Daewoo DPB-280LH Service Manual
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Daewoo DPB-280LH Service Manual

Floor standing air conditioner
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Service Manual

FLOOR STANDING AIR CONDITIONER
Model: DPB-280LH
DAEWOO ELECTRONICS CO., LTD.
OVERSEAS SERVICE DEFT.

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Summary of Contents for Daewoo DPB-280LH

  • Page 1: Service Manual

    Service Manual FLOOR STANDING AIR CONDITIONER Model: DPB-280LH DAEWOO ELECTRONICS CO., LTD. OVERSEAS SERVICE DEFT.

  • Page 2: Table Of Contents

    Contents CONTENTS 1. Installation Guide...................2 2. Specification....................5 3. Outline......................6 4. Operation .....................8 5. Circuit Diagram...................18 6. Refrigerant Cycle ..................35 7. Trouble Shooting..................36 8. Exploded Diagram ..................43...

  • Page 3: Installation Guide

    1. INSTALLATION GUIDE INSTALLATION PLACE Indoor unit Outdoor unit • Flat and strong place in the room • A place no reach of direct ray of sun (if necessary, shield the • No obstacles in front of air in/out grille light) •...

  • Page 4: Installation Of Indoor Unit

    INSTALLATION OF INDOOR UNIT 1) Drain hose should maintain downward slope to outside of room. 2) Indoor unit should be fixed firmly with the bracket to avoid falling down. The bracket has several holes to fix the unit any direction needed (fore/back/right/left) INSTALLATION OF OUTDOOR UNIT 1) Cushion rubbers absorb vibration of outdoor unit...

  • Page 5: Electrical Wiring

    Spec Color 1.25mm BLUE SIGNAL LINE 1.25mm BLACK SIGNAL LINE 1.25mm SIGNAL LINE 1.25mm BROWN SIGNAL LINE 1.25mm BROWN MAIN POWER (INDOOR) 1.25mm YEL/GRN MAIN POWER (INDOOR) 1.25mm RED(or BLUE) MAIN POWER (INDOOR) 2.0mm BLACK MAIN POWER (OUTDOOR) 2.0mm YEL/GRN MAIN POWER (OUTDOOR) 2.0mm WHITE...

  • Page 6: Specification

    2. SPECIFICATIONS DPB-280LH MODEL DPB-280LH ITEM Function COOLING HEATING Class Power 220~240V/ 50Hz Capacity 8,200 8,200 Btu/h 28,000 28,000 Dehumidification Running Current Electrical Power Input 2,800 2,800 Data Starting Current Type Scroll Compressor Model ZR36K3-PFJ-501 Capacitor 50µF/370V AC Indoor Unit...

  • Page 7: Outline

    3. OUTLINE INDOOR UNIT DPB-280LH Part Name Quantity Description Remarks Connecting Hole ø60X100 (Left, Right, Back) Evaporator Heat Exchanger Suction Grille Air Inlet Discharge Grille Air outlet Fan Blower Sirocco Type Joint (Gas) OD ø15.88mm Joint (Liquid) OD ø9.52mm...
  • Page 8 OUTDOOR UNIT DPB-280LH Part Name Quantity Description Remarks Service Valve (Liquid) OD ø9.52mm Flare Type Service Valve (Gas) OD ø15.88mm Flare Type Service Door Fan Guard Fan Protector Fan Blower Propeller type Condenser Heat Exchanger Fan motor Foor propeller fan...

  • Page 9: Operation

    4. OPERATION PARTS OF NAME AND FUNCTION Indoor Unit AIR OUT - According to the operation mode, it is opened/closed automatically. MAIN CONTROLS/ REMOTE SENSOR AIR IN - It is to suck warm air. - There is an air filter inside this grille. •...
  • Page 10 ROOM TEMPERATURE / DESIRED TEMPERATURE INDICATOR - It displays current room temperature and desired room temperature. FAN MODE INDICATOR AUTO FAN SPEED INDICATOR AUTO MODE INDICATOR FAN SPEED INDICATOR COOL MODE INDICATOR TIMER/SLEEP INDICATOR QUICK MODE INDICATOR ECONOMY MODE INDICATOR MODE BUTTON HEAT MODE INDICATOR...

  • Page 11: Outdoor Unit

    Outdoor Unit OUTDOOR UNIT AIR OUT SERVICE VALVES(GAS TUBE) SERVICE VALVES(LIQUID TUBE) CAUTION • Do not install the outdoor unit on OUTDOOR UNIT AIR IN unstable place like outside wall of - If there is any obstacle in front building or outside of balcony. In case of falling, it may cause serious trouble of the grille, the efficiency of and damage.

  • Page 12: Remote Controller

    REMOTE CONTROLLER Name of Each Button Display AUTO Displays information pertaining to unit. ON/OFF Button Press to turn the unit on or off. TEMPERATURE Buttons Press to raise or lower FAN SPEED Button the desired temperature. Press to select the fan speed FAN DIR.

  • Page 13: Remote Controller Display

    REMOTE CONTROLLER DISPLAY MODE Indicators (Auto/Quick/Cool/Fan/Dehumidifier/Heat) Lights to indicate the mode selected. AUTO FAN Indicators FAN DIRECTION Indicators Lights to indicate Lights to indicate the the fan speed. fan direction. NATURAL Indicator Lights to indicate the speeds simulating a breeze. TIMER Indicators Lights to indicate the timer function mode.
  • 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 Fan Speed (Indoor Unit) (1) Motor speed (high speed, middle speed, low speed). (2) Remote controller setting fan speed. (Auto, L, M, H, Natural) (3) Relation of operating mode between fan speed. (legned: X-no relation) DEHUMI- FAN ONLY COOL AUTO QUICK HEAT DIFICATION...

  • Page 16: Sleep Mode

    Sleep Mode (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. +0.5 C +0.5 C –0.5 C +0.5 C –0.5 C –0.5 C...

  • Page 17: Auto Mode

    3 min. Time Delay of Compressor In normal operation, there is a time delay of three minutes between turn off and turning back on including initial 3 Seconds Time Delay of Indoor Fan Motor When the speed of indoor fan motor changes, there is a time delay of 3 seconds at each speed step. Auto Mode (1) In Auto Mode After the indoor fan is operated for 20 seconds in the Auto Mode, the unit will operate automatically by selecting...

  • Page 18: Dehumidification Mode

    Dehumidification Mode < DT+1˚C Outdoor Fan, Compressor : ON Indoor Fan : Low speed < < DT-1˚C DT+1˚C Outdoor Fan, Compressor : 3 min/ON, 5 min/OFF Indoor Fan : Low speed DT-1˚C > RT Outdoor Fan, Compressor : OFF Indoor Fan : Low speed Air Discharge Direction 1.

  • Page 19: Circuit Diagram

    5. CIRCUIT DIAGRAM WIRE CONNECTION OF INDOOR AND OUTDOOR UNIT DPB-280LH...
  • Page 20 MAIN ELECTRIC PARTS DPB-280LH Object/part No. Manufacturer/trademark Type/model Technical data Standard Mark(s) of confirmity Motor-compressor Copeland ZR36K3-PFJ AC220-240V 50Hz R22 DEMKO Outdoor fan motor A2935BA010 AC 230V 50Hz NONE Indoor fan motor O-YANG DE112 AC 230V 50Hz NONE Thermal protector for...
  • Page 21 PCB CIRCUIT DIAGRAM...
  • Page 22 Part Code Part Name Quantity Specification 3108803400 GP881206-2(187) 5FVLB3152L FUSE 250V 50T 3.15A 3107000600 FUSE CLIP AFC-520 3108802500 WAFER YW396-03AVD 3108802600 WAFER YW396-03AVD (RD) 3108802700 WAFER YW396-03AVD (BK) 3108802900 WAFER YW396-05AVD 3108803000 WAFER YW500-02V 3108801900 WAFER SMW250-04 3108801910 WAFER SMW250-04(RD) 3108802000 WAFER SMW250-06...
  • Page 23 Part Code Part Name Quantity Specification RD-2K200J- RESISTOR 1/2W-20J RD-2K390J- RESISTOR 1/2W-39J RD-2K121J- RESISTOR 1/2W-150J RD-2K102J- RESISTOR 1/2W-1KJ CLV-B3104M C-LINE ACROSS 275V 104K 4EFR-37071 SNUBBER 0.1UF 120 300V 3105796100 HEAT SHINK 33(H)X23X17 3106002900 WASHER HEAT SINKøÎ 3105698200 BUZZER DP-2520BA 52C131J003 COIL 130uH 3A 3109400100...

  • Page 24: Pcb Driving Description

    PCB DRIVING DESCRIPTION Power Supply(1) AC 220V 275V 7812 7805 104K FUSE1 VI VO VI VO 3.15A 100 F 1000 F 470 F 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, Stepping Motor.
  • Page 25 Sensor(3) Room temperature and Evaporator temperature Sensor Input CN10 MICOM PT-K43C 12.7K Room SMW250-04 PT-K43C 12.7K DESCRIPTION Number 23 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 R37 (12.7K ) and R38 (12.7K ).
  • Page 26 Triac Driving(4) AC 220V TLP561 130 H MICOM 0.1 F 120Ohm SM3JZ47 KID 65004 TO MOTOR 1/2W DESCRIPTION Number 32 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 27 Remote Controller(5) 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. 4.5ms 16bit 24bit...
  • Page 28 Micom Power Supply(7) VDD 42 10 F MICOM 8MHz DESCRIPTION MICOM Power is supplied 5V at Number 42 using VDD, Number 19, 20 Using Oscillator, CC7 is noise filter.
  • Page 29 Reset(8) 5.6K 7042P 4.7 F MICOM 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. Vcc (+5V) 4.25V DELAY TIME FOR POWER ON...
  • Page 30 Function Selecting(9) MICOM DESCRIPTION Selecting function is as following table 9-1. When power source is put at first, Funtion selection input is recognized. And when the unit is running the microcomputer ignore variation of funtion selection input. SHORT OPEN SIMPLE MILD HIGH Heat Pump...
  • Page 31 Zero Crossing Detect(11) KRC102M MICOM TRANS OUTPUT 5.6K DESCRIPTION It detect Zero Cross part of Trans output voltage, Transistor TR2 is used to put in the Micom. Detail Driving is as following Fig 11-1. AC18V Number 31 of Micom terminal DETECT POINT Fig 11-1...
  • Page 32 Stepping Motor Driving(12) CN11 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 33 MICOM Display Output P77(HSO) P76(HSCK) (XTOUT)P22 Key Input P75(SO) (XTIN)P21 P74(SI) (INT5/STOP)P20 P73(SCK) Compressor Heater Driving P72(PDO/PWM) P71(INT4) (TC2)P15 P70(INT3/TC3) (PPG)P14 Outdoor Unit Motor Driving Stepping Motor (DVO)P13 Buzzer Driving (INT2/TC1)P12 Remocon Input (INT1)P11 Indoor Unit Motor Driving (INTO)P10 Zero Crossing Detect (AIN7)P67 Display Driving Compressor Relay Driving...
  • Page 34 DARLINGTON ARRAYS (KID65004) IN1 1 16 OUT 1 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 GND 8...
  • Page 35 RESET IC (KIA 7042P) KIA70 INPUT OUTLINE GROUND OUTPUT...

  • Page 36: Refrigerant Cycle

    6. REFRIGERANT CYCLE INDOOR UNIT OUTDOOR UNIT HIGH PRESSURE SWITCH INDOOR HEAT EXCHANGER UNION SERVICE VALVE FILTER OUTDOOR COMPRESSOR HEAT EXCHANGER DISTRIBUTER CAPILLARY TUBE Note) If the pipe length exceeds the standard length, add 30g of refrigerant per extra meter. Model Name Cooling Heating...

  • Page 37: Trouble Shooting

    Trouble Is the Is the power Check power supply mains unit display applied to the or interconnection wires normal? unit Outdoor unit does Is the not run?(note. 1) power normal? check the voltage between Check the wiring of indoor L & N of terminal block Does the compressor run...

  • Page 38: Neither Indoor Unit Nor Outdoor Unit Runs

    Neither Indoor Unit nor Outdoor Unit Runs The power is applied to the unit Rating voltage Check the Breaker or Fuse under 90% Check the voltage between of terminal block Rating voltage more than 90% Check the indoor unit display Self Diagnostic is the display all off? function is ON...
  • Page 39 Outdoor Unit Runs but Indoor Unit 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 40 Outdoor Fan Do Not Run Rating voltage Check the voltage between Check the of outdoor unit terminal connecting wire under 90% Check the wiring Rating voltage Check the voltage between and voltage of indoor unit terminal under 90% within doors Rating voltage Check the Check the voltage between...
  • Page 41 Only Compressor Do not Run - Check the following at cooling mode Check the connecting Rating voltage Check the voltage between wire between indoor of outdoor unit terminal less than 90% and outdoor. Rating voltage more than 90% Check the control P.C.B Rating voltage Check the voltage between the circuit for relay...
  • Page 42 REMOTE CONTROLLER ASSMBLY 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 ERROR Is it normal? Select FAN SPEED button Is it normal? ERROR...
  • Page 43 ERROR Is LCD display OFF? Select TIMER ON Button ERROR Is it normal Select Timer Enter Button display? ERROR TIMER Select CANCEL Button ERROR Is all display OFF? Select ON/OFF Button Select OFF (Timer) Button (0.5~24 HOUR) ERROR Is it normal? Select SLEEP Button SLEEP MODE ERROR...

  • Page 44: Exploded Diagram

    8. EXPLODED DIAGRAM INDOOR UNIT...
  • Page 46 Part Code Part Name Quantity Remarks 3100090100 ASSY CABNET BODY 3100042301 BASE MOTOR ASSY 3100602801 BRACKET PAN DRAIN 3108008600 MOTOR IDU 3101501900 CUSHION MOTOR 3106600210 SCROLL HOUSING 3106903100 CAPACITOR MOTOR IDU 3100025000 BLOWER ASSY 3105200300 WASHER STOPPER 3100301600 BASE 3101501100 CUSHION BASE 3100503901 BOX CONTROL...
  • Page 47 Part Code Part Name Quantity Remarks 3100604800 BRACKET FRONT R 3102201600 FRAME DISCHARGE 310P40086E SWING MOTOR ASSY 3108005300 MOTOR STEPPING 3101101300 CASE MOTOR 3100702100 BUSHING MOTOR 3106501430 BLADE HORIZONTAL 1 3106501530 BLADE HORIZONTAL 2 3107801000 LINK GUIDE R 3107802200 LINK M 3106700100 3106301100 BAR VERTICAL...
  • Page 48 OUTDOOR UNIT...
  • Page 50 Part Code Part Name Quantity Remarks 3100041704 BASE PAN PAINT ASSY 3107103000 COMPRESSOR ASSY 3107103200 CUSHION COMP 7400208411 WASHER PLAIN 7392801211 NUT LOCK 3102800300 CRANKCASE HEATER 3100031223 CONDENSER ASSY 3102402100 GRILLE COND 3100041100 GUIDE POST P/T ASSY 3100041201 BRK SERVICE P/TAS 3105401300 SERVICE VALVE G 3105401200...
  • Page 51 DAEWOO ELECTRONICS CO., LTD. 686, AHYEON-DONG MAPO-GU SEOUL, KOREA C.P.O. BOX 8003 SEOUL, KOREA TELEX: DWELEC K28177-8 CABLE: “DAEWOOELEC” FAX: 02) 360-8184 TEL: 02) 360-8182/8178~9 http://www.dwe. daewoo.co.kr PRINTED DATE: APR.1999...

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