Daewoo DSB-090L Service Manual
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Daewoo DSB-090L Service Manual

Daewoo DSB-090L Service Manual

Split system
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Service Manual
Split System Air
Conditioner
Model: DSB-090L/DSB-120L
DSA-100L/DSA-120L
DAEWOO ELECTRONICS CO., LTD.

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Summary of Contents for Daewoo 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: Table Of Contents

    Contents CONTENTS 1. Specifications ....................2 2. Outline and Dimensions .................4 3. Operation .....................6 4. Wiring Diagram..................18 5. Refrigerant 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) Exploded Diagram (Indoor Unit) ...............52...

  • Page 3: Specifications

    1. SPECIFICATIONS ¡ DSB-090L MODEL DSB-090L ITEM Function Cooling Class Power AC 220-240V / 50Hz Capacity 2,770 Btu/h 9,500 Dehumidification Running Current 4.5A Electrical Power Input 950W Data Starting Current Type Rotary Compressor Model RCB 090A001 Capacitor 25µF/400VAC Division Indoor Unit...
  • Page 4 ¡ DSB-120L MODEL DSB-120L ITEM Function Cooling Class Power AC 220-240V / 50Hz Capacity 3,507 Btu/h 12,000 Dehumidification Running Current 5.7A Electrical Power Input 1,250A Data Starting Current Type Rotary Compressor Model RCB 120A001 Capacitor 25µF / 400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan...
  • Page 5 ¡ DSA-100L MODEL DSA-100L ITEM Function Cooling Class Power AC 208-230V / 60Hz Capacity 2,923 Btu/h 10,000 Dehumidification Running Current 5.1A Electrical Power Input 1,115W Data Starting Current Type Rotary Compressor Model RCA 100A001 Capacitor 25µF/400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan Propeller fan...
  • Page 6 ¡ DSA-120L MODEL DSA-120L ITEM Function Cooling Class Power AC 208-230V / 60Hz Capacity 3,507 Btu/h 12,000 Dehumidification Running Current 5.7A Electrical Power Input 1,250W Data Starting Current Type Rotary Compressor Model RCA 120A001 Capacitor 30µF / 400VAC Division Indoor Unit Outdoor Unit Type Cross flow fan...

  • Page 7: Outline And Dimensions

    2. OUTLINE AND DIMENSIONS INDOOR UNIT ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L...
  • Page 8 OUTDOOR UNIT ¡ DSB-090L/DSB-120L/DSA-100L/DSA-12OL...

  • Page 9: Operation

    3. OPERATION PARTS OF NAME AND FUNCTION ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L Indoor Unit Electrostatic Filter Air Inlet Deodorizing Filter (option) (option) Antibacterial Air Outlet Fan Direction Filter (Up, Down) Remote Power Plug Controller Receiver Lamp Remote Controller...

  • Page 10: Indoor Unit Display

    ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L Indoor Unit Display Switch Panel Remote Control Signal Receiver This place is the part to receive the signal if it EMERGENCY REMOTE receive the signal, you can hear the signal "beep, beep". § There is a switch panel at inside of Front Panel.
  • Page 11 ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L Outdoor Unit Air Inlet (side Back) Connection Wire Drain Hose Connecting Pipe Air Outlet 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.

  • Page 12: Remote Controller

    REMOTE CONTROLLER ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L Name of Each Button Display TEMP. Displays information pertaining to the SLEEP unit. HOUR TIMER The option is LEFT/RIGHT direction. AUTO NATURAL Temperature Buttons TEMP. Press to raise or lower the desired temperature. ON/OFF Button Press to turn the unit on or off.

  • Page 13: Remote Controller Display

    REMOTE CONTROLLER DISPLAY ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L MODE Indicators (Auto/Cool/Fan/Dehumidifier) Lights to indicate the mode selected. TRANSMITTER Icon Lights to indicate a signal is being sent. TEMP. TEMP. Indicator Temperature Lights to indicate the Indicator temperature is being set. Lights to indicate the...
  • Page 14 DESCRIPTION OF FUNCTIONS OFF-Timer If you set time in OFF-Timer Mode, the unit will stop at the set time. Unit ON Unit OFF SET Time HOUR ON-Timer If you set time in ON-Timer Mode, the unit will run at the set time. Unit ON Unit OFF SET Time...

  • Page 15: Sleep Mode

    Fan Speed (Indoor Unit) (1) Motor speed (Super high speed, high 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. DEHUMI- FAN ONLY COOL AUTO AUTO II...

  • Page 16: Emergency Operation

    Emergency Operation (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 •...

  • Page 17: Dehumidification Mode

    Auto Mode I (1) When the room temperature is higher than 28 ºC (Cooling Mode) !Compressor and lndoor Fan °C (Room temperature- Desired temperature) @ The fan will automatically operate as following Figure (Room temerature- °C Desired temperature) Dehumidification Mode Desired temperature <...
  • Page 18 Auto Mode II(Powerful Cooling) Fan Speed: Super high speed Air discharge direction: Fixed Set temperature: 18°C (Fixed) Compressor and Outdoor Fan The air discharge direction procedure is below Fixed Up/Down Fixed Up/Down Fixed Left/Right ƒR The option is LEFT/RIGHT direction. (Room temperature-18˚C) Self-Diagnostic Function The control will contain diagnostic test to verify the integrity of the system.

  • Page 19: Wiring Diagram

    4. WIRING DIAGRAM ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L POWER CORD EXPORT DOMESTIC COMP. RELAY PINK...
  • Page 20 MAIN ELECTRIC PARTS ¡ DSB-090L PART NAME PART CODE SPEC. QUANTITY REMARK Fan Motor 3108001200 IC-8428DWKG7A Fan Motor Capacitor 3106900300 1.0uF 400VAC Indoor Fuse 5FVLB3152L 250V 3.15A Unit Transformer 5EPV050100 220V/18V Stepping Motor 3108000100 MP28GA (L=400mm) Terminal Block 3108901120 323-HDS106...
  • Page 21 ¡ DSA-100L PART NAME PART CODE SPEC. QUANTITY REMARK Fan Motor 3108001200 IC-8428DWKG7A Fan Motor Capacitor 3106900300 1.0uF 400VAC Fuse 5FVLB3152L 250V 3.15A Indoor Transformer 5EPV050100 220V/18V Unit Stepping Motor 3108000100 MP28GA (L=400mm) Terminal Block 3108901120 323-HDS106 Compressor 3100030EE0 RCA100A001 Fan Motor 3108003000 IC-9630DWLA6A...

  • Page 22: Refrigerant Cycle

    Condenser Propeller fan OUTDOOR UNIT Refrigerant flow Note) If the pipe length exceeds the standard length, add 30g of refrigerant per extra meter. Model Name DSB-090L DSB-120L Contents Capillary tube ID1.6Ø x OD3.2Ø x L600 ID1.6Ø x OD3.2Ø x L600...

  • Page 23: Control Block Diagram

    6. CONTROL BLOCK DIAGRAM Operating Mode Unit on lamp Remoto Signal receiver Fan Speed Timer lamp Energency Timer Selection Air-clean lamp Flap Position Operation Natural lamp Temp. Setting ON/OFF Room air temp. SLEEP Indoor coil temp. REMOCON Circuit for signal receiver A/D converter lnitialization Beeper...

  • Page 24: Electric Circuit Diagram

    7. ELECTRIC CIRCUIT DIAGRAM ELECTRIC CIRCUIT DIAGRAM ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L EXPORT Indoor Unit Fan Motor TERMINAL BLOCK I.D.C SWING MOTOR DOMESTIC TRANS- FORMER TRIAC COMP. RELAY OVERLOAD Display Part PRO- TECTOR Control Part COMPRESSOR OUTDOOR UNIT ROOM AIR FAN MOTOR SENSOR...
  • Page 25 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.

  • Page 26: Trouble Shooting

    8. TROUBLE SHOOTING Troub Is the Is the po unit display applied t normal? unit Outdoor unit does Is the not run?(note. 1) power no check the volta L & N of te bloc Does the compressor run normally? press the powe button on remo Indoor unit does not run(note 1)
  • Page 27 ower Check power supply mains to the or interconnection wires ormal? Check the wiring of indoor age between erminal Place the switch Is the position to the switch position er ON/OFF "Remote" and then on switch pannel at ote controller "Remote"...
  • Page 28 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 fan runs.

  • Page 29: Neither Indoor Unit Nor Outdoor Unit Runs

    Neither Indoor Unit nor Outdoor Unit Runs 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 locafe the sleep mode and is the setting time over? # Is the setting mode DEHUMIDIFIER mode? $ When the unit is DEHUMIDIFIER mode while in the auto mode, the outdoor unit and indoor unit does not run.
  • Page 30 Outdoor Unit Runs but Indoor Fan Do Not Run Check rotation of indoor fan Check the Fan Motor bearing and fan Rotate indoor fan by hand Check the power P.C.B. Rating voltage Check input Voltage of Fan Motor connector at power P.C.B under 90% The circuit for triac control Rating Voltage more than 90%...
  • Page 31 Outdoor Fan and Compressor Do Not Run 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.
  • Page 32 Only Compressor Do not Run - Check the following at cooling mode Check the control P .C.B Rating voltage Check the voltge between the circuit for relay of indoor unit terminal less than 90% driving. Rating voltage more than 90% Check the connecting Rating voltage wire between indoor...
  • Page 33 PCB DRIVING DESCRIPTION...

  • Page 34: Pcb Circuit Diagram

    PCB CIRCUIT DIAGRAM 12.7K 10/16 VAREF 5267-04A VASS 12.7K 10/16 U2 65004 HOLD B6B-XH-A XOUT RESET TSA3100J 35313-0310 SNUBBER FAN CAP 35328-0310 INDOOR FAN TEST CN11 COMP 1N4004 B1P-LV-TA CN12 POWER 104K/250V 5096-03 KRC120M FUSE1 3.15A 1N4004 CN13 1N4004 5281-03 TRANS INPUT 7812 7805...
  • Page 35 • Circuit Description ! TEMPERATURE SENSING @ STEPPING MOTOR DRIVING # TRIAC DRIVING FOR DIF 5.6K DIP1 $ BUZZER DRIVING KIA7042P % COMPRESSOR RELAY DRIVING DIP2 ^ AC POWER SUPPLY 4.7µ/50V & POWER LINE FREQENCY MONITORING INPUT * DC POWER SUPPLY HOLE SENSOR ( LED DRIVING CN15...
  • Page 36 Power Supply(1) 104K/250V Z101 AC 220V 7812 7805 FUSE1 VI VO VI VO 3.15A 470µ/25V 47µ/16V 2200µ/35V POWER TRANS 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 C9.
  • Page 37 Sensor(3) Room temperature and Evaporator temperature Sensor Input PT-K43C 12.7K MICOM 10/16 5267-04A PT-K43C 12.7K 10/16 DESCRIPTION Number 2, 3 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 R1 (12.7KΩ) and R2 (12.7KΩ).
  • Page 38 Triac Driving(4) AC 220V TSA3100J MICOM SNUBBER KID 65004 TO MOTOR DESCRIPTION Number 38 Terminal of Micom is put out Pulse Output, by way of Buffer it is driving Photo Triac TSA3100J 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 39 Remote Controller(5) DESCRIPTION Signal from Remote Controller put in only Control Data Signal at Micom Terminal of Number 44, which is gotten fid of Carrier (38KHz) from Receive Module (GP3U77R). Signal Wave repeat third as following Fig 5-1. But in Secondary Wave Custom Code is Reversed Face. 4.5ms 16bit 24bit...
  • Page 40 Micom Power Supply(7) MICOM DESCRIPTION MICOM Power is 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...
  • Page 41 Reset(8) 5.6K 7042P MICOM 4.7/50 DESCRIPTION Voltage less than about 0.8V 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. Vcc (+5V) 4.25V DELAY TIME FOR POWER ON RESET...
  • Page 42 Function Selecting(9) DIPI MICOM DIP2 DESCRIPTION Selecting function is as following table 9-1. ƒRWhen power source is put at fist, Funtion selection input is recognized. And when the unit is running the microcomputer ignore variation of funtion selection input. LOGIC=LOW LOGIC=HIGH MICOM PORT FUNTION SELECT...
  • Page 43 Zero Crossing Detect(11) KRC120M MICOM TRANS OUTPUT DESCRIPTION It defect Zero Cross part of Trans output voltage, Transistor Q1 is used to put in the Micom. Detail Driving is as following Fig 11-1. R19 is Resistance to limit current. AC18V Number 55 of Micom...
  • Page 44 Stepping Motor Driving(12) R8 R9 R10 MP28GA 10KX4 Ø 1 Ø 2 FOR SWING MICOM Ø 3 Ø 4 KID65004 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...

  • Page 45: Remote Controller Lcd Panel Test

    REMOTE CONTROLLER LCD PANEL TEST (1) Selecting the test mode !When is the OFF state. @ Press the Temperature Buttons (¡ , ¡ª ) at the same time. # All display is on. $ Operating test flow press temperature Button. (¡ª ) (2) Test mode cancellation !After test program is completed.
  • Page 46 A. LCD PANEL TEST FLOW CHART START TS1 ON All display ON Select ¡ªKey Select ¡ªKey FAN SPEED display ON All display off Select ¡ªKey Select ¡ªKey FAN DIR. (L.R) Display ON Mode display ON Select ¡ªKey Select ¡ªKey Display at the beginning TEST OK TEMP mode display ON Select ¡ªKey...
  • Page 47 B. LCD PANEL TEST FLOW !All Display ON/OFF @ OPERATING Mode display # TEMPERATURE TEMP. Mode display SLEEP HOUR $ TIMER Mode display TIMER ^ FAN DIR AUTO Mode display % FAN SPEED NATURAL Mode display The option is LEFT/RIGHT direction. TEMP.
  • Page 48 C. REMOTE CONTROLLER ASSEMBLY FUNCTIONAL TEST METHOD TEST START Power supply again Power Supply Is Display at the beginning ON? Select ON/OFF button Check the Following BATTERY SPRING MICOM Is Display at the beginning ON? Select Mode button (A ¡ ¡...
  • Page 49 ERROR Is LCD display OFF? Select TIMER ON Button ERROR Is it normal Select Timer Enter Button ERROR TIMER ON display? Select CANCEL Button ERROR Is all display OFF? Select ON/OFF Button Select OFF (Timer) Button (0.5~12 HOUR) ERROR Is it normal? Select SLEEP Button SLEEP MODE ERROR...

  • Page 50: Key Components Of Electronic Circuit

    9. KEY COMPONENTS OF ELECTRONIC CIRCUIT (1) U1 (MICOM) VAREF VASS R40 (AIN0) Function S/W Temperature R41 (AIN1) sensor input R42 (AIN2) R92 (SCK) R43 (AIN3) R91 (SO) R50 (AIN4) R90 (SI) R51 (AIN5) R83 (T1) R52 (AIN6) R82 (INT1) Zero crosing detect R53 (AIN7) R81 (T2)
  • Page 51 (2) U2, 4 (KID65004) DARLINGTON ARRAYS IN1 1 16 OUT 1 KID65004AP IN2 2 15 OUT 2 COMMON IN 3 3 14 OUT 3 INPUT OUTPUT IN 4 4 13 OUT 4 10.5K‰ IN5 5 12 OUT 5 7.2K‰ IN6 6 11 OUT 6 IN7 7 10 OUT 7...
  • Page 52 (5) U9 (KIA7042P) : RESET IC KIA70 INPUT OUTLINE GROUND OUTPUT (6) U5 (TSA3100J) : PHOTO TRIAC 1. AC output (MT2) 2. AC output (MT1) 3. GATE 4. DC input (+) 5. DC input (-)

  • Page 53: Disassembly Instructions

    10. DISASSEMBLY INSTRUCTIONS INDOOR UNIT ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L PROCEDURES PHOTOS 1. Stop the Air conditioner and disconnect the power cord from the wall outlet. Fig 1 2. Removing the insert Grille and Frame Grille. (Fig 1~2) !Draw up the insert Grille and remove it.

  • Page 54: Outdoor Unit

    OUTDOOR UNIT ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L PROCEDURES PHOTOS 1.Stop the air conditioner and disconnect the wire from Indoor Unit to Outdoor Unit. 2. Dissemble the case. (Fig 1~2) Fig 1 !Remove the Top Panel. (Lossen two screw and remove six hook) @ Remove the Front Cabinet. (Loon four screw and four hook) # Remove the Side Cabinet and Back Cabinet.

  • Page 55: Exploded Diagram (Indoor Unit)

    EXPLODED DIAGRAM (Indoor Unit) ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L...
  • Page 56 ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L PARTS LIST(INDOOR UNIT) PART CODE PART NAME Q'TY SPEC REMARK 3100400201 BODY ABS or HIPS 3108001200 MOTOR FCU 220V 50/60Hz 3101500400 CUSHION MOTOR 3106400200 BEARING PLASTIC ASS'Y 3100014400 C.F.F. ASS'Y SAN+G. F20% 7485401012 SET SCREW 6S-4 X 10-E 3100014300 EVA.

  • Page 57: Exploded Diagram (Outdoor Unit)

    EXPLODED DIAGRAM (Outdoor Unit) ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L...
  • Page 58 ¡ DSB-090L/DSB-120L PARTS LIST(OUTDOOR UNIT) PART CODE PART NAME Q'TY SPEC REMARK 3100300501 PAN BASE SECC 3106000900 COMP BOLT M8 X L46.5 MFZN 3102100800 FOOT SECC 3108134AE0 GROMMET EPDM 3100030CE0 RCB120A001 B-120L COMPRESSOR ASS'Y 3100030FE0 RCB090A001 B-090L 7400208411 WASHER PLANE M8.4 X 0.D22 X T1.6...
  • Page 59 ¡ DSA-100L/DSA-120L PARTS LIST(OUTDOOR UNIT) PART CODE PART NAME Q'TY SPEC REMARK 3100300501 PAN BASE SECC 3106000900 COMP BOLT M8 X L46.5 MFZN 3102100800 FOOT SECC 3108134AE0 GROMMET EPDM 3100030DE0 RCA120A001 A-120L COMPRESSOR ASS'Y 3100030EE0 RCA100A001 A-100L 7400208411 WASHER PLANE M8.4 X 0.D22 X T1.6 7392800011 NUT LOCK...

  • Page 60: Control Box Assembly

    CONTROL BOX ASSEMBLY &...
  • Page 61 ¡ DSB-090L/DSB-120L/DSA-100L/DSA-120L PART CODE PART NAME Q'TY SPEC REMARK 3100503101 CONTROL BOX P .P+G.F 20% 3104397100 CONTROL PCB ASS'Y FR-4 3104397200 LED PCB ASS'Y FR-4 3103400300 KNOB RESET SWITCH 3101395030 POWER CORD ASS'Y BUYER 3108901120 TERMINAL BLOCK 323-HDS106 5EPV050100 TRANS FORMER...
  • Page 62 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...

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Dsb-120lDsa-100lDsa-120l

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