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Daewoo DPB-280LH Service Manual

Other manuals for DPB-280LH: Owner's Manual

Summary of DPB-280LH

  • Page 1

    Service manual floor standing air conditioner model: dpb-280lh daewoo electronics co., ltd. Overseas service deft..

  • Page 2: Contents

    Contents 1. Installation guide...........................................................................................2 2. Specification..................................................................................................5 3. Outline......................................................

  • Page 3: 1. Installation Guide

    2 1. Installation guide 1 installation place ◆ indoor unit ◆ outdoor unit secure enough space from the neighboring objects as shown below. This is required to operate the unit efficiently. • flat and strong place in the room • no obstacles in front of air in/out grille • easy place to connect drain ...

  • Page 4: Installation of Indoor Unit

    3 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) 1) cushion rubbers absorb vibration...

  • Page 5: Electrical Wiring

    4 6 electrical wiring signal line signal line signal line signal line main power (indoor) main power (indoor) main power (indoor) main power (outdoor) main power (outdoor) main power (outdoor) (specification of harness) 3 2 1 y n l n l spec 1.25mm 2 1.25mm 2 1.25mm 2 1.25mm 2 1.25mm 2 1.25mm 2 1.25m...

  • Page 6: 2. Specifications

    5 2. Specifications model dpb-280lh item function cooling heating class t power 220~240v/ 50hz capacity w 8,200 8,200 btu/h 28,000 28,000 dehumidification l/h - - running current a 14 14 power input w 2,800 2,800 starting current a - type scroll model zr36k3-pfj-501 capacitor 50µf/370v ac indoor uni...

  • Page 7: 3. Outline

    4 5 2 7 6 1 3 6 3. Outline 1 indoor unit ◆ dpb-280lh no 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 (l...

  • Page 8: Outdoor Unit

    7 2 outdoor unit ◆ dpb-280lh no part name quantity description remarks 1 service valve (liquid) 1 od 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 ...

  • Page 9: Parts of Name and Function

    8 1 parts of name and function indoor unit 4. Operation main controls/ remote sensor lcd remote controller - operative distance is within 7m from the indoor unit. - use toward to the remote sensor air out - according to the operation mode, it is opened/closed automatically. Air in - it is to suck wa...

  • Page 10

    9 room temperature / desired temperature indicator - it displays current room temperature and desired room temperature. Fan mode indicator auto mode indicator timer/sleep indicator economy mode indicator mode button economy mode button on/off button - whenever you push this button. It repeats on -> ...

  • Page 11: Outdoor Unit

    10 outdoor unit outdoor unit air in - if there is any obstacle in front of the grille, 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 out...

  • Page 12: Name of Each Button

    11 name of each button 2 remote controller mode sleep on/off timer enter/ cancel fan speed turbo/mild display displays information pertaining to unit. Turbo/mild press to be more silent and comfortable room condition timer enter/cancel button press to enter a timer setting or to cancel timer setting...

  • Page 13: Replacing Batteries

    12 replacing batteries 3 remote controller display slide down the cover to access most of the remote buttons. Slide down further to access the battery compart- ment. Insert two “aaa” size alkaline batteries following the polarity diagram below. 1 2 mode indicators (auto/quick/cool/fan/dehumidifier/h...

  • Page 14: Off-Timer

    13 if you set time in off-timer mode, the unit will stop at the set time. If you set time in on-timer mode, the unit will run at the set time. (1) range of setting temperature: 18~32°c (2) setting temperature: operating temperature of compressor (3) during the time of test operating, fan (indoor, ou...

  • Page 15: Fan Speed (Indoor Unit)

    14 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) (4) automatic operation if the unit is set in 'auto' mode, the unit operates a...

  • Page 16: Sleep Mode

    15 (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. (3) to cancel sleep mode, press the sleep button again or press the mode button once.: the sleep indicator wil...

  • Page 17: Auto Mode

    16 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 operating mode according to the room temperature (2) selecting operating mode again room temperature meets desired temperature and the compressor stops run...

  • Page 18: Dehumidification Mode

    17 (1) cooling mode * when the room temperature is higher than 22˚c or equal to 22˚c 1 fan speed: high speed (fixed) 2 air discharge direction: the control is available. 3 set temperature: 18°c (fixed) (1) heating mode * when the room temperature is lower than 22˚c 1 fan speed: high speed (fixed) 2 ...

  • Page 19: 5. Circuit Diagram

    18 5. Circuit diagram ◆ dpb-280lh 1 wire connection of indoor and outdoor unit.

  • Page 20: Main Electric Parts

    19 ◆ dpb-280lh 2 main electric parts object/part no. Motor-compressor outdoor fan motor indoor fan motor thermal protector for fan motor synchronous motor stepping motor dual capacitor for compressor and outdoor fan motor running capacitor for indoor fan motor terminal block transformer reversing va...

  • Page 21: Pcb Circuit Diagram

    20 3 pcb circuit diagram.

  • Page 22

    21 no part code part name quantity specification 1 3108803400 pin 3 gp881206-2(187) 2 5fvlb3152l fuse 1 250v 50t 3.15a 3 3107000600 fuse clip 2 afc-520 4 3108802500 wafer 1 yw396-03avd 5 3108802600 wafer 1 yw396-03avd (rd) 6 3108802700 wafer 1 yw396-03avd (bk) 7 3108802900 wafer 1 yw396-05avd 8 3108...

  • Page 23

    22 no part code part name quantity specification 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 0.1uf 120 300v 39 3105796100 heat shink 1 33(h)x23...

  • Page 24: Power Supply(1)

    23 power supply(1) 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. Ac voltage of secondary power transformer is rectified by bridge diode, and it is filtering by main condensor ce1. Filte...

  • Page 25: Sensor(3)

    24 room temperature and evaporator temperature sensor input 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 Ω ) and r38 (12.7k Ω ). Relation be...

  • Page 26: Triac Driving(4)

    25 triac driving(4) 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)

    26 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. Leader code custom code data cod...

  • Page 28: Micom Power Supply(7)

    27 description 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 10 µ f 16v cc5 104 cc7 104 + 5v 41 40 39 22 21 19 osc 8mhz 20 vss micom.

  • Page 29: Reset(8)

    28 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. Reset(8) micom 18 + ce5 4.7 µ f 50v ic6 7042p r4 5.6k 5v 4.25v h l t t power on vcc (+5v) delay time for power on res...

  • Page 30: Buzzer Driving(10)

    29 description micom 34 terminal put out buzzer driving pulse, its output is driving buzzer through buffer. Ocillatory frequency of buzzer is selected by internal micom. This unit is setting at 2khz. Vcc 12v kid 65004 micom 34 6 11 r7 1k bz buzzer driving(10) description selecting function is as fol...

  • Page 31: Zero Crossing Detect(11)

    30 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. 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...

  • Page 32: Stepping Motor Driving(12)

    31 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 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) (r...

  • Page 33

    32 micom 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 vdd (xtout)p22 (xtin)p21 (int5/stop)p20 p17 p16 (tc2)p15 (ppg)p14 (dvo)p13 (int2/tc1)p12 (int1)p11 (into)p10 (ain7)p67 (ain6)p66 (ain5)p65 (ain4)p64 (ain3)p63 (ain2)p62 (ain1)p61 (ain0)p60 varef p77(hso) p76(hsck) p75(so) p74(si) p73(sck...

  • Page 34

    33 darlington arrays (kid65004) voltage regulator (kia7805ap-5vdc) voltage regulator (kia7812ap-12vdc) in1 1 16 out 1 in2 2 15 out 2 in 3 3 14 out 3 in 4 4 13 out 4 in5 5 12 out 5 in6 6 11 out 6 in7 7 10 out 7 gnd 8 9 common free wheeling diodes common 10.5k ‰ 7.2k ‰ 3k ‰ output gnd input 100k 500 1...

  • Page 35

    34 reset ic (kia 7042p) kia70 42p outline input ground output vcc 1 3 2 out gnd.

  • Page 36: 6. Refrigerant Cycle

    35 6. Refrigerant cycle service valve filter compressor high pressure switch fan indoor heat exchanger 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 nam...

  • Page 37: 7. Trouble Shooting

    36 7. Trouble shooting outdoor unit does not run?(note. 1) does the compressor run normally? Indoor unit does not run(note 1) check the failure code according to the self diagnostic (note 2) is the unit display mormal? Check the failure code according to the self-diagonostic (note 2) normal check th...

  • Page 38

    37 the power is applied to the unit check the voltage between and of terminal block n l check the breaker or fuse self diagnostic function is on check according to self diagnostic function control p.C.B defect check the indoor unit display is the display all off? Press the on/off switch of remote co...

  • 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 aga...

  • Page 40: Outdoor Fan Do Not Run

    39 3 outdoor fan do not run check the voltage between and of indoor unit terminal n l check the voltage 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 t...

  • Page 41: Only Compressor Do Not Run

    40 4 only compressor do not run - check the following at cooling mode check the voltage between and of indoor unit terminal y n check the voltage between and of outdoor unit terminal y n check the magnetic contactor check the wiring of outdoor unit check the compressor (check the winding resistance)...

  • Page 42

    41 5 remote controller assmbly functional test method error no error no error no no no no yes select on/off button select mode button select fan speed button select fan dir. Button power supply test start power supply again check the following battery spring micom pcb lcd is display at the beginning...

  • Page 43

    42 (0.5~24 hour) error no select timer on button select timer enter button select cancel 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 ...

  • Page 44: 8. Exploded Diagram

    8. Exploded diagram 1 indoor unit.

  • Page 46

    44 no part code part name quantity remarks 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 wa...

  • Page 47

    45 no part code part name quantity remarks 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...

  • Page 48: Outdoor Unit

    2 outdoor unit.

  • Page 50

    47 no part code part name quantity remarks 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 pos...

  • 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.