2. Push the three parts op front and back sides like figure orderly. 3. Unhook the locking parts of top panel. ...

  • Page 17: Name of Each Button

    15 name of each button 2 remote controller ¡ dsb-070l/dsb-091l/dsb-121l mode sleep on/off timer enter/ cancel fan speed turbo/mild display displays information pertaining to unit. Turbo/mild press to be colder the unit. Timer enter/cancel button press to enter a timer setting or to cancel timer sett...

  • Page 18: Replacing Batteries

    16 replacing batteries 3 remote controller display open the cover after pressing the arrow direction and pulling out. Put the drycell by ● ● + ● ● - direction. Close the cover after pushing into arrow direction. 1 2 3 remote controller + – + – remote controller ¡ dsb-070l/dsb-091l/dsb-121l mode indi...

  • Page 19: Off-Timer

    17 if you set time in off-timer mode, the unit will stop at the set time. If you set time in on-timer mode, the unit will run at the set time. (1) range of setting temperature: 18~32°c (2) setting temperature: operating temperature of compressor if the indoor unit display receive the signal of remot...

  • Page 20: Sleep Mode

    18 (1) when you are going to sleep, select sleep switch and the unit controls the room to the desired temperature. (the unit will not operate after 4 hour) (2) for changing the temperature. Sleep mode 0 0.5 1.0 hour set time desired difference desired temperature between room temperature ( ° c) 0.5 ...

  • Page 21: Emergency Operation

    19 (1) when the remote controller is lost, damaged or the battery is discharged, the emergency operation can be used to run the unit. (2) the setting conditions of emergency operation are as follows. • operation mode: auto • preset temperature: 26°c • fan speed: low ¡ you cannot operate with remote ...

  • Page 22: Dehumidification Mode

    20 dehumidification mode air discharge direction(only remocon operation) the air discharge direction procedure is below. Fixed up/down fixed up/down auto mode i (1) when the room temperature is higher than 28°c (cooling mode) ! Compressor and lndoor fan @ the fan will automatically operate as follow...

  • Page 23: Quick Mode(Powerful Cooling)

    21 ! Fan speed: super high speed @ air discharge direction: fixed # set temperature: 18°c fixed (cooling) $ compressor and outdoor fan the air discharge direction procedure is below fixed up/down fixed up/down ƒr the option is left/right direction. Quick mode(powerful cooling) -1 off on (room temper...

  • Page 24: 4. Wiring Diagram

    22 4. Wiring diagram ¡ dsb-070l/dsb-091l/dsb-121l outdoor unit indoor unit fan motor brn blue blu blu comp blu brn brn yel/grn yel/grn brown yellow/green brn brn blu power cord blk yel/grn capacitor outdoor terminal block yel red s c r compressor fan herm c 1 1 blk blk red red blu org red blk red pi...

  • Page 25: Main Electric Parts

    23 ¡ dsb-070l ¡ dsb-091l 1 main electric parts part name part code spec. Quantity remark fan motor idu 3108003800 ic-8417dwkf5a 1 fan motor capacitor 3106900300 1.0µf 400vac 1 fuse 5fvlb3152l 250v 3.15a 1 transformer 5epv050120 230v 50hz 1 stepping motor 3108003900 gsp-24sw-061 1 terminal block 3108...

  • Page 26: 5. Refrigerant Cycle

    24 5. Refrigerant cycle indoor unit evaporator cross flow fan connecting pipe capillary tube dryer condenser propeller fan outdoor unit refrigerant flow service valve service valve accumulator compressor note) if the pipe length exceeds the standard length, add 30g of refrigerant per extra meter. Co...

  • Page 27: 6. Control Block Diagram

    25 6. Control block diagram relay rl1 stepping motor indoor fan motor compressor outdoor fan motor triac dc12v operating mode fan speed timer selection flap position unit on lamp room air temp. Indoor coil temp. Air clean lamp quick lamp remote emergency operation signal receiver timer lamp a/d conv...

  • Page 28: 7. Electric Circuit Diagram

    26 2 1 3 i.D.C s r swing motor room air sensor remote controller trans- former rl1 comp. Relay triac overload pro- tector compressor outdoor unit fan motor terminal block n l indoor coil sensor display part control part signal receiver fmc cmc y l indoor unit fan motor 7. Electric circuit diagram ¡ ...

  • Page 29: Description

    27 description 1. After the power on/off button is pressed once, the relay and triac are turned on or off per the remote control setpoint. – triac is controlled per the fan speed selection. – relay is controlled per the operation mode selection. 2. If the power on/off button is pressed once more, th...

  • Page 30: 8. Trouble Shooting

    2 8. Trouble shooting outdoor unit does not run?(note. 1) does the compressor run normally? Indoor unit does not run(note 1) check the failure code according to the self diagnostic (note 2) is the unit display mormal? Check the failure code according to the self-diagonostic (note 2) normal check the...

  • Page 31

    8 le ower o the e rmal? Ge between rminal k er on/off te controller he ep two ? Splay ? Ctor on display o control pcb ay pcb itself check power supply mains or interconnection wires check the wiring of indoor is the switch position on switch pannel at "remote" does control pcb status led repeat one ...

  • Page 32: Self-Diagnostic Function

    30 note 1) ! Neither indoor unit nor outdoor unit runs. Check the following points first. (there are following case in normal operation) a. Is the timer mode set the "timer on". B. Is the timer mode set the "timer-off" and the time had passed? @ neither outdoor fan nor compressor runs while indoor f...

  • Page 33

    31 confirm following statement. When the unit operate normally, sometimes the outdoor unit and indoor unit cannot operate. ! Check the function select switch. Is it timer mode? @ the function select switch locate the sleep mode and is the setting time over? # is the setting mode dehumidifier mode? $...

  • Page 34

    32 check rotation of indoor fan rotate indoor fan by hand check input voltage of fan motor connector at power p.C.B check the winding resistance of indoor unit fan motor check the fan motor capacitor check the connecting wire of indoor fan motor run again check the starting of indoor fan motor run a...

  • Page 35

    33 confirm following statement. When the unit operate normally, sometimes the outdoor unit and indoor unit cannot operate. ! Is the setting temperature proper? @ is the unit during 3min. Time delay of compressor. # during frost prevention of lndoor unit. $ during dehumidifier mode. Outdoor fan and c...

  • Page 36: Only Compressor Do Not Run

    34 - check the following at cooling mode check the voltge between and of indoor unit terminal y l check the voltge between and of outdoor unit terminal y l check the magnetic contactor check the wiring of outdoor unit check the compressor (check the winding resistance) check the compressor capacitor...

  • Page 37: Pcb Driving Description

    Pcb driving description.

  • Page 38: Pcb Circuit Diagram

    3 1 pcb circuit diagram short skip heat 50hz js6 js4 js3 open detect cool 60hz js1 short open 070 091 js2 short open short 121 open p77(hso) p76(hsck) p75(so) p74(si) p73(sck) p72(pdo/pwm) p71(int4) p70(int3/tc3) p07 p06 p05 p04 p03 p02 p01 p00 test reset xin xout (vass)vss vdd (xtout)p22 (xtin)p21 ...

  • Page 39

    35 cc3 104 ce2 cc2 104 35v 1000 µ f cc8 104 test mild/high r29 js3 50/60hz js4 heat/cool 03j 16 15 14 13 12 11 10 9 + + 7805 ic3 7812 ic2 470 µ f 25v power freo. 1k r27 tr1 c102m 10k r3 d3 d2 d1 cn6 cn2 trans ac 220v cn1 var t1 sm3jz47 l1 130 µ h 3a tlp561 pt1 r5 1k 1/2w rl1 r1 100 sn1 0.1 µ f 120 o...

  • Page 40: Power Supply(1)

    36 power supply(1) description dc power supply in circuit needs +12v and +5v. +12v is used for compressor driving relay, triac driving photo triac, buzzer driving swing, sweep motor. Ac voltage of secondary power transformer is rectified by bridge diode, and it is filtering by main condensor ce1. Fi...

  • Page 41: Sensor(3)

    37 room temperature and evaporator temperature sensor input description number 24, 25 of micom is terminal of a/d convertor input. Room temperature and evaporator temperature is sensing by change of thermister resistance, micom is put in 5v by ratio between r10 (12.7k Ω ) and r11 (12.7k Ω ). Relatio...

  • Page 42: Triac Driving(4)

    38 triac driving(4) description number 38 terminal of micom is put out pulse output, by way of buffer it is driving photo triac is supplied trigger signal. Trigger test of triac is detected zero cross part of ac input and it is triggered from zero cross part to time delay part according to fan speed...

  • Page 43: Remote Controller(5)

    39 description signal from remote controller put in only control data signal at micom terminal of number 33, which is gotten fid of carrier (38khz) from receive module. Signal wave repeat third as following fig 5-1. But in secondary wave custom code is reversed face. Leader code custom code data cod...

  • Page 44: Micom Power Supply(7)

    40 description micom power is supplied 5v at number 42 using vdd, number 19, 20 vsing oscillator, cc13 is noise filter. Micom power supply(7) vdd 42 ce5 10 µ f 16v cc11 104 cc13 104 + 5v 41 40 39 22 21 19 osc 8mhz 20 vss micom.

  • Page 45: Reset(8)

    41 description voltage less than about 0.8v put in micom terminal of number 18 and then micom reset. Reset ic detect power on and voltage less than 4.25v, and then send reset signal. Reset(8) micom 18 cc9 103 r12 1k + ce4 4.7 µ f 50v ic5 7042p r13 5.6k 5v 4.25v h l t t power on vcc (+5v) delay time ...

  • Page 46: Buzzer Driving(10)

    42 description micom 34 terminal put out buzzer driving pulse, its output is driving buzzer through buffer. Ocillatory frequency of buzzer is selected by internal micom. This unit is setting at 4khz. Vcc 12v kid 65004 micom 34 6 11 r4 1k bz1 buzzer driving(10) description selecting function is as fo...

  • Page 47: Zero Crossing Detect(11)

    43 description it defect zero cross part of trans output voltage, transistor tr1 is used to put in the micom. Detail driving is as following fig 11-1. R19 is resistance to limit current. Micom trans output d5 d6 r2 5.6k 1 2 cc4 103 tr1 krc120m 1 2 1 2 3 2 1 r3 10k r27 1k vcc 31 detect point h the nu...

  • Page 48: Stepping Motor Driving(12)

    44 description there are one stepping motor for flap (up and down) and it is used 4 face drive method. It is driving as following fig 12-1. (ring count method of 8 status) Ø 4 Ø 3 Ø 2 Ø 1 b+ 6 5 4 3 2 1 12v ic6 kid65004 cn13 1 micom 2 3 4 m1 for swing Ø 4 Ø 3 Ø 2 Ø 1 fig 12-1 (normal rotating) (reve...

  • Page 49

    Error no error no error no no no no yes select on/off button select mode button select fan speed button select fan dir. Button power supply test start power supply again check the following battery spring micom pcb lcd is display at the beginning on? Is display at the beginning on? Is it normal? Is ...

  • Page 50

    46 (0.5~24 hour) error no select timer on button select timer enter button select cancel button select on/off button select off (timer) button select sleep button select sleep button test ok! Is lcd display off? Is it normal display? Timer is all display off? Is it normal? Sleep mode display on? Is ...

  • Page 51: (1) U1 (Micom)

    47 (1) u1 (micom) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 vdd (xtout)p22 (xtin)p21 (int5/stop)p20 p17 p16 (tc2)p15 (ppg)p14 (dvo)p13 (int2/tc1)p12 (int1)p11 (into)p10 (ain7)p67 (ain6)p66 (ain5)p65 (ain4)p64 (ain3)p63 (ain2)p62 (ain1)p61 (ain0)p60 varef p77(hso) p76(hsck) p75(so) p74(si...

  • Page 52

    48 (2) u2, 4 (kid65004) darlington arrays (3) u8 (kia7805p) : voltage regulator (5vdc) (4) u7 (kia7812p) : voltage regulator (12vdc) in1 1 16 out 1 in2 2 15 out 2 in 3 3 14 out 3 in 4 4 13 out 4 in5 5 12 out 5 in6 6 11 out 6 in7 7 10 out 7 gnd 8 9 common free wheeling diodes common 10.5k ‰ 7.2k ‰ 3k...

  • Page 53: (5) U9 (Kia7042P) : Reset Ic

    49 (5) u9 (kia7042p) : reset ic kia70 42p outline input ground output vcc 1 3 2 out gnd.

  • Page 54: Indoor Unit

    50 1 indoor unit procedures photos 1. Stop the air conditioner and disconnect the power cord from the wall outlet. 2. Removing the insert grille and frame grille. (fig 1~2) ! Draw up the insert grille and remove it. @ loosen one screw for fixing the cover ter-block. # loosen two screw at the frame g...

  • Page 55

    51 procedures photos 1. Stop the air conditioner and disconnect the power cord from the wall outlet. 2. Removing the insert grille and frame grille. (fig 1~2) ! Draw up the insert grille and remove it. @ loosen two special screw for fixing the cover ter-block. # loosen three screw at the body. $ rem...

  • Page 56: Outdoor Unit

    52 2 outdoor unit ¡ dsb-070l/dsb-091l/dsb-121l(after) procedures photos 1.Stop the air conditioner and disconnect the wire from indoor unit to outdoor unit. 2. Disassemble the case. (fig 1~2) ! Remove the top panel. (loosen thirteen screw) @ remove the front cabinet. (loosen six screw) # remove the ...

  • Page 57

    53 ¡ dsb-121l(before) procedures photos 1.Stop the air conditioner and disconnect the wire from indoor unit to outdoor unit. 2. Disassemble the case. (fig 1~2) ! Remove the top panel. (loosen two screw and remove six hook) @ remove the front cabinet. (loosen four screw and four hook) # remove the si...

  • Page 58

    54 3 exploded diagram (indoor unit) ¡ dsb-070l/dsb-091l.

  • Page 59

    55 ¡ dsb-070l/dsb-091l part list(indoor unit) no part code part name q'ty spec remark 1 3100400300 body 1 hips t2.0 2 3108004700 motor idu 1 ic-8417dwkf5a 3 3101500400 cushion motor 2 cr Ø30 4 3106400400 bearing plastic ass’y 1 5 3100053700 fan cross flow ass’y 1 Ø90.0xl540 6 7485401012 set screw 1 ...

  • Page 60

    56 ¡ dsb-121l.

  • Page 61

    57 ¡ dsb-121l part list(indoor unit) no part code part name q'ty spec remark 1 3100400201 body 1 abs or hips 2 3108001220 motor idu 1 220v 50/60hz 3 3101500400 cushion motor 2 cr 4 3106400200 bearing plastic ass'y 1 5 3100014400 fan cross flow ass'y 1 san+g. F20% 6 7485401012 set screw 1 6s-4 x 10-e...

  • Page 62

    No part code part name q'ty spec remark 15-8 3102794000 harness 1 i.D earth 15-9 3103400300 knob reset switch 1 abs 15-10 3100024000 mode select ass'y 1 ts-11 & harness 15-11 3101395060 power cord ass'y 1 buyer 15-12 7111301611 tapping screw 2 tis pan 3 x 16 mfzn 16 3102200401 frame grille 1 abs buy...

  • Page 63

    59 4 exploded diagram(outdoor unit) ¡ dsb-070l/dsb-091l/dsb-121l(after).

  • Page 64

    60 ¡ dsb-070l/dsb-091l /dsb-121l(after) part list(outdoor unit) no part code part name q'ty spec remark 1 3100300511 pan base 1 secc t1.2 070l/091l 3100300531 secc t1.2 121l 3107101180 m8 x l47.5 070l(lg comp. Qb125pl12b) 2 comp. Bolt 3 091l(lg comp. Qk164pn12f) 3106000900 m8xl46.5 091l(dw comp. Rbb...

  • Page 65

    61 ¡ dsb-070l/dsb-091l /dsb-121l(after) part list(outdoor unit) no part code part name q'ty spec remark 16 3102501100 guide support 1 secc t1.2 17 3102402600 grille condenser 1 p.E. 660x525.5xt3.5 18 3100601901 bracket motor 1 sbhg1 t1.2 3108004000 ic-9625dwlf5a 070l 19 3108004100 motor odu 1 ic-963...

  • Page 66

    62 ¡ dsb-121l(before).

  • Page 67

    No part code part name q'ty spec remark 1 3100300501 pan base 1 secc 2 3106000900 comp bolt 3 m8 x l46.5 mfzn 3 3102100800 foot 2 secc 4 3108134ae0 grommet 3 epdm 5 3100030ce0 compressor ass'y 1 rcb120a001 6 7400208411 washer plane 4 m8.4 x 0.D22 x t1.6 7 7392800011 nut lock 4 m8 x p1.25 mfzn 8 3100...

  • Page 68

    64 no part code part name q'ty spec remark 21-2 3109500700 capacitor dual 1 3.5+25µf 400vac 21-3 3101201100 clamp capacitor 1 sbhg1 21-4 3108900900 terminal block 1 323-hds103 21-5 3103800300 lock twist 1 datl-250 21-6 3101202000 clamp cord 1 nylon 21-7 7111301611 tapping screw 1 tis pan 3 x 16 mfzn...

  • Page 69: Control Box Assembly

    65 5 control box assembly 4 3 9 8 5 6 1 0 7 2 ¡ dsb-070l/dsb-091l.

  • Page 70

    66 ¡ dsb-070l/dsb-091l no part code part name q'ty spec remark 1 3100054400 control pcb ass’y 1 2 3108912300 terminal block 1 sn-dbw-03p 3 5epv050120 transformer 1 dwa-220b 220v 50/60hz 4 3106900300 capacitor sh.M.B 1 1.0µf 400vac 5 3104896300 sensor id ass’y 1 ptm-kd43c-d2 6 3101300100 power cord a...

  • Page 71

    67 6 5 4 3 1 2 7 8 h1 h3 h2 s h3 ¡ dsb-121l.

  • Page 72

    68 ¡ dsb-121l no part code part name q'ty spec remark 1 3100503101 control box 1 p.P+g.F 20% 2 3100054400 control pcb ass'y 1 fr-1 3 3108054200 led pcb ass'y 1 fr-1 4 3103400300 knob reset switch 1 abs 5 3101395060 power cord ass'y 1 buyer 6 3108901230 terminal block 1 sn-dbw-03p 7 5epv050100 trans ...

  • Page 73

    Deawoo electronics co., ltd 686, ahyeon-dong mapogu, seoul, korea. C.P.O. Box 8003 seoul korea telex: dwelec k28177-8 cable:"daewooelec" fax: +82-2-364-5588 tel: +82-2-360-7114, 8114 http://www.Dwe.Daewoo.Co.Kr s/m no. : dsb070l010 printed date: apr. 1999 ser vice manual daewoo electronics co., ltd ...