Contents CONTENTS 1. Specifications ................................................................................................2 2. Outline and Dimensions .................................................................................3 3. Operation .....................................................................................................5 4. Wiring Diagram..........................................................................................18 5. Refrigerant Cycle .....................
1. SPECIFICATIONS ◆DSB-181LH MODEL DSB-181LH ITEM Function COOLING HEATING Class T Power 220~240V/ 50Hz Capacity W 5,110 5,400 Btu/h 17,500 18,500 l/h 2.2 Running Current A 10.8 11.5 Power Input W 2,050 2,230 Starting Current A Dehumidification Electrical Data Compressor Type Rotary Model 2JS350D6BA02 Capacitor 35µF/370V AC Indoor Unit Outdoor Unit Type Cross flow fan Propeller fan Capacitor 1.
Plate ”fi Mounting `⁄˘˙ 453 453 1035 1035 3 REMOCON ˜ `⁄„«…–‚fi‚ Grille Insert ‰˙‡»– ‚Ø– ‚– ‰˙‡»– ‚ ˆ… Body 322 ◆DSB-181LH 1 INDOOR UNIT 2.
Inlet Inlet 277 367 Panel Top Cabinet Outlet 615 Discharge Grille 800 Foot ◆DSB-181LH 2 OUTDOOR UNIT 4 Handle Service Valve
3. OPERATION 1 PARTS OF NAME AND FUNCTION ◆DSB-181LH Indoor Unit Deodorizing Filter Removes bad smells from the air. (Option Filter) Electrostatic Filter Removes dust particles from the air. (Option Filter) Air In Emergency/ Remote Switch Slide to select the desired position. Indoor Cover Sensor Wire Air Cleaning Filters Remote Sensor Removes dust and prohibits germs. Indicators AIR OUT Indicate the AC setting. Fan Direction (Up/Down) Fan Direction (Left/Right) .
●DSB-181LH Indoor Unit Display Switch Panel ■ Remote Control Signal Receiver This place is the part to receive the signal if it receive the signal, you can hear the signal “beep. beep”. EMERGENCY REMOTE Timer Quick Airclean ON ■ There is a switch panel at inside of Front Panel. Timer (Yellow) Lights during the time reservation mode. Quick (Red) Lights during the time Quick Mode. At the time of operating, open the Front Panel. ON (Red) Lights when the operation is going on.
● DSB-181LH Outdoor Unit AC Cover Remove cover to access the AC connection from this unit to the indoor unit. AIR IN Connection Wire Drain Hose COPPER TUBING AIR OUT Service Valves The indoor and outdoor units are connected by copper tubes which are connected here. Grounding Screw Ground the unit here.
2 REMOTE CONTROLLER ●DSB-181LH Name of Each Button Display Displays information pertaining to unit. AUTO ON/OFF Button Press to turn the unit on or off. FAN SPEED Button Press to select the fan speed (High " ", Middle " ", Low " "). MODE Button Press to cycle through the modes (Auto/Quick/Cooling/Fan/Dry) SLEEP Button Press to set the unit for the sleep mode. TEMPERATURE Buttons Press to raise or lower the desired temperature. FAN SPEED MODE SLEEP FAN DIR. FAN DIR.
3 REMOTE CONTROLLER DISPLAY ● DSB-181LH 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 loreeze. TIMER Indicators (Include sleep) Lights to indicate the timer function mode. TEMPERATURE & RESERVATION TIME lndicators 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, normal 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.
Frost Prevention 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 0°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 outdoor fan turn off. 2) Indoor fan operates according to user set speed.
5 Seconds Time Delay of Indoor Fan Motor Wnen the speed of indoor fan motor changes, there is a time delay of 5 seconds at each speed step.
Dehumidification Mode !Desired temperature < Room temperature Outdoor Fan, Compressor : ON Indoor Fan : Low speed @ Desired temperature > Room temperature Compressor : 3 min/ON, 5 min/OFF Indoor Fan : 3 min 30 second/ON, 4 min 30 second/OFF Fan Speed : Ultra low speed # Room temperature < 18°C Compressor : OFF Indoor Fan : 1 min/ON, 7 min/OFF Fan speed : Ultra low speed Air Discharge Direction (1) When you turn on the unit, the flaps move the the position of keeping the room temperature comfortable.
(2) Heating Condition (Room Temperature < 22°C) !Fan Speed: Super high speed @ Air discharge direction: Fixed # Set temperature: 32°C (Fixed) $ Operation Mode: Heating Mode % Compressor and Outdoor Fan ON OFF (Room temperature-32˚C) -1 0 1 Cooling Airflow Prevention When the indoor coil temperature is lower than 30°C, Microcomputer of the unit stops indoor fan to prevent cooling airflow.
Self-Diagnostic Function The control will contain diagnostic test to verify the integrity of the system. (1) Error Code Display Pattern !ON LAMP: ON (Red) LED ON/OFF @ Error Code (Display in Emergency Mode only) ERROR CODE DISPLAY PATTERN ERROR CONTENTS 8 seconds 1 2 0.5 second 8 seconds 0.5 second Room air thermistor, connector Indoor coi l thermister, connector Compressor, Electrical parts of comp.
4.
1 MAIN ELECTRIC PARTS ◆ DSB-181LH PART NAME Indoor Unit Outdoor Unit PART CODE SPEC. QUANTITY Fan Motor 3108000311 IC-9425 DWKC 5A 1 Fan Motor Capacitor 3106995010 1.2µF 450VAC 0.2A 1 Fuse 5FVLB3152L 250V/50T 3.
5. REFRIGERANT CYCLE Note) If the pipe length exceeds the standard length, add 30g of refrigerant per extra meter. Contents Model Name Capillary tube DSB-181LH ID2.0Ø x OD3.0Ø x L700 Charge Quantity ID1.78Ø x OD3.
6. CONTROL BLOCK DIAGRAM ◆ DSB-181LH Operating Mode Unit on lamp Remote Timer lamp Emergency Signal receiver Fan Speed Timer Selection Air-clean lamp Quick lamp Flap Position Operation Temp. Setting ON/OFF SLEEP Room air temp. Turbo/MILD Indoor coil temp.
7. ELECTRIC CIRCUIT DIAGRAM 1 ELECTRIC CIRCUIT DIAGRAM ◆ DSB-181LH 1 Indoor Unit Fan Motor 2 3 L I.D.
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. If the power ON/OFF button is pressed once more, the relay and triac are turn off and the unit stops operation. 3. The unit turns on or off according to the temperature set point by sensing the room air temperature through thermistor. 4.
2 PCB CIRCUIT DIAGRAM
8. TROUBLE SHOOTING Is the unit display mormal? YES NO NO check the failure code according to the self-diagonostic (note 2) Is the unit display normal? YES Outdoor unit does not run?(note.
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. Check following points first. (There are following cases in normal operation) a. Is the temperature set point suitable? b.
Neither Indoor Unit nor Outdoor Unit Runs The power is applied to the unit Rating voltage Check the voltage between L and N of terminal block under 90% 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.
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.
Outdoor Fan Do Not Run Rating voltage Check the voltage between L and N of indoor unit terminal under 90% Rating voltage Check the voltage between L and N of outdoor unit terminal under 90% Check the voltage between L and 2 of outdoor unit terminal Rating voltage under 90% Check outdoor fan motor individually 29 Check the wiring and voltage within doors Check the connecting wire Check the connecting wire
Only Compressor Do not Run - Check the following at cooling mode 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% 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% Check the magnetic contactor NG Change the magnetic contactor.
PCB DRIVING DESCRIPTION
Power Supply (1) POWER TRANS AC 220V VAR C1 DC12V DC5V 7805 CC3 104 + CE3 7812 + CC2 CE2 104 CC1 + CE1 1000µF/35V GND 100µF/16V 470µF/25V 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, and LED Display. AC voltage of secondary Power Transformer is rectified by Bridge Diode, and it is filtering by Main Condensor CE1.
Sensor (2) Room temperature and Evaporator temperature Sensor Input R18 R20 R22 25 24 12.7K x 3 1 2 3 4 R19 330 CC8 ROOM EVA R21 330 CC9 23 MICOM 1 2 R23 330 CC10 O/D DESCRIPTION Number 23, 24, 25 of Micom is Terminal of A/D convertor Input. Room temperature and Indoor coil, Outdoor coil Temperature is sensing by change of Thermister Resistance, Micom is put in 5V by ratio between R18 (12.7KΩ) and R20, R22 (12.7KΩ). Relation between temperature and voltage is following Table 2-1.
Selecting Mode (3) (SELECT S/W INPUT, OUTPUT) R15 1K 13 CN1 Emergency S/W CC6 MICOM DESCRIPTION There are three Mode according to SW position as following Table 3-1. According as port of fixed Micom is Low, the unit is operating as following Table 3-1.
Micom Power Supply (4) 5V 42 MICOM 22 C6 + + CE2 47µF/16V CC1 104 10µF/16V 21 DESCRIPTION MICOM Power is supplied 5V at Number 42 using Digital, Number 22 using Reference of A/D Converter. CE2 is Ripple filter and CC1 is Noise filter.
Reset (5) 5V 18 R9 1K R10 5.6K 1 MICOM 104 CC3 3 7042P RESET IC + CE1 2 4.7uF/16V DESCRIPTION Voltage less than about 4.2V put in Micom Termina of Number 18 and then Micom reset. Reset IC detect Power ON and Voltage less than 4.2V, and then send Reset Signal. There is a Manual Reset S/W to reset manually if necessary. Vcc (+5V) 4.2V 4.
Buzzer Driving (6) 12V R4 1K 34 11 6 MICOM KID65004 DESCRIPTION Micom 15 Terminal put out Buzzer Driving Pulse, its output is driving Buzzer through Buffer. Ocillatory Frequency of buzzer is selected by internal Micom. It is set by S/W among 2 KHz, 4.1KHz and 8.2KHz. This unit is setting at 4.1KHz. R4 is Resistance to protect excessing current of Buzzer.
Triac Driving (7) 12V R5 100 L1 L AC220V 1 KID 65004 TRIAC SM3 JZ47 2 TLP560J MICOM 38 R4 1K SN1 0.1µF+120 TO MOTOR DESCRIPTION Number 38 Terminal of Micom is put out Pulse Output, by way of Buffer it is driving Photo Triac K3021PG and then Triac SM3JZ47 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 7-1) SN1 is Snubber.
Oscillation (8) 50 X-TAL 8MHz 49 DESCRIPTION Oscillatory Frequency drive Micom, it is made up 8MHz X-TAL oscillatory Freqency. Ocillatory wave is as following Fig 9-1.
Functional Configuration (9) CA1 Test 30 R14 29 R13 JS5 R12 JS3 MICOM 28 27 R11 RA JS4 Selecting Function is as following Table SHORT OPEN JS6 Skip Comp err detect JS5 Mild High JS4 Heat Cool JS3 50Hz 60Hz 40
9. DISASSEMBLY INSTRUCTIONS 1 INDOOR UNIT ¡ DSB-181LH PROCEDURES PHOTOS 1. Stop the Air conditioner and disconnect the power cord from the wall outlet. 2. Removing the insert Grille and Frame. !Loosen three screws for fixing the the Insert Grille and Frame. (Pull out the frame cap before loosening three screws) (Fig 1) @ Loosen three screws at the Drain Pan. # Remove the Insert Grille and Frame. 3. Removing the Control Box. After doing above procedures: !Disconnect indoor room and coil thermistors.
PROCEDURES PHOTOS 7. Removing the blower. After doing above procedures: !Loosen a screw for fixing holder bearing. @ Remove the blower.
2 OUTDOOR UNIT ¡ DSB-181LH PROCEDURES PHOTOS 1. Basic Procedures !Stop the air conditioner and pull out power plug from wall outlet. @ Remove CABINET TOP COVER. (Loosen ten screws) # Remove CABINET SIDE COVER. (Loosen six screws) $ Remove CABINET FRONT. (Loosen six screws) 2. Removing Fan Motor (Fig 4) !Do basic procedure. (!~$) @ Loosen nut for fixing fan by spanner. # Remove spring washer and plain washer. $ Remove fan. % Remove fan stopper. ^ Disconnect Motor lead wire from control box.
3 EXPLODED DIAGRAM (Indoor Unit) ¡ DSB-181LH 44
¡ DSB-181LH Parts List (Indoor Unit) No PART CODE PART NAME Q'TY 1 3100400101 BODY 1 ABS 2 3107600100 FLAP TOP 1 ABS 3 3107600200 FLAP UNDER 1 ABS 4 3106500400 BLADE VERTICAL 16 ABS 5 3103000500 HOLDER MOTOR R 1 ABS 6 3103000700 HOLDER BEARING 1 ABS 7 3103000600 HOLDER MOTOR L 1 8 3106400100 BEARING OILESS 1 9 3101800200 FAN CROSS FLOW 1 Ø100X861L 10 3102400800 GRILLE LATCH 3 POM 11 3108000311 MOTOR FCU 1 IC-9425 DWKC 5A 12 3102400900 INSERT GRILLE
No PART CODE PART NAME Q'TY 21 3101920000 FILTER PRE L ASS’Y 1 22 3102900500 HINGE R 1 POM 23 3102900600 HINGE L 1 POM 24 3104300100 CONTROL PCB ASS’Y 1 25 3107800100 LINK VER CAM 1 26 3104300300 LED PCB ASS’Y 1 27 3108000100 MOTOR STEPPING 2 MP28GA 28 3108912330 TERMINAL BLOCK 1 DBW-6P 29 3107400300 EVA BRKT L 1 SECC T1.
4 EXPLODED DIAGRAM (Outdoor Unit) ¡ DSB-181LH 37 38 39 47
¡ DSB-181LH Parts List (Outdoor Unit) No PART CODE PART NAME Q'TY 1 3100800101 CABINET BACK 1 SECC T1.0 2 3104200500 PANEL TOP 1 SECC T1.0 3 3100800201 CABINET FRONT 1 SECC T1.0 4 3101800100 FAN PROPELLER 1 ABS+G/F 5 3102400710 GRILLE DISCHARGE 1 PP 6 3100800301 CABINET SIDE 1 SECC T1.0 7 3100300301 PAN BASE 1 SECC T1.6 8 3105300100 SUPPORTER MOTOR 1 SECC T1.0 9 3104200601 PANEL CONTROL 1 SECC T1.
No PART CODE PART NAME Q'TY 21 3105400300 REVERSING VALVE 1 V2-100 22 3100003000 PIPE FILTER ASS’Y 1 CU 23 3109700100 SOLENOID COIL 1 L30-0240 24 3100003100 CAPILLARY ASS’Y 1 CU ¤ß 25 3107130000 COMPRESSOR ASS’Y 1 220-240V 50Hz 26 3105400210 SERVICE VALVE 1 ¤ø 27 3105400100 SERVICE VALVE 1 ¤ 28 5SC0202700 POWER RELAY 1 G7L-2A-TUB 29 3100003400 COIL SENSOR ASS’Y 1 30 3102100700 FOOT CUSHION 4 NR 31 3106000900 COMP BOLT 3 M8 x L46.
5 CONTROL BOX ASSEMBLY ¡ DSB-181LH 1 CONTROL BOX ASSY 50
¡ DSB-181LH Parts List (Control Box Assembly) No PART NAME SPEC Q’TY PART CODE 1 CONTROL BOX ASS’Y DSB-181LH 1 3100058300 2 BOX CONTROL-2 ABS (VERSION2) 1 3100506900 3 PCB TRANS ASS’Y DWA-220V 1 5EPV633110 4 SCREW TAPPING T2S TRS 4X12 MFZN 3 7122401211 5 CAPACITOR IDM EAF-45125 (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.
Service Manual SPLIT SYSTEM AIR CONDITIONER Model: DSB-181LH DAEWOO ELECTRONICS CO., LTD. OVERSEAS SERVICE DEFT.
VISION CREATIVE, INC. `–‚ ·ª ·Á MODEL TEL –˙¿•˜ ‡†·º„fi•˛ 5 ¡ 526 ·º¿ ·” ø 1 6ˆ (0335)329-8225 DSB-181LH BUYER ¿ˇ `⁄ `ƒ ˘˙ –‘ ∞› 1´ 99.4.9 6´ 2´ 99.4.16(…⁄̀ ) 7´ 3´ 99.4.
