Service Manual FLOOR STANDING AIR CONDITIONER Model: DPB-280LH DAEWOO ELECTRONICS CO., LTD. OVERSEAS SERVICE DEFT.
Contents CONTENTS 1. Installation Guide...........................................................................................2 2. Specification..................................................................................................5 3. Outline..........................................................................................................6 4. Operation .....................................................................................................8 5. Circuit Diagram...........
1. INSTALLATION GUIDE 1 INSTALLATION PLACE ◆Indoor unit ◆Outdoor unit • Flat and strong place in the room • No obstacles in front of air in/out grille • Easy place to connect drain hose to outside of room • Easy place to connect copper tube with outdoor unit • Secure enough distance from neighboring objects as shown below. • Secure enough distance from neighboring objects as shown below.
3 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) 2 1 4 INSTALLATION OF OUTDOOR UNIT 1) Cushion rubbers absorb vibration of outdoor unit 2) The unit must be grounded for safety in accordance with local electrical codes.
3 2 1 Y N L N L Spec 1.25mm2 1.25mm2 1.25mm2 1.25mm2 1.25mm2 1.25mm2 1.25mm2 2.0mm2 2.0mm2 2.
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3. OUTLINE 1 INDOOR UNIT ◆DPB-280LH 4 5 3 2 7 6 1 No 1 2 3 4 5 6 7 Part Name Connecting Hole Evaporator Suction Grille Discharge Grille Fan Blower Joint (Gas) Joint (Liquid) Quantity 3 1 1 1 1 1 1 Description ø60X100 (Left, Right, Back) Heat Exchanger Air Inlet Air outlet Sirocco Type OD ø15.88mm OD ø9.
2 OUTDOOR UNIT ◆DPB-280LH No 1 2 3 4 5 6 7 8 9 10 Part Name Service Valve (Liquid) Service Valve (Gas) Service Door Fan Guard Fan Blower Condenser Fan motor Compressor Earth Bolt Connection Hole Quantity 1 1 1 1 1 1 1 1 1 1 Description OD ø9.52mm Flare Type OD ø15.
4. OPERATION 1 PARTS OF NAME AND FUNCTION Indoor Unit AIR OUT - According to the operation mode, it is opened/closed automatically. MAIN CONTROLS/ REMOTE SENSOR O AUT DE MO AIR IN F /OF ON D EE N SP FA ER P EE TIM SL N DIR R/ EL TE NC EN CA FA - It is to suck warm air. - There is an air filter inside this grille. • The method to open the air suction grille Pull the upper side of grille with both hands. . FA N DIR ILD O/M RB TU .
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 (ONLY HEAT PUMP MODEL) ON/OFF BUTTON - Whenever you push this button. It repeats on -> off -> on -> off.
Outdoor Unit OUTDOOR UNIT AIR OUT SERVICE VALVES(GAS TUBE) SERVICE VALVES(LIQUID TUBE) CAUTION • Do not install the outdoor unit on unstable place like outside wall of building or outside of balcony. In case of falling, it may cause serious trouble and damage. OUTDOOR UNIT AIR IN - If there is any obstacle in front of the grille, the efficiency of the unit can be lowered.
2 REMOTE CONTROLLER Name of Each Button Display Displays information pertaining to unit. AUTO FAN SPEED Button Press to select the fan speed (Auto, High " ", Middle " ", Low " ", Natural). MODE Button Press to cycle through the modes (Auto/Quick/Cool/Fan/Dehumidifier/ Heat) ON/OFF Button Press to turn the unit on or off. TEMPERATURE Buttons Press to raise or lower the desired temperature. MODE FAN SPEED SLEEP FAN DIR. FAN DIR. Button Press to select up/down direction for fan. FAN DIR.
3 REMOTE CONTROLLER DISPLAY MODE Indicators (Auto/Quick/Cool/Fan/Dehumidifier/Heat) Lights to indicate the mode selected. AUTO FAN Indicators Lights to indicate the fan speed. FAN DIRECTION Indicators Lights to indicate the fan direction. NATURAL Indicator Lights to indicate the speeds simulating a breeze. TIMER Indicators Lights to indicate the timer function mode. TEMPERATURE & RESERVATION TIME lndicator Lights to indicate the temperature or time.
4 DESCRIPTION OF FUNCTIONS OFF-Timer If you set time in OFF-Timer Mode, the unit will stop at the set time. ON Unit ON Unit OFF OFF SET Time HOUR ON-Timer If you set time in ON-Timer Mode, the unit will run at the set time.
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.
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. DT DT +0.5°C +0.5°C –0.5°C +0.5°C –0.5°C –0.5°C 0 0.5 1.0 HOUR 0 (COOLING CYCLE) 0.5 1.0 HOUR (HEATING CYCLE) (3) To cancel sleep mode, press the SLEEP button again or press the MODE button once.: the SLEEP indicator will disappear in the display.
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.
Dehumidification Mode 1 DT+1˚C < RT Outdoor Fan, Compressor : ON Indoor Fan : Low speed 2 DT-1˚C < RT < DT+1˚C Outdoor Fan, Compressor : 3 min/ON, 5 min/OFF Indoor Fan : Low speed 3 DT-1˚C > RT Outdoor Fan, Compressor : OFF Indoor Fan : Low speed Air Discharge Direction 1. Press fan direction button to select fan direction • Press desired fan direction button, "UP • DOWN" or "LEFT • RIGHT" control louver moves, press again to stop FAN DIR. FAN DIR.
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2 MAIN ELECTRIC PARTS ◆ DPB-280LH Object/part No.
3 PCB CIRCUIT DIAGRAM 20
NO Part Code Part Name Quantity 1 3108803400 PIN 3 GP881206-2(187) 2 5FVLB3152L FUSE 1 250V 50T 3.
NO Part Code Part Name Quantity 33 RD-2K200J- RESISTOR 1 1/2W-20J 34 RD-2K390J- RESISTOR 2 1/2W-39J 35 RD-2K121J- RESISTOR 5 1/2W-150J 36 RD-2K102J- RESISTOR 1 1/2W-1KJ 37 CLV-B3104M C-LINE ACROSS 1 275V 104K 38 4EFR-37071 SNUBBER 1 0.
4 PCB DRIVING DESCRIPTION Power Supply(1) AC 220V FUSE1 12V VAR D1 275V 104K D2 CC1 CE1 IC2 7812 CC2 5V CE2 + 3.15A D4 D3 104 G VI VO + 104 35V 1000µF 25V 470µF IC3 7805 VI VO CC3 G CL1 CE3 + 104 16V 100µF 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.
Sensor(3) Room temperature and Evaporator temperature Sensor Input CN10 EVA PT-K43C Room 1 2 3 4 5V R32 5 R37 12.7K 23 MICOM 330 CA1 104 MUX SMW250-04 R31 PT-K43C 1 330 R38 12.7K CA1 104 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 (12.7KΩ) and R38 (12.7KΩ). Relation between temperature and voltage is following Table 3-1. CA1 is Noise filter.
Triac Driving(4) 12V N L1 1 TLP561 1 PT1 32 7 L 130µH 3A MICOM T1 SM3JZ47 IC4 KID 65004 AC 220V 2 SN1 0.1µF 120Ohm 2 10 R2 TO MOTOR 1K 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. (Ref. Fig 4-1) SN1 is Snubber.
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. 9ms 4.5ms 16bit 24bit 8bit 16bit 0.56ms LEADER CODE CUSTOM CODE DATA CODE CHECK SUM TAILER 1.12ms bit 0 1.69ms 2.25ms bit 1 Fig 5-2 BIT STRUCTURE Fig 5-1 26 0.
Micom Power Supply(7) 5V VDD 42 CE4 10µF 16V + CC5 104 41 MICOM OSC 8MHz 40 39 19 20 21 VSS 22 CC7 104 DESCRIPTION MICOM Power is supplied 5V at Number 42 using VDD, Number 19, 20 Using Oscillator, CC7 is noise filter.
Reset(8) 5V R4 5.6K IC6 7042P + CE5 4.7µF 50V MICOM 18 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.
Function Selecting(9) R22 27 26 MICOM 25 JS1 R23 JS2 R24 JS3 R25 JS4 24 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.
Zero Crossing Detect(11) VCC R5 10K 2 TR2 KRC102M D5 2 1 R6 1K MICOM 31 3 R3 5.6K 1 D6 2 TRANS OUTPUT 1 CC8 103 2 1 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.
Stepping Motor Driving(12) 12V CN11 1 IC4 MICOM B+ 2 9 3 Ø1 10 4 Ø2 11 5 12 6 M1 FOR SWING Ø3 Ø4 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.
MICOM Display Output 1 P77(HSO) VDD 42 2 P76(HSCK) (XTOUT)P22 41 3 P75(SO) Key Input (XTIN)P21 40 4 P74(SI) (INT5/STOP)P20 39 5 P73(SCK) P17 38 6 P72(PDO/PWM) P16 37 Compressor Heater Driving 7 P71(INT4) (TC2)P15 36 8 P70(INT3/TC3) (PPG)P14 35 Outdoor Unit Motor Driving 9 P07 (DVO)P13 34 Buzzer Driving 10 P06 (INT2/TC1)P12 33 Remocon Input 11 P05 (INT1)P11 32 Indoor Unit Motor Driving 12 P04 (INTO)P10 31 Zero Crossing Detect 13 P03 (AIN7)P67 30 Display Driving 14 P02 (AI
DARLINGTON ARRAYS (KID65004) 16 OUT 1 15 OUT 2 14 OUT 3 13 OUT 4 12 OUT 5 11 OUT 6 10 OUT 7 9 COMMON FREE WHEELING DIODES COMMON INPUT OUTPUT 10.5K‰ 7.2K‰ 3K‰ IN1 1 IN2 2 IN 3 3 IN 4 4 IN5 5 IN6 6 IN7 7 GND 8 GND VOLTAGE REGULATOR (KIA7805AP-5VDC) SCHEMATIC DIAGRAM INPUT 100K 100 100 500 10K 240 200 3.3 K 1 2 3 1.4 K OUTPUT 2K 6K 2.7 K 0.3 0.19K 28K 30pF 5K 500 6K 1K 5K Fin 2 is ground for Cose 221A. Case is ground for Case 1.
RESET IC (KIA 7042P) 1 VCC KIA70 42P 3 OUT 2 GND INPUT GROUND OUTPUT OUTLINE 34
6. REFRIGERANT CYCLE INDOOR UNIT OUTDOOR UNIT HIGH PRESSURE SWITCH INDOOR HEAT EXCHANGER M UNION FAN M SERVICE VALVE FILTER OUTDOOR HEAT EXCHANGER DISTRIBUTER COMPRESSOR CAPILLARY TUBE Note) If the pipe length exceeds the standard length, add 30g of refrigerant per extra meter. Contents Model Name Capillary tube(내경×L×수량) Cooling Heating IDØ1.4 x 1000mm(6.0l/min) x 5EA ODØ2.
Trouble Is the unit display normal? Is the power applied to the unit Outdoor unit does not run?(note. 1) Is the power normal? check the voltage between L & N of terminal block Does the compressor run normally? NO YES NO YES Check the failure code according to the self diagnostic (note 2) Check the wiring of indoor YES press the power ON/OFF button on remote controller YES Is the unit display mormal? NO 36 7.
1 Neither Indoor Unit nor Outdoor Unit Runs The power is applied to the unit Rating voltage under 90% Check the voltage between L and N of terminal block Check the Breaker or Fuse Rating voltage more than 90% No Check the indoor unit display is the display all off? Yes Press the ON/OFF switch of Remote Control No Self Diagnostic function is ON Yes No Check according to self Diagnostic function Is the indoor unit display all off? Control P.C.
2 Outdoor Unit Runs but Indoor Unit Do Not Run Check rotation of indoor fan NO Check the Fan Motor bearing and fan Rating voltage Check the power P.C.B. Rotate indoor fan by hand YES Check input Voltage of Fan Motor connector at power P.C.
3 Outdoor Fan Do Not Run Check the voltage between L and N of outdoor unit terminal Rating voltage Check the voltage between L and N of indoor unit terminal Rating voltage Check the voltage between L and 2 of outdoor unit terminal Rating voltage under 90% under 90% under 90% Check outdoor fan motor individually 39 Check the connecting wire Check the wiring and voltage within doors Check the connecting wire
4 Only Compressor Do not Run - Check the following at cooling mode Rating voltage Check the voltage between N and Y of outdoor unit terminal less than 90% Check the connecting wire between indoor and outdoor. Rating voltage more than 90% Rating voltage Check the voltage between N and Y of indoor unit terminal less than 90% Check the control P.C.B the circuit for relay driving. Rating voltage more than 90% Check the magnetic contactor NG Change the magnetic contactor.
5 REMOTE CONTROLLER ASSMBLY FUNCTIONAL TEST METHOD TEST START No Power supply again Power Supply Is Display at the beginning ON? Select ON/OFF button Yes Is Display at the beginning ON? No Select Mode button Is it normal? No ERROR Select FAN SPEED button Is it normal? Select FAN DIR. button Is it normal? Is display at the begining ON? Select TEMP. Button (▲,▼) Is it normal? No ERROR ▲ (▼) No ERROR No ERROR (Whenever you selectted Temp.
Is LCD display OFF? No ERROR Select TIMER ON Button Is it normal No ERROR Select Timer Enter Button TIMER display? No ERROR Select CANCEL Button Is all display OFF? No ERROR Select ON/OFF Button Select OFF (Timer) Button Is it normal? (0.
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NO Part Code Part Name 1 3100090100 ASSY CABNET BODY 1 2 3100042301 BASE MOTOR ASSY 1 3 3100602801 BRACKET PAN DRAIN 1 4 3108008600 MOTOR IDU 1 5 3101501900 CUSHION MOTOR 3 6 3106600210 SCROLL HOUSING 1 7 3106903100 CAPACITOR MOTOR IDU 1 8 3100025000 BLOWER ASSY 1 9 3105200300 WASHER STOPPER 1 10 3100301600 BASE 1 11 3101501100 CUSHION BASE 4 12 3100503901 BOX CONTROL 1 13 3104398800 ASSY MAIN PCB 1 14 5EPK560120 TRANS 1 15 3100042501 PAN DRAIN AS
NO Part Code Part Name 33 3100604800 BRACKET FRONT R 1 34 3102201600 FRAME DISCHARGE 1 35 310P40086E SWING MOTOR ASSY 1 36 3108005300 MOTOR STEPPING 1 37 3101101300 CASE MOTOR 1 38 3100702100 BUSHING MOTOR 1 39 3106501430 BLADE HORIZONTAL 1 5 40 3106501530 BLADE HORIZONTAL 2 1 41 3107801000 LINK GUIDE R 1 42 3107802200 LINK M 1 43 3106700100 CAM 1 44 3106301100 BAR VERTICAL 1 45 3106503000 BLADE VERTICAL 6 46 3101203400 PUSH MOUNT TIE 2 47 31014080
2 OUTDOOR UNIT
NO Part Code Part Name 1 3100041704 BASE PAN PAINT ASSY 1 2 3107103000 COMPRESSOR ASSY 1 3 3107103200 CUSHION COMP 4 4 7400208411 WASHER PLAIN 4 5 7392801211 NUT LOCK 4 6 3102800300 CRANKCASE HEATER 1 7 3100031223 CONDENSER ASSY 1 8 3102402100 GRILLE COND 1 9 3100041100 GUIDE POST P/T ASSY 1 10 3100041201 BRK SERVICE P/TAS 1 11 3105401300 SERVICE VALVE G 1 12 3105401200 SERVICE VALVE L 1 13 3106002300 BOLT HEX 4 14 3100086810 PIPE REVERSING ASSY 1 1
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.
