Daewoo DSB-090L Service Manual Download

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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. : DSB090L010 PRINTED DATE: JUL.1998

SER

VICE MANUAL

DAEWOO ELECTRONICS CO., LTD

OVERSEAS SERVICE DEPT.

Summary of Contents for DSB-090L

Page 1: ...Service Manual Split System Air Conditioner Model DSB 090L DSB 120L DSA 100L DSA 120L DAEWOO ELECTRONICS CO LTD...

Page 2: ...t Cycle 21 6 Control Block Diagram 22 7 Electric Circuit Diagram 23 8 Trouble Shooting 25 9 Key Components of Electronic Circuit 47 10 Disassembly Instructions 50 1 Indoor Unit 50 2 Outdoor Unit 51 3...

Page 3: ...l RCB 090A001 Capacitor 25 F 400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan Propeller fan Capacitor 1 0 F 400VAC 1 8 F 400VAC Motor Model Number IC 8428DWKG7A IC 9630DWLC5A Control Capil...

Page 4: ...20A001 Capacitor 25 F 400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan Propeller fan Capacitor 1 0 F 400VAC 3 5 F 400VAC Motor Model Number IC 8428DWKG7A IC 9430DWLC5A Control Capillary Ch...

Page 5: ...00A001 Capacitor 25 F 400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan Propeller fan Capacitor 1 0 F 400VAC 1 8 F 400VAC Motor Model Number IC 8428DWKG7A IC 9630DWLA6A Control Capillary Ch...

Page 6: ...20A001 Capacitor 30 F 400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan Propeller fan Capacitor 1 0 F 400VAC 2 0 F 400VAC Motor Model Number IC 8428DWKG7A IC 9630DWLA6A Control Capillary Ch...

Page 7: ...6 REMOCON Filter L Filter R Grille Insert Frame Grille Body Plate Mounting Connecting Pipe Plate Mounting 406 194 285 925 2 OUTLINE AND DIMENSIONS 1 INDOOR UNIT DSB 090L DSB 120L DSA 100L DSA 120L...

Page 8: ...7 2 OUTDOOR UNIT Cabinet Side Handle Cabinet Front Foot 264 334 Panel Top Cabinet Back 552 572 Inlet AIR Inlet Outlet Foot Cushion Service Valve 666 DSB 090L DSB 120L DSA 100L DSA 12OL...

Page 9: ...L DSA 100L DSA 120L Power Plug O N O F F T E M P A IR C O N D IT IO N E R R E M O TE C O N TR O LL E R Electrostatic Filter option Deodorizing Filter option Air Inlet Antibacterial Filter Air Outlet F...

Page 10: ...on is going on There is a switch panel at inside of Front Panel At the time of operating open the Front Panel Air clean Green FAN DELAY Green Lights during the time Fan delay mode Indoor Unit Display...

Page 11: ...Unit DSB 090L DSB 120L DSA 100L DSA 120L 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...

Page 12: ...settings to their default positions CANCEL Button Press to cancel Timer settings SLEEP Button Press to set the unit for the sleep mode ON OFF Button Press to turn the unit on or off ENTER Button Pres...

Page 13: ...dicate a signal is being sent TEMP Indicator Lights to indicate the temperature is being set SLEEP Indicator Lights to indicate the unit is in sleep mode NATURAL Indicator Lights to indicate the tempe...

Page 14: ...ive the signal of Remote Controller you can hear the signal beep or beep beep 1 In the case of receiving ON OFF signal beep beep 2 And so on beep OFF Timer 4 DESCRIPTION OF FUNCTIONS Unit ON Unit OFF...

Page 15: ...h speed normal speed low speed ultra low speed 2 Remote controller setting fan speed Auto L M H Natural 3 Relation of operating mode between fan speed 4 Automatic Operation If the unit is set in AUTO...

Page 16: ...f continuous compressor operation from the start the microcomputer of the unit stops the compressor to protect the unit from the frost The control procedure for indoor coil freeze protection 1 The com...

Page 17: ...Fan The fan will automatically operate as following Figure 1 0 1 C OFF ON Room temperature Desired temperature H M L 0 1 2 3 C Room temerature Desired temperature Desired temperature Room temperature...

Page 18: ...FF ON Room temperature 18 C 0 1 Self Diagnostic Function The control will contain diagnostic test to verify the integrity of the system 1 Error Code Display Pattern ON LAMP ON Red LED ON OFF Error Cod...

Page 19: ...RN BLU POWER CORD PCB TRANS LED PCB 1 1 2 3 COMP 1 2 1 2 1 2 3 4 5 6 7 1 2 3 4 1 2 3 BLK BLK LED LED BLU RED GRN YEL GRY BRN BLK BLK BLK BLK BLK YEL RED BLU I D SENSOR SELECT S W HOLE SENSOR 1 2 3 ORG...

Page 20: ...or 3100030FE0 RCB090A001 1 Fan Motor 3108001300 IC 9630DWLC5A 1 Dual Capacitor 3109501201 1 8 25 F 400VAC 1 Terminal Block 3108900900 323 HDS103 1 PART NAME PART CODE SPEC QUANTITY REMARK Fan Motor 31...

Page 21: ...1 Dual Capacitor 3109501201 1 8 25 F 400VAC 1 Terminal Block 3108900900 323 HDS103 1 Indoor Unit Outdoor Unit Indoor Unit Outdoor Unit PART NAME PART CODE SPEC QUANTITY REMARK Fan Motor 3108001200 IC...

Page 22: ...ice valve Accumulator Compressor Note If the pipe length exceeds the standard length add 30g of refrigerant per extra meter DSB 090L DSB 120L Capillary tube ID1 6 x OD3 2 x L600 ID1 6 x OD3 2 x L600 C...

Page 23: ...ndoor coil temp Timer lamp Air clean lamp Remoto Energency Operation Signal receiver Natural lamp A D converter lnitialization Clock generation DC power supply Circuit for motor driving Circuit for re...

Page 24: ...ER K1 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 L1 Indoor Unit Fan Motor Y L1 N L...

Page 25: ...ce more the relay and triac are turn off and the unit stops operation 3 The unit turns on or off according to the temperature setpoint by sensing the room air temperature through thermistor 4 If the f...

Page 26: ...rmal check the failure code according to the self diagonostic note 2 Normal check the connecting point of magnetic contactor YES YES YES YES NO NO YES Troub Is the po applied t unit Is the power no ch...

Page 27: ...onnection wires Check the wiring of indoor Is the switch position on switch pannel at Remote Does control PCB status LED repeat one second on and off control PCB fault Micom or reset IC fault Check th...

Page 28: ...Check soldering of connecting on control P C B Error of soldering or short Check the resistance of room air thermistor 2 Error Code 2 Check the connector of indoor coil thermistor or connecting wire...

Page 29: ...es not run The power is applied to the unit Check the voltge between and of terminal block N L Check the Breaker or Fuse Self Diagnostic function is ON Check according to self Diagnostic function Cont...

Page 30: ...Check the connecting wire of indoor fan motor Run again Check the starting of indoor fan motor Do ERROR 4 occur Change indoor fan motor sensor Run again Check the Fan Motor bearing and fan Check the...

Page 31: ...ng dehumidifier mode Outdoor Fan and Compressor Do Not Run Check the voltge between and of indoor unit terminal N L Check the voltge between and of outdoor unit terminal N L Check the voltge between a...

Page 32: ...oor unit Check the compressor Check the winding resistance Check the compressor capacitor Check the connecting wire between indoor and outdoor Change the magnetic contactor Change the compressor Check...

Page 33: ...PCBDRIVINGDESCRIPTION...

Page 34: ...1 2 3 15A 3 2 1 CN13 5281 03 TRANS INPUT D5 1 2 1N4004 D6 1 2 1N4004 1 2 R40 10K 2 1 C23 103 1 2 1 2 3 2 1 2 1 Q1 KRC120M R18 1K U8 7805 C13 47 16 2 C12 104 2 1 2 1 C11 470 25V 2 C10 104 C9 2 1 2 1 U7...

Page 35: ...2 104 R20 10K R21 10K R22 10K R23 10K R24 10K R25 10K R26 10K 2 1 1 2 1 2 1 2 1 2 1 2 1 2 1 2 DIP1 1 2 3 4 5 10 9 8 7 6 DIP2 1 2 4 3 2 1 C17 4 7 50V C9 KIA7042P R27 5 6K 1 2 5V 5V R38 1K 1 2 R37 330 H...

Page 36: ...C voltage is about 18V is regulated 12V DC by Regulator IC7812 And it is regulated 5V DC by Regulator IC7805 Z101 is serge filter and C10 C12 C14 is Noise filter AC 220V C8 104K 250V Z101 FUSE1 3 15A...

Page 37: ...er Resistance Micom is put in 5V by ratio between R1 12 7K and R2 12 7K Relation between temperature and voltage is following Table 3 1 C1 2 3 4 is Noise filter Temperature C No 1 No 3 10 0 21 0 21 0...

Page 38: ...l 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 Ref Fig 4 1 RU1 is Snubber N L AC 220V TO MOTOR RU1 S...

Page 39: ...TOM CODE DATA CODE CHECK SUM TAILER 9ms 4 5ms 16bit 16bit 24bit 8bit Fig 5 1 Fig 5 2 BIT STRUCTURE Remote Controller 5 0 56ms 0 56ms 1 69ms 1 12ms 2 25ms bit 0 bit 1 Selecting Mode 6 SELECT S W INPUT...

Page 40: ...supplied 5V at Number 1 using VDD Number 2 using reference of A D converter Analog and Number 1 using Reference of A D Converter Analog C7 is noise filter Micom Power Supply 7 64 48 C7 104 VDD 47 46 4...

Page 41: ...put in Micom Terminal of Number 49 and then Micom reset Reset IC detect Power ON and Voltage less than 4 25V and then send Reset Signal Reset 8 MICOM 49 C17 4 7 50 U9 7042P R27 5 6K 5V 4 25V H L t t P...

Page 42: ...on selection input is recognized And when the unit is running the microcomputer ignore variation of funtion selection input MICOM 63 62 61 60 19 20 21 R20 10K R21 10K R22 10K R23 10K R24 10K R25 10K R...

Page 43: ...ut in the Micom Detail Driving is as following Fig 11 1 R19 is Resistance to limit current MICOM TRANS OUTPUT D5 1 2 D6 1 2 1 2 R40 10K 1 2 C23 103 Q1 KRC120M 1 2 1 2 3 2 1 R18 1K 2 1 R19 10K 1 2 VCC...

Page 44: ...is used 4 face Drive Method It is driving as following Fig 12 1 Ring Count Method of 8 Status 4 3 2 1 B 6 5 4 3 2 1 12V 5V R8 R9 R10 V2 KID65004 10KX4 R7 CN3 15 MICOM 16 17 18 M1 FOR SWING MP28GA 4 3...

Page 45: ...Buttons at the same time All display is on Operating test flow press temperature Button 2 Test mode cancellation After test program is completed If the reset button is pressed 3 LCD panel test flow N...

Page 46: ...y ON All display off FAN SPEED display ON FAN DIR L R Display ON Display at the beginning TEST OK Mode display ON TEMP mode display ON Time display ON TS1 ON Select Key Select Key Select Key Select Ke...

Page 47: ...HOUR OFF ON A TEMP A AUTO B LCD PANEL TEST FLOW OPERATING Mode display TEMPERATURE Mode display TIMER Mode display FAN SPEED Mode display All Display ON OFF FAN DIR Mode display The option is LEFT RI...

Page 48: ...p Button it is changed by 1 C 18 32 C Select FAN SPEED button Select FAN DIR button Select FAN DIR button Select TEMP Button Select ON OFF button Power Supply TEST START Power supply again Check the F...

Page 49: ...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 ON Is all display OFF Is it normal SLEEP MODE Display...

Page 50: ...T1 R60 11 54 R81 T2 R61 12 53 R80 INT2 R62 13 52 HOLD KE0 R63 14 51 XOUT R70 15 50 XIN R71 WTO 16 49 RESET R72 XTIN 17 48 K03 R72 XTOUT 18 47 K02 RA0 19 46 K01 RA1 20 45 K00 Receiver RPM DETECT REMOCO...

Page 51: ...IODES COMMON 10 5K 7 2K 3K OUTPUT GND INPUT 100K 500 100 100 0 3 10K 6K 500 1K 5K 28K 6K 30pF 2K 5K 200 240 1 4 K 2 7 K 3 3 K 0 19K INPUT OUTPUT GND SCHEMATIC DIAGRAM 1 2 3 Fin 2 is ground for Cose 22...

Page 52: ...49 5 U9 KIA7042P RESET IC 6 U5 TSA3100J PHOTO TRIAC KIA70 42P OUTLINE INPUT GROUND OUTPUT VCC OUT GND 4 5 1 2 3 1 AC output MT2 2 AC output MT1 3 GATE 4 DC input 5 DC input...

Page 53: ...connection at the Control PCB Remove the select switch from connection at the Control PCB Loosen a screw for fixing ground wire Remove the Control Box 4 Removing the Drain Pan Fig 4 Disconnect the Bod...

Page 54: ...ler Fan Fig 3 Loosen the Nut for fixing the propeller Fan Remove the Plain Washer Remove the Propeller Fan 4 Removing the Motor ODU Fig 4 Loosen four screw at Bracket Motor Disconnect the wire at Cont...

Page 55: ...52 3 EXPLODED DIAGRAM Indoor Unit DSB 090L DSB 120L DSA 100L DSA 120L...

Page 56: ...BLOCK 1 323 HDS106 15 7 3104896300 SENSOR I D ASS Y 1 PTM KD43C D2 15 8 3102797900 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...

Page 57: ...54 4 EXPLODED DIAGRAM Outdoor Unit DSB 090L DSB 120L DSA 100L DSA 120L...

Page 58: ...3101801000 FAN PROPELLER 1 ABS G F20 21 3100015400 PANEL CONTROL ASS Y 1 B 120L 3100029100 B 090L 21 1 3104201301 PANEL CONTROL 1 SBHG1 21 2 3109500701 CAPACITOR DUAL 1 3 5 25 F 400VAC B 120L 31095012...

Page 59: ...N PROPELLER 1 ABS G F20 21 3100047900 PANEL CONTROL ASS Y 1 A 120L 3100029100 A 100L 21 1 3104201301 PANEL CONTROL 1 SBHG1 21 2 3109502000 CAPACITOR DUAL 1 2 0 30 F 400VAC A 120L 3109501201 1 8 25 F 4...

Page 60: ...57 5 CONTROL BOX ASSEMBLY H1 H2 H3 H4 S...

Page 61: ...F 20 2 3104397100 CONTROL PCB ASS Y 1 FR 4 3 3104397200 LED PCB ASS Y 1 FR 4 4 3103400300 KNOB RESET SWITCH 1 ABS 5 3101395030 POWER CORD ASS Y 1 BUYER 6 3108901120 TERMINAL BLOCK 1 323 HDS106 7 5EPV...

Page 62: ...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 DSB090L010 PRINTED DATE JUL 1998 SERVICE MANUAL...

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