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Daewoo FRU-5711-FRS-U20DA Series, Service Manual

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37

1. Circuit Diagram

#14

≒

12V

#12

≒

12V

#10

≒

12V

#14

≒

0.7V

#12

≒

0.7V

#10

≒

0.7V

IC7

#3

≒

0V

#3

≒

5.0V

Relay 3

Louver Heater

OFF Condition

ON Condition

#5

≒

0V

#5

≒

5.0V

Relay 5

D-Heater

Relay 1

Control Mode

Method

IC7

IC ULN2004

Output pin

#1

≒

5.0V

MICOM Port

#1

≒

0V

MICOM Port

Comp

IC ULN2004

Output pin

Control

CONTENTS

REMARKS

5-3. Relay Function

■

. FRS(N)-U20IA

2. How it works;

IC1

(MICOM)

Comp

D-Heater

Louver Heater

D-Heater

Louver Heater

Comp

R-Lamp

F-Lamp

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Summary of Contents for FRU-5711-FRS-U20DA Series

Page 1: ...y 2005 4 Caution In this Manual some parts can be changed for improving their performance without notice in the parts list So if you need the latest parts information please refer to PPL Parts Price L...

Page 2: ...Failure 9 2 Freezer Compartment 9 3 Refrigerator Compartment 9 4 Operation Noise of Refrigerator 9 5 Door 10 COOLING CYCLE HEAVY REPAIR 10 1 Summary of Heavy Repair 10 2 Precaution during Heavy Repai...

Page 3: ...em 7 Make sure the hook is correctly engaged Remove dust and foreign materials from the housing and connecting parts 8 Do not fray damage machine heavily bend pull out or twist the power cord 9 Please...

Page 4: ...3 2 EXTERNAL VIEWS 2 1 External Size FRS N U20IA...

Page 5: ...4 FRS N U20DA FRS N U20EA...

Page 6: ...5 FRS N U20FA FRS N U20GA...

Page 7: ...case 5 Freezer case 9 Refrigerator shelf 4 Freezer shelf 8 Chilled case 3 Ice tray 7 Refrigerator light 2 Freezer pocket 6 Dairy pocket 1 Freezer light Refrigerator Compartment Freezer Compartment 2...

Page 8: ...ase 6 Freezer case 11 Refrigerator pocket 5 Freezer pocket 10 Movable egg case 4 Freezer shelf 9 Refrigerator shelf 3 Water Ice dispenser 8 Refrigerator light 2 Freezer light Refrigerator Compartment...

Page 9: ...tor case 6 Freezer case 7 Dairy pocket 1 Ice cubes storage case 14 Magic cool zone 11 Movable egg case 5 Freezer pocket 10 Refrigerator shelf 4 Freezer shelf 9 Shelf wine option 3 Water Ice dispenser...

Page 10: ...orage case 13 Refrigerator case 11 Movable egg case 5 Freezer pocket 10 Homebar pocket 4 Freezer shelf 9 Refrigerator shelf 3 Water Ice dispenser 8 Refrigerator light 2 Freezer light Refrigerator Comp...

Page 11: ...ovable egg case 6 Freezer case 7 Dairy pocket 1 Ice cubes storage case 15 Magic cool zone 11 Homebar pocket 5 Freezer pocket 10 Refrigerator shelf 4 Freezer shelf 9 Shelf wine option 3 Water Ice dispe...

Page 12: ...i Refrigerator 903 mm x 734 5mm x 1790 mm 104kg 339 Li 198 Li 537 Li FRS N U20IA External Dimension Width x Depth x Height Weight 334 Li Refrigerator 170 Li Freezer 504 Li Total ISO Storage Volume Li...

Page 13: ...or AC250V 10A 77 Fuse Temp Defrost AC250V 12A Main Fuse Power cord P A R T S E L E C T R I C A L Homebar Heater AC220V 5W Dispenser Heater AC220V 8W Louver Heater AC220V 7W Main Duct Heater AC220V 192...

Page 14: ...successive temperature mode 3 Initial mode by power input 3 Whenever pressing button setting is repeated in the order of Medium 3 Medium Max 4 Max 5 Min 1 Medium Min 2 INPUT CONTROL OBJECT CONTENTS R...

Page 15: ...chosen the icon FREEZER QUICK is ON After six month LED ON FILTER CHANGE ICON Dial ICE MAKER LOCK ICON Dial LOCK ICON Dial WATER CUBED ICE CRUSHED ICE ICON Always ON FUZZY DEODORIZER ICON Dial SUPER...

Page 16: ...y pushing ICE MAKER LOCK button again ICE MAKER LOCK icon is off WATER icon is on 8 RESET WATER FILTER button 1 The normal ICON OFF is on for 6 month after are first power input 2 After sic months ico...

Page 17: ...fan R fan Heater etc OFF Fan Delay 1 Time 5 minutes Comp ON and F fan R fan Heater OFF 4 2 Defrost Mode 2 The defrost mode start with the following conditions 1 Total operation time of comp becomes 6...

Page 18: ...ng time is over 24 hours Total time is over 60 hours Comp operating time is over 6 hours End Defrosting start Comp operating time is over 2 hours Any error NO YES NO NO YES Total door open time is ove...

Page 19: ...p ON F fan R fan Heater OFF Pause Fan Delay Heater Defrosting 2 How to start 1 Push REF TEMP button 5 times while pushing FRZ TEMP button simultaneously FRS U20IA 2 In LOCK mode push REFRIGERATOR SET...

Page 20: ...by R door switch ON OFF For 10 minutes after sensing door open the lights turn off automatically through door close is not sensed 2 Control of freezer compartment lights F Light turn ON OFF by F door...

Page 21: ...wer in again INPUT CONTROL OBJECT CONTENTS REMARKS 1 FRZ TEMP 2 Door Switch Comp F R Fan Heater 4 8 Demonstration 1 Start Push ICE WATER button 5 times while pushing FREEZER SET button simultaneously...

Page 22: ...4K R37 In case of weak ref cut J1 or J18 to down the standard resistance by 1 5deg 2K R38 In case of weak ref cut J2 or J19 to down the standard resistance by 1 5deg 2K 4 9 Compensation of R sensor ON...

Page 23: ...tton at the error display mode REF LED 1 is on and off twice Forced defrost mode for A S REF LED 1 is on Full Down mode REF LED 1 is on and off EEPROM defective REF LED 2 is on and off Return after de...

Page 24: ...for more than 1 hour Control Deletion of function related door switch sensing If door switch open close is sensed the error is terminated automatically 6 Cycle error Cause in case comp works for over...

Page 25: ...Push LOCK button 1 time 2 It stops automatically in 4 minutes from the start 3 All the error Codes are reset if they turn to be normal 4 Error code INPUT CONTROL OBJECT CONTENTS REMARKS Temperature Co...

Page 26: ...ull down Check point Measure the voltage of A part on the Main PCB If the voltage is 0 5V 4 5V it is normal If the voltage is 0V short or 5V disconnected change the RT sensor on the Main PCB How to re...

Page 27: ...5min after water supply doesn t go up Check the I sensor or water supply line 12 ES error MICRO switch error Cause When it senses 1min continuously Check the MICRO switch of the dispenser 14 Eu error...

Page 28: ...ent A S Function INPUT CONTROL OBJECT CONTENTS REMARKS Each button Resistance of R sensor Mid ON OFF Point WATER ICE ICE MAKER LOCK 5 times Ice maker test WATER ICE RESET WATER FILTER 5times EEPROM cl...

Page 29: ...ing 1 Press TEST switch under the Icemaker for more than 1 second and test starts Test mode starts from ice separating mode In case test switch has an error of short test is done only once START Ice m...

Page 30: ...l Operation proceeds to Ice making mode Ice separating and water supply Modes stop 5 Crusher Function It stops operation when freezer door is open It operates if freezer door is closed 2 Ice making mo...

Page 31: ...used to verify level switch error 2 The rotation of motor is sensed at each zone 3 In case of level switch error ice separation is done by time 4 If ice separating motor has error the mode stop 4 Wat...

Page 32: ...T CONTENTS REMARKS Dispenser switch WATER ICE Button ICE MAKER LOCK Button Freezer Door Switch Dispenser Lamp Crusher Motor Flap Solenoid Crusher Solenoid Dispenser Water Valve 1 Initial mode water Mo...

Page 33: ...elect button for 2 seconds Initial display sensor temp display if sensor is normal Er display if sensor is disconnected or short Press Select button 1 time OP display forced damper open Press Select b...

Page 34: ...P Lamp D P Lamp D P Lamp D P S V D P S V D P S V D P S V Flap Flap Flap Flap D A A C D P SW D P SW D P SW D P SW Cube S V Cube S V Cube S V Cube S V D P S V D P S V D P S V D P S V Flap Flap Flap Flap...

Page 35: ...age CE6 CE4 CE3 CE1 MC1 E D C B A Parts A FRS N U20DA EA FA GA B D C E A B C D E Voltage of every part Caution Since high voltage DC310V is maintained at the power terminal please take a measure after...

Page 36: ...Sensing Voltage 24 76 24 05 Resistance High OFF Mid OFF Working Point D sensor 1 It senses return point of defrosting heater 2 How it works 13 Working Temp 3 08V 22 56 Return point of defrosting heate...

Page 37: ...7 Working Temp 2 96V 23 33 Low ON 2 72V 2 83V Sensing Voltage 24 76 24 05 Resistance High OFF Mid OFF Working Point D sensor C 1 It senses return point of defrosting heater 2 How it works 13 Working T...

Page 38: ...tion ON Condition 5 0V 5 5 0V Relay 5 D Heater Relay 1 Control Mode Method IC7 IC ULN2004 Output pin 1 5 0V MICOM Port 1 0V MICOM Port Comp IC ULN2004 Output pin Control CONTENTS REMARKS 5 3 Relay Fun...

Page 39: ...0V IC8 7 5 0V Relay 7 Water Dispenser 6 0V 6 5 0V Relay 6 Water Ice 5 0V 5 5 0V Relay 5 Dispenser Solenoid 4 0V 4 5 0V Relay 4 Dispenser Lamp 9 0V 9 5 0V Relay 9 D Heater 8 0V 8 5 0V Relay 8 Geared Mo...

Page 40: ...voltage applied to the fan is determined by the PWM control using the software 2 Explanation for the operation TA7291P is the drive IC for the only DC motor and used for control of the fan motor One...

Page 41: ...40 6 1 Wiring Diagram 6 DIAGRAM FRS N U20IA...

Page 42: ...41 FRS N U20DA EA FA GA...

Page 43: ...42 6 2 Circuit Diagram of Main PCB FRS N U20IA...

Page 44: ...43...

Page 45: ...44 FRS N U20DA EA FA GA...

Page 46: ...45...

Page 47: ...R Sensor R Sensor Inner Controller F Door Switch R Door Switch R Door Switch Freezer Compartment FRS N U20DA Front PCB Dispense r Button Home bar Door Option F Lamp F Fan Motor R Lamp R Fan Motor 7 2...

Page 48: ...D Sensor Temp Fuse Defrost Heater Water Pipe Evaporato r Compressor Condenser Dryer Running Capacitor OLP PTC Water Valve Condenser Fan Motor Tray Drip Power cord 7 3 Evaporator 7 4 Machine Compartme...

Page 49: ...e Cover Guide Cab W Tube A Pull forward Ice Maker Pull forward Hose Ice Maker Tube As Remove Water Hose Heater s 2P housing Check Hose Ice Maker Tube As 2 How to check Hose Ice Maker Tube As How to ch...

Page 50: ...mbly SPEC CRITERION GOOD 11 3 10 10 8 12 7 DEFECTIVE Change the Geared Motor PARTS HOW TO CHECK GOOD 145 8 133 156 DEFECTIVE Change the Cube Sol Valve Check resistance value of 2 terminals with a Mult...

Page 51: ...o Switch CRITERION GOOD DEFECTIVE Change Micro Switch PARTS HOW TO CHECK SPEC NAME VP333A OD 8 VOLTAGE 125V 3A 8 3 Dispenser Micro Switch 1 Disassembling Procedure Check both terminals red circle with...

Page 52: ...CRITERION Good 215 10 193 236 DEFECTIVE 0 Change Sol Valve PARTS HOW TO CHECK GOOD 96 8 88 104 DEFECTIVE Change Flap Heater AS SPEC NAME SOL2003 01B VOLTAGE 220 240V 50Hz VOLTAGE DC 12V 1 5W Check res...

Page 53: ...2 To check normal voltage of each electrical devices to from Mi com Check input output voltage of MICOM and IC7 Fan Power Controller 3 To check input output voltage of Fan 2 Input 5 Output Electric C...

Page 54: ...age of each electrical devices to from Mi com Check input output voltage of MICOM and IC7 8 Fan Power Controller 3 To check input output voltage of Fan Electric Current Fuse 4 To check when each devic...

Page 55: ...ormal OK 8 6 Ice Maker 1 Disassembling Procedure 2 7 Remove 2 screws on top front of ice maker Remove full ice sensing switch and level switch 4 9 Separate Ice Maker Assembly from Frame Ice Maker Remo...

Page 56: ...nge the sensor Full Ice Sensing Switch Check resistance value of 2 terminals with a Multi Tester GOOD DEFECTIVE Change the switch Level Switch Check resistance value of 2 terminals with a Multi Tester...

Page 57: ...n the left side of machine compartment Start Power cord or Fuse is disconnected 1 st power of SMPS is on Main PCB Fuse is disconnected Voltage DC12V 14 5V 5V on Main PCB is OK Wire connection of F PCB...

Page 58: ...Eva And if refrigerant leak is found repair it N N Y Y Y N N Defrost Heater 192W 252 Left lower side of Evaporator 4th pipe from buttom OLP PTC is OK Does Comp work Any Error code on F PCB F C Motor...

Page 59: ...helves and cases in Freezer compartment 1 Removing and replacing Freezer parts Remove 2 screws of Ice Maker Remove the Housing of Ice Maker AS Right side Remove 4 screws of Geared Motor Remove the Hou...

Page 60: ...owly Remove the screw cap on the F Louver A with a flat tip driver Removing and replacing Freezer parts Pull out smoothly the bracket F Lamp AS to remove Remove 3 screws of F Louver A Hold the end of...

Page 61: ...ing and replacing Freezer parts F Louver B Heater Housing D Sensor Housing 1st F Louver B Heater Housing 2nd None 3rd Defrost Heater Housing Temp Fuse Defrost Heater D Sensor Defrost Heater Temp Fuse...

Page 62: ...Y N N Make enough distance between heat appliances and refrigerator Y N N 9 2 2 Ice Formation on F Louver Dews are formed on the gasket surface inside F compartment Gasket has a gap between cabinet Do...

Page 63: ...t a flat tip screw driver Into a gap of door switch to pull forward Disconnect the housing and change the switch for a new one 9 2 3 Disconnection breaking of Freezer Lights Wires Freezer light filame...

Page 64: ...Sensor and check connector Y Y N N 9 3 1 Refrigeration failure Foods does not get cool or cold soon Any error mode on F PCB R Motor works OK R Motor is OK Wiring connection Is OK R Sensor is OK norma...

Page 65: ...nection of R door switch is OK 9 3 2 Disconnection Breaking of Refrigerator Lights Wires Change of F Lights Change of F Door Switch Follow the reverse order of disassembling after changing the light I...

Page 66: ...efore storing in the compartment Repair and change R motor Y N Y Y Y N N N N Explain not to open doors too long Y N N N Y 9 3 3 Dews on Refrigerator Compartment Dews are formed on the gasket inside R...

Page 67: ...ge the R check valve Change the R sensor Y N N Y Check the R sensor connection Check the connector to Main PCB N Y Refer to Repair Change of Check Valve Y 9 3 4 Excessive Refrigeration of Vegetable Ca...

Page 68: ...emove Lift up a piece of Check Valve Flap and insert a finger to the valve frame to hold out Removing of Check Valve Remove screws of light cover Hold the bottom of cover and pull forward to remove Di...

Page 69: ...arks Compressor sound is somewhat normal because it works like a heart to circulate the refrigerant in the pipes during the refrigerator operation Rattling or metallic touch sound of motor piston of c...

Page 70: ...the users or customers Remarks Water flowing sound hiss or sizzling sound can make while refrigerant in the pipes is changing from liquid to gas state when comp starts or stops It is normal to the re...

Page 71: ...ator 3 Shaking or trembling Sound of Evaporator 1 2 2 When such a sound is made attach a absorber on the tube including 2 welding points Attach a absorber on point accumulator 1 Check whether evaporat...

Page 72: ...Start Change the fan N Y Set it right not to touch Y N Set it right not to move Y N Change the motor assembly N Y Explain to the customers how fan is working to circulate cold air in the compartments...

Page 73: ...Fastening of Fan Motor 1 Check if fan motor frame of the assembly is fastened tightly with screws to the liner wall Unless it is tight vibration of shaking can make 1 Check if sealing sponge on the in...

Page 74: ...a much bent point on the pipe Start Separate the touching pipes if any N Y Apply cushion material between Comp base and Tray drip Y N Move or change the points of vibration absorber rubbers on the pi...

Page 75: ...or insertion to Main PCB is OK N Repair the defective connection Y Door switch itself is OK N Change the switch N Y Check it up Door switch is pushed well Y Attach a thin pad on the door liner or chan...

Page 76: ...ty Bombe mass cylinder refrigerant manifold gauge electronic scales punching off flier gas welding machine Weigh and control the bombe in a vacuum conditions with electronic scales and charge through...

Page 77: ...when repairing pipes and injecting refrigerant Replacement of drier 1 Remove retained refrigerant more than 5 minutes after turning off a refrigerator If not oil will leak inside 2 Remove retained ref...

Page 78: ...ter assembling a drier When replacing a compressor Weld and parts by blowing nitrogen to the low pressure side Note For other parts nitrogen blowing is not necessary because it does not produce oxidiz...

Page 79: ...e weight of refrigerant charged into the bombe by subtracting the weight of an evacuated bombe 4 Refrigerant charging Compressor Evaporator Dryer Condenser Vaccum Pump Hot Pipe Blue Yellow Red High Pr...

Page 80: ...ork 6 Pipe arrangement in each cycle 10 4 Standard Regulations for Heavy Repair 1 Observe the safety precautions for gas handling 2 Use JIG or wet towel in order to prevent electric wires from burning...

Page 81: ...r Welding Ag 35 Hot Pipe F R Evaporator Condenser I Pipe Accumulator Suction Pipe Dryer Capi Tube Pipe Suc Conn Pipe Conn B Compressor Flow of Refrigeration Cycle Compressor Pipe Conn B Wire Con Pipe...

Page 82: ...epth Height 903mm X 734 5mm X 1790mm Find a suitable place to install Sufficient space from refrigerator back to the wall for free air ventilation Avoid direct sunlight Once the installation place is...

Page 83: ...hinge bolt counterclockwise Disconnect the harness wires 4 Lift up the front of hinge to remove After the hinge is removed the door can fall down forward Be careful 5 Be careful not to damage the wate...

Page 84: ...front to the top hole of door 4 Turn the hinge fastener tightly to The end Connect harness wire and screw ground wire 5 Insert the water tube far into the coupling Replacing Refrigerator Door 1 Insert...

Page 85: ...floor beneath the refrigerator is uneven freezer and refrigerator doors look unbalanced Insert a screw driver flat tip into a groove of the right wheel bottom of refrigerator and turn it clockwise un...

Page 86: ...ing tape to every connection of pipes tubes to ensure there is no water leak 8 The water tube should be connected to the cold water line How to install Water Line 1 Join connector to water tap Install...

Page 87: ...Water tube Be careful to follow the direction of the nut 3 Insert the Water Tube into the top of Water Valve turn the nut clockwise to fasten it The Water valve is to the right of the motor 4 Check f...

Page 88: ...87 11 5 Dispenser Water Flow...

Page 89: ...R GUIDE CAB W T A HIPS 1 1 1 1 17 3011202000 CLAMP WATER TUBE A PA 66 5N 2 2 2 2 18 3019974800 S PAER FILTER WATER AS FR S660CW 1 1 1 1 19 301292400 3 HINGE U R AS P O T5 0 PAINT 1 1 1 1 1 20 30129239...

Page 90: ...1 1 1 47 3018500300 M BELL B PP 1 1 1 1 1 48 3018500200 M BELL A PP 1 1 1 1 1 49 3011834700 FAN ABS OD3 17XD150 1 1 1 1 1 50 3011200500 CLAMP FAN SUS 304 1 1 1 1 1 51 3016808100 DRYER AS C1220T 1 1 1...

Page 91: ...NANO FRAME 3011114600 CASE FRAME 3011114630 CASE NANO FRAME 80 3018701800 DEO ANTI AS W40XT5XL40 1 1 1 1 1 81 3011445900 COVER RETURN DUCT PP 1 1 1 1 1 82 3011446700 COVER VEGETB CASE B GPPS 1 1 1 83...

Page 92: ...0 127V 60Hz 3010658150 MOLD DY 220V 60Hz 3010658110 MOLD DY 220 240V 50Hz 116 3012520510 GUIDE ICE CRUSHER L ABS 1 1 1 1 117 3012517710 GUIDE ICE CRUSHER R ABS 1 1 1 1 118 3011115202 CASE I CRUSHER AS...

Page 93: ...0 110V 15W 138 3010544000 BOX DISPNS I SHUT AS FRU 541D x 1 1 1 1 139 3012406900 GRILLE DISPNS ABS x 1 1 1 1 140 3011494700 COVER DISPNS BOX AS FRU 541D x 1 1 1 1 140 1 30143D5160 PCB FRONT AS FRU 541...

Page 94: ...2 3019026900 POCKET R S FRU 571I 2 3000060510 ASSY R DR FRU 541F 1 1 3000060500 ASSY R DR FRU 571I 1 1 1 161 1 3012318900 GASKET R DR AS PVC 1 1 1 1 1 161 2 3012319300 GASKET H BAR B AS PVC 1 1 300005...

Page 95: ...3018129610 MK4A5Q R1U 3956145250 350VAC 5 3016401170 265RHB S330 3018129600 2 Power Cord Description Part Code Description Part Code 3011304100 3011346701 MP5004 SINGAPORE 3011302870 3011347300 CP 2P...

Page 96: ...686 AHYE ON DONG MAPO GU S E OUL KOR E A C P O BOX 8003 S E OUL KOR E A PRINTED DATE JULY 2005 DAEWOO ELECTRONICS CORP...

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