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Daewoo DPB-280LH Service Manual Download Page 39

38

2

Outdoor Unit Runs but Indoor Unit Do Not Run

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 Fan Motor

bearing and fan

Check the power P.C.B. 

The circuit for triac control

Change of fan motor

NO

Rating voltage

under 90%

Open or short

YES

Rating Voltage more than 90%

Normal

Summary of Contents for DPB-280LH

Page 1: ...Service Manual FLOORSTANDINGAIRCONDITIONER Model DPB 280LH DAEWOO ELECTRONICS CO LTD OVERSEAS SERVICE DEFT ...

Page 2: ...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 Contents ...

Page 3: ...necessary shield the light No obstacles in front of air in out grille A place having a drain out let Easy place to connect copper tube with indoor unit Secure enough distance from neighboring objects as shown below 1 0 0 c m 5cm 10cm 5 0 c m 1 0 c m 50cm Indoor unit Outdoor unit Lquid Gas 3 8 5 8 A 12 12 4 18 6 19 B 9 52 15 88 Unit mm Nominal diameter Flare specification Lquid Gas 3 8 5 8 Unit mm ...

Page 4: ... 2 CAUTION Use designated diameter and thickness of tube Connect all tube as short as possible and fix firmly Less than 3M of the difference of height between indoor and outdoor unit is desirable Fill up more refrigerant if the connection tube is longer than 5M 50g M The refrigerant volume filled from the factory is suitable for 5M connection Be careful not to let in any dust or motes into the tub...

Page 5: ...s and make it as short as possible Use an exclusive power supply for the air conditioner Use an electricity leakage interrupter having suitable capacity Grounding resistance should be under 100 ohms and the grounding wire should be connected firmly to the terminal of out door unit Wire connection of indoor and outdoor unit When connecting wires of indoor and outdoor unit the numbers of terminal bl...

Page 6: ...t A Type Scroll Model ZR36K3 PFJ 501 Capacitor 50µF 370V AC Indoor Unit Outdoor Unit Type Sirocco Propeller fan Capacitor 5µF 400V AC 8µF 370V AC Motor Model Number DE112 A2935BA010 Control Capillary Charge Q ty g 2 000 Type Flare OD Liquid Suction in mm 3 8 9 52mm 5 8 15 88mm Dimensions W x H x D mm 500 x 1 830 x 350 872 x 675 x 325 Net Weight kg 40 66 Electrical Data Compressor Fan Refrigerant R...

Page 7: ...Part Name Quantity Description Remarks 1 Connecting Hole 3 ø60X100 Left Right Back 2 Evaporator 1 Heat Exchanger 3 Suction Grille 1 Air Inlet 4 Discharge Grille 1 Air outlet 5 Fan Blower 1 Sirocco Type 6 Joint Gas 1 OD ø15 88mm 7 Joint Liquid 1 OD ø9 52mm ...

Page 8: ...D ø9 52mm Flare Type 2 Service Valve Gas 1 OD ø15 88mm Flare Type 3 Service Door 1 4 Fan Guard 1 Fan Protector 5 Fan Blower 1 Propeller type 6 Condenser 1 Heat Exchanger 7 Fan motor 1 Foor propeller fan 8 Compressor 1 Depend on Models 9 Earth Bolt 1 Ground 10 Connection Hole 1 Power Control wire ...

Page 9: ...se toward to the remote sensor AIR OUT According to the operation mode it is opened closed automatically AIR IN 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 MO DE SL EE P ON OF F TIM ER EN TE R CA NC EL FA N SP EE D TU RB O M ILD AUT O FA N DIR FA N DIR ...

Page 10: ...TTON ON OFF BUTTON Whenever you push this button It repeats on off on off AUTO FAN SPEED INDICATOR FAN SPEED INDICATOR COOL MODE INDICATOR QUICK MODE INDICATOR HEAT MODE INDICATOR ONLY HEAT PUMP MODEL MILD MODE INDICATOR DEHUMIDIFIER MODE INDICATOR FAN SPEED BUTTON AUTO LOW MIDDLE HIGH NATURAL TEMPERATURE BUTTONS Each time you push this button temperature goes up by 1 C Each time you push this but...

Page 11: ...e the efficiency of the unit can be lowered 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 ...

Page 12: ...12 16 20 24hr MODE Button Press to cycle through the modes Auto Quick Cool Fan Dehumidifier Heat SLEEP Button Press to set the unit for the sleep mode FAN DIR Button Press to select up down direction for fan FAN DIR Button Press to select left right direction for fan ON OFF Button Press to turn the unit on or off TEMPERATURE Buttons Press to raise or lower the desired temperature FAN SPEED Button ...

Page 13: ... Indicators Auto Quick Cool Fan Dehumidifier Heat Lights to indicate the mode selected TIMER Indicators Lights to indicate the timer function mode TEMPERATURE RESERVATION TIME lndicator Lights to indicate the temperature or time FAN DIRECTION Indicators Lights to indicate the fan direction NATURAL Indicator Lights to indicate the speeds simulating a breeze FAN Indicators Lights to indicate the fan...

Page 14: ...r is running regardless of room temperature If the Indoor Unit Display receive 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 SET Time HOUR ON OFF ON Timer Unit ON Unit OFF SET Time HOUR ON OFF Control of Room Temperature Buzzer COMP ON RT ROOM TEMPER...

Page 15: ...ation 4 Automatic Operation If the unit is set in AUTO mode the unit operates automatically according to the room temperature to keep the room temperature comfortable 0 C L M H 1 C 2 C RT DT L H M 0 C 1 C 2 C 3 C DT RT COOLING HEATING FAN ONLY COOL DEHUMI AUTO QUICK HEAT DIFICATION H H H L H H H M M M L M H M L L L L L H L Auto X Auto L Auto H Auto Natural Natural Natural L Natural H Natural ...

Page 16: ...evention of Indoor Unit When the unit operates at low ambient temperature frost may appear on the Evaporator When the indoor coil temperature is lower than 2 C at the end of 10 minutes of 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 compressor and ou...

Page 17: ...r stops running over 30 minutes then the unit selects operating Mode again 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 ROOM TEMPERATURE DT 3 C RT DT 2 C RT DT 2 C DT 2 C RT OPERATING MODE Cooling Dehumidifier Heating RT Room temperature DT Desired 3 min Time Delay of Compressor In normal operation there i...

Page 18: ...Fan Compressor ON Indoor Fan Low speed 2DT 1 C RT DT 1 C Outdoor Fan Compressor 3 min ON 5 min OFF Indoor Fan Low speed 3DT 1 C RT Outdoor Fan Compressor OFF Indoor Fan Low speed 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 Self Diagnostic Function The control will contain diag...

Page 19: ...18 5 CIRCUIT DIAGRAM DPB 280LH 1 WIRE CONNECTION OF INDOOR AND OUTDOOR UNIT ...

Page 20: ...ctronics Ranco japan Young chang Omron electronics Chung won electronics Triad electronics Pilkor electronics Toshiba electronics Marcon electronics Toshiba electronics Type model ZR36K3 PFJ A2935BA010 DE112 17AM035A5 ST 16 NYM 16H 1 MSFCC20F02 37H08500B PEB 958 DTB 8P DWA 5401FN V26110D G7L 2A TUB CS11 12H 50T PCX2 335 TLP560J TNR15G561K SM3JZ47 Technical data AC220 240V 50Hz R22 AC 230V 50Hz AC ...

Page 21: ...20 3 PCB CIRCUIT DIAGRAM ...

Page 22: ...MW250 10 RD 14 D15G561K VARISTOR 1 15G561K 15 DZN4004A DIODE 6 1N4004 TAPE 16 CCXE1H102Z C CERA 1 102Z 50VDC 17 CCXE1H103M C CERA 1 103Z 50VDC 18 CCXE1E104M C CERA 8 104Z 25VDC 19 CDXE1H104M C MULTI 1 104Z CR0561B Z5U 20 CEXE35338M C ELEC 1 3300uF 35V SD 21 CEXE1V108C C ELEC 1 1000uF 35V SD 22 CEXE1E477C C ELEC 1 470uF 25V SD 23 CEXE1C106C C ELEC 1 10uF 50V SS 24 CEXE1C475C C ELEC 1 4 7uF 50V SS 2...

Page 23: ...0 BUZZER 1 DP 2520BA 42 52C131J003 COIL 1 130uH 3A 43 3109400100 JUMPER 32 10mm 44 3109400100 JUMPER OPTION 1 10mm 45 3104398700 PCB MAIN 1 162X169 46 5SC0101128 RELAY 5 CS11 SH12 47 1KA7812AP IC REGULATOR 1 KIA7812P 48 1KA7805AP IC REGULATOR 1 KIA7805P 49 TKRC102M TR 2 KRC102M 50 1KA7042P IC RESET 1 KIA7042P 51 4850103610 RESONATOR 1 CST8 00MGW 52 TSM3JZ47 TRIAC 1 SM3JZ47 53 1TLP560J PHOTO COUPLE...

Page 24: ...gulated 12V DC by Regulator IC7812 And it is regulated 5V DC by Regulator IC7805 VAR is serge filter and CC1 CC2 CC3 is Noise filter AC 220V CL1 275V 104K VAR FUSE1 3 15A POWER TRANS D2 CC1 CE1 D3 D1 D4 104 35V 1000µF IC2 7812 VI VO G IC3 7805 VI VO G 25V 470µF CC2 CC3 CE3 CE2 104 16V 100µF 104 12V 5V Oscillator 2 19 OSC CC13 104 5V 8M 20 VDD 10 VSS 10 Fig 2 1 DESCRIPTION Oscillatory Frequency dri...

Page 25: ...20 1 059 1 118 1 157 1 196 1 255 1 294 1 353 1 412 1 451 1 510 1 569 1 608 1 667 1 725 1 784 1 843 1 902 1 961 2 000 2 059 2 118 2 176 2 235 2 294 temp C 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 resistance1 Ω 14 288 13 629 13 002 12 405 12 021 11 468 10 939 10 432 9 947 9 634 9 182 8 890 8 467 8 060 7 79 7 415 7 168 6 809 6 577 6 239 6 020 5 806 5 597 5 392 ...

Page 26: ... 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 N L AC 220V TO MOTOR T1 SM3JZ47 L1 1 1 2 2 130µH 3A SN1 0 1µF 120Ohm TLP561 PT1 12V R2 1K 1 2W IC4 KID 65004 MICOM 32 7 10 AC220V TRIGGER MOTOR INPUT LOW SPEED MEDIUM SPEED HIGH SPEED Fig 4 1 LOW SPEED MIDDLE SPEED HIGH SPEED ...

Page 27: ...ten 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 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 ...

Page 28: ...CRIPTION MICOM Power is supplied 5V at Number 42 using VDD Number 19 20 Using Oscillator CC7 is noise filter Micom Power Supply 7 VDD 42 CE4 10µF 16V CC5 104 CC7 104 5V 41 40 39 22 21 19 OSC 8MHz 20 VSS MICOM ...

Page 29: ...ut 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 CE5 4 7µF 50V IC6 7042P R4 5 6K 5V 4 25V H L t t POWER ON Vcc 5V DELAY TIME FOR POWER ON RESET ...

Page 30: ...COM 34 6 11 R7 1K BZ Buzzer Driving 10 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 27 26 25 24 R22 JS1 R23 JS2 R24 JS3 R25 JS4 MICOM Function Selecting 9 SHORT OPEN JS1 SIMPLE LCD JS2 132 180 JS3 MILD HIGH JS4 Heat Pump Cool...

Page 31: ...ge Transistor TR2 is used to put in the Micom Detail Driving is as following Fig 11 1 MICOM TRANS OUTPUT D5 D6 R3 5 6K 1 2 CC8 103 TR2 KRC102M 1 2 1 2 3 2 1 R5 10K R6 1K VCC 31 DETECT POINT H The Number 31 of Micom terminal AC18V L Fig 11 1 Zero Crossing Detect 11 ...

Page 32: ...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 IC4 KID65004 CN11 9 MICOM 10 11 12 M1 FOR SWING Ø 4 Ø 3 Ø 2 Ø 1 Fig 12 1 Normal Rotating Reversed Rotating Stepping Motor Driving 12 ...

Page 33: ... SCK P72 PDO PWM P71 INT4 P70 INT3 TC3 P07 P06 P05 P04 P03 P02 P01 P00 TEST RESET XIN XOUT VASS VSS Display Output Key Input Compressor Heater Driving Outdoor Unit Motor Driving Buzzer Driving Remocon Input Indoor Unit Motor Driving Zero Crossing Detect Display Driving Fuction Select Temperature Sensor Input Stepping Motor Compressor Relay Driving Auto Swing Driving 4 way Valve Driving Reset Circu...

Page 34: ...D 8 9 COMMON FREE WHEELING DIODES 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 221A Case is ground for Case 1 10K INPUT GND 10K 300 36K 64K 520 26K 60K 29K 20K 20K 40 pF 50K 50 200 300 200 100 16K 210 012 OUTPUT Pin 1 INPUT 2 GROUND 3 OUTPUT Equivalent ...

Page 35: ...34 RESET IC KIA 7042P KIA70 42P OUTLINE INPUT GROUND OUTPUT VCC 1 3 2 OUT GND ...

Page 36: ...M DISTRIBUTER CAPILLARY TUBE UNION OUTDOOR HEAT EXCHANGER INDOOR UNIT OUTDOOR UNIT M Note If the pipe length exceeds the standard length add 30g of refrigerant per extra meter Contents Model Name Cooling Heating Capillary tube 내경 L 수량 IDØ1 4 x 1000mm 6 0l min x 5EA ODØ2 0 x 250mm Charge Quantity 2000 g ...

Page 37: ... the power normal check the voltage between L N of terminal block press the power ON OFF button on remote controller Does the beeper beep two times Is the display all off Check the connector on display PCB connected to control PCB Check the display PCB itself Check power supply mains or interconnection wires Check the wiring of indoor Does control PCB status LED repeat one second on and off contro...

Page 38: ...on Control P C B defect Check the indoor unit display is the display all off Press the ON OFF switch of Remote Control Is the indoor unit display all off Pull out the power plug and then insert the power plug after 5 second Control P C B is normal Recheck from the beginning Rating voltage more than 90 Rating voltage under 90 No No No Yes Yes 1 Neither Indoor Unit nor Outdoor Unit Runs ...

Page 39: ...tor 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 Fan Motor bearing and fan Check the power P C B The circuit for triac control Change of fan motor NO Rating voltage under 90 Open or short YES Rating Voltage more than 90 Normal ...

Page 40: ...e between and of outdoor unit terminal N L Check the voltage between and of outdoor unit terminal 2 L Check outdoor fan motor individually Check the connecting wire Check the connecting wire Check the wiring and voltage within doors Rating voltage under 90 Rating voltage under 90 Rating voltage under 90 ...

Page 41: ...actor Check the wiring of outdoor 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 the control P C B the circuit for relay driving Rating voltage less than 90 NG Open or Short Rating voltage less than 90 Rating voltage more than 90 Rating voltage more ...

Page 42: ... 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 it normal Is it normal ERROR No ERROR No Whenever you selectted Temp Button it is changed by 1 C 18 32 C Select TEMP Button Select ON OFF button Is display at the begining ON Is it normal ...

Page 43: ...L 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 display at the beginning ON ERROR No ERROR No ERROR No ERROR No ERROR No ERROR No ...

Page 44: ...8 EXPLODED DIAGRAM 1 INDOOR UNIT ...

Page 45: ......

Page 46: ... ASSY MAIN PCB 1 14 5EPK560120 TRANS 1 15 3100042501 PAN DRAIN ASSY 1 16 3100042603 EVAPORATOR ASSY 1 17 3100042802 PIPE DISCHARGE ASSY 1 18 3100042903 PIPE SUCTION ASSY 1 19 3105100400 SPRING SENSOR 1 20 3102707930 HARNESS COIL SENSOR 1 21 3101402700 COVER EVAP L 1 22 3100048310 ASSY COVER EVAP R 1 23 3100043000 COVER EVAP TOP ASSY 1 24 3107000400 CLIP THERMO 1 25 3100087200 COVER HOUSING ASSY 1 ...

Page 47: ...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 3101408000 COVER BOX CONTROL 1 48 3100090200 ASSY COVER TOP 1 49 3102403720 GRILLE SUCTION 1 50 3102500901 GUIDE FILTER L 1 51 3102501001 GUIDE FILTER R 1 52 3107900100 MAGNET 4 53 3104504700 PLATE MAGN...

Page 48: ...2 OUTDOOR UNIT ...

Page 49: ......

Page 50: ...VALVE G 1 12 3105401200 SERVICE VALVE L 1 13 3106002300 BOLT HEX 4 14 3100086810 PIPE REVERSING ASSY 1 15 3100079310 PIPE FILTER ASSY 1 16 3101407900 COMP COVER 1 17 3100031702 PLT PARTITION ASSY 1 18 3104201601 PANEL CONTROL 1 19 3108912340 TERMINAL BLOCK 1 20 5SC0202700 POWER RELAY 1 21 3109508000 CAPACITOR DUAL 1 22 3105300400 SUPPORT MOTOR 1 23 3108008500 MOTOR ODU 1 24 3101802001 FAN PROPELLE...

Page 51: ... 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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