Service Manual IMPORTANT SAFETY NOTICE

Transcription

1 Order No. PHAT070202S3 (Revision : Jul. 20) Service Manual Refrigerator NR-B37MV2 NR-B4MV2 Product Colour Silver (SL) Destination Thailand CFCs have been used in refrigerant as refrigerator and the insulation materials for many years. But it is now known that these compounds which once seemed so ideal for use as cleaning agents and in refrigeration systems, destroy the earth s ozone layer as a result, an international body decided on a total worldwide ban of harmful CFCs by the end of 995. WARNING The service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt within this service information by anyone else could result in serious injury or death. IMPORTANT SAFETY TICE There are special components used in this equipment which are important for safety. These parts are marked by in the Schematic Diagrams, Circuit Board Diagrams, Exploded Views and Replacement Parts List. It is essential that these critical parts should be replaced with manufacturer s specified parts to prevent shock, fire or other hazards. Do not modify the original design without permission of manufacturer. Panasonic Home Appliances (Thailand) Co., Ltd All rights reserved. Unauthorized copying and distribution is a violation of law.

2 NR-B37MV2 / NR-B4MV2 CONTENT Page. Safety Cautions for Repairing. Warning.2 Caution 2. Specification and Components 3. Performance Data 3. NR-B37MV2 3.2 NR-B4MV2 4. Self Protecting Function 4. Protecting for IC 4.2 Protection for compressor locked 4.3 Protection for power supply droping 5. Self Diagnoising Function 6. Temperature Control 7. Refrigerator Instruction Guideline 8. Troubleshooting Guide 8. Not cool at all [ Both PC & FC (compressor does not operate) ] 8.2 Cool, not enough [ Both PC & FC (compressor operates) ] 9. Schematic Diagram 9. Wiring Connection Diagram 0. Parts Exploded View and Replacement Parts List 0. Part Exploded View : Body 0.2 Part Exploded View : Door 0.3 Part Exploded View : Packing 0.4 Replacement Parts List : NR-B37MV2, NR-B4MV2. Detail Change Notice

3 NR-B37MV2 / NR-B4MV2. SAFETY CAUTIONS FOR REPAIRING When you repair the refrigerator, please kindly take care for the following cautions.. Warning Before repairing unit, unplug supply cord Before you repair the refrigerator, please unplug the supply cord. Use authentic parts when repairing When you replace the parts, please use authentic parts to replace defective parts. Caution during brazing When you use touch for brazing, please ensure ventilation. Otherwise, you will be poisoned by carbon monoxide. Pay attention to using refrigerant If refrigerant touches fire, the gas becomes poisonous gas. Pay attention to getting electricity shock When you check the voltage of terminal, please do not touch the electricity part terminal. When you replace the parts, please wait for 3 minutes at least for discharging capacitor. Check safety after repairing Check the screws, parts, lead wires to take in place. Check the repairing portion whether circumferential parts are damaged or not. Check insulation resistance between supply plug and earth. When install refrigerator, check condition of supply cord and plug. Wipe off the dust on plug. Cutting and seal the electric device carefully..2 Caution Watch the hot parts During operation and after operation, compressor and pipes are hot. Also, under these condition, heater are hot. Do not burn your fingers when you touch it. Pay attention to refrigerant Do not touch liquid refrigerant. Otherwise your hands may be burnt. Pay attention to edge of parts Otherwise, your fingers may be cut. Pay attention to fins of evaporator and condenser Otherwise, your fingers may be cut. Before transportatin, adjust the bolt Otherwise, the floor may be damaged. Do not touch the pipe after brazing Otherwise, your hands may be burnt

4 NR-B37MV2 / NR-B4MV2 2. SPECIFICATION AND COMPONENTS Destination Model Plug Power Source Thailand NR-B37MV2 / NR-B4MV2 C2P 220V AC 50Hz Specification Capacity External Width (mm) Dimensions Depth (mm) Height (mm) Net Weight (Kgs.) Temperature Control Defrosting Freezer Star Rating Exterior Finish (cabinet / door) Inner Liner Insulation 355L / 395L (FC :02, PC : 253 / 293) / / 72 Kgs. FC : Electronic control (PCB) PC : Baffle damper thermostat Full-automatic heater deater defrost with a timer Full-automatic heater (Forcibly evaporated into the air) PCM color / PCM color - (Polyester paint coating / Polyester paint steel) Vacuum fomed ABS resin Polyurethane foam (cabinet / door) Sealed Unit Compressor (Winding Resistance at 20 C Evaporator Condenser Refrigerant Type Charge Oil Charge ETI57C3DCH-C0ECS Fin tube type Wrapper type (concealed condenser) HFC - 34a 30 gm 30 gm 25ml 9 (Freol ~ 0) Electric Parts PC Heater Door Switch Fan Motor Fan Blade Lamp Bulb PTC Relay Defrost Timer Defrost Heater Motor Protector Running Capacitor Defrost Sensor (DFC) FC Sensor (FCC) Temperature Fuse Type Rating Type Rating Resistance wire vinyl covered heater 3.4W / 220, 3.22W/M, 542 ohms D3D V / 0.5A DC 4V /.54W Ø 90mm. prop fan (Box Type) E4 / 22, 240V / 5W PTH7M330MD2 TYPE PAS-B37MV2 / B4MV2 (Control Board) () Ambient Temp. over 34 C 7h ADD (2) Ambient Temp. 28 C ~ 33 C 7h ADD Electronic PCB Control (3) Ambient Temp. C ~ 27 C 7h ADD (4) Ambient Temp. cover 0 C 3h ADD (5) Power ON 4h ADD Radiant heater MM V / 83W MM3-20DCW 4µF - 400V PTC B = 389K ± 2% R = 3.899KΩ ± 3% 0 PTC B = 3850K ± 2% R = 8.9KΩ ±.8% V / 0A / 73 C - 4 -

5 NR-B37MV2 / NR-B4MV2 3. PERFORMANCE DATA 3. NR-B37MV2 Thermostat Dial Setting Mean Fresh Food Compartment Temperature t3 Mean Freezer Load Temperature Vegetable Crisper Temperature PC Door Shelf Upper Temperature Egg Tray Temperature PC Door Shelf Bottom Temperature Running Ratio (%) Power Consumption (kwh/day) ± ± ± ± ± ± ± ± ± ± ± 5 75 ± 5 60 ± NR-B4MV2 Thermostat Dial Setting Mean Fresh Food Compartment Temperature t3 Mean Freezer Load Temperature Vegetable Crisper Temperature PC Door Shelf Upper Temperature Egg Tray Temperature PC Door Shelf Bottom Temperature Running Ratio (%) Power Consumption (kwh/day) ± ± ± ± ± ± ± ± ± ± ± 5 75 ± 5 60 ±

6 NR-B37MV2 / NR-B4MV2 4. SELF PROTECTING FUNCTION 4. Protection for IC Does IC receive IPM protect signal? Normal operating. 2 IC orders to stop compressor for 0 min. 3 After 0 min., does PCB check if IPM protect signal is normal? IC continues to stop compressor until hour. IC indicates Self Diagnosing sign. 4 IC cancels to stop compressor. Normal operating? 5 After restarting, does Stop compressor occure 0 times within 2 min? IC continues to stop compressor until hour. IC indicates Self Diagnosing sign. 6 IC cancels to stop compressor. Normal operating? 7 After hour. 8 Does system protection cycle for 333 times? 9 IC order to stop compressor completely. SYSTEM PROTECT CONTROL CYCLE st time SYSTEM PROTECT CONTROL CYCLE 333rd time STOP COMPRESSOR OPERATE each 7min X 0 times COMPRESSOR hour STOP OPERATE each 7min X 0 times - 6 -

7 NR-B37MV2 / NR-B4MV2 4.2 Protection for compressor locked After starting 2 sec., does IC detect rpm < 5r/sec.? After starting from 2-0 sec., does PCB detect rpm over 20r/sec.? Normal operating. 2 IC orders to stop compressor for 0 min. 3 IC cancels to stop compressor after 0 min. 4 After restarting, does Stop compressor occure 0 times within 2 min.? IC continues to stop compressor until hour. IC indicates Self Diagnosing sign. 5 IC cancels to stop compressor. Normal operating? 6 After hour. 7 Does system protection cycle for 333 times? 8 IC order to stop compressor completely. SYSTEM PROTECT CONTROL CYCLE st time SYSTEM PROTECT CONTROL CYCLE 333rd time STOP COMPRESSOR OPERATE each 7min X 0 times COMPRESSOR hour STOP OPERATE each 7min X 0 times - 7 -

8 NR-B37MV2 / NR-B4MV2 4.3 Protection for power supply droping Does power supply voltage drop as condition > 0. sec. and < 60V AC? Normal operating. 2 IC orders to stop compressor for 0 min. 3 After 0 min., does PCB check power supply voltage if it is > 80V AC? IC continues to stop compressor until hour. IC indicates Self Diagnosing sign. 4 IC cancels to stop compressor. Normal operating? 5 After restarting, does Stop compressor occure 0 times within 2 min? IC continues to stop compressor until hour. IC indicates Self Diagnosing sign. 6 IC cancels to stop compressor. Normal operating? 7 After hour

9 NR-B37MV2 / NR-B4MV2 5. SELF DIAGSING FUNCTION How to use Self Diagnosing function. Opening PC door and FC door, Push Quick Freezing bottom more than 5 sec. 2. Blinking LED of Energy Saving and Quick Freezing during 3 sec. Energy Saving 3. After blinking at 3 sec., each LED show as below. Quick Freezing Symptom Details of symptom Energy Saving LED Quick Freezing LED Normal None None Abnormal of FCC thermistor Break/Short of FCC thermistor None Blinking Abnormal of DFC thermistor Break/Short of DFC thermistor None Turn on Abnormal of ATC thermistor Break/Short of ATC thermistor Blinking Turn on Abnormal of FC fan motor Abnormal of defrost heater in FC Break/Short of defrost heater Turn on None Abnormal of INV compressor Abnormal of PCB Break/Lock of FC fan motor Abnormal revolution of FC fan motor Operate protector of IPM lock Operate protector of voltage dropping Operate protector of over voltage Error of communication Error of EEPROM Turn on Turn on Blinking Turn on Blinking Blinking - 9 -

10 NR-B37MV2 / NR-B4MV2 6. TEMPERATURE CONTROL How to operate the QUICK FREEZING (Quick cool button) If you want the refrigerator to freeze quickly in order to preserve the food, press the Quick Freezing button (green light LED turns on). The system will operate immediately and will stop operating automatically (green light LED turns off) when it runs for 50 minutes. And the operation will return to normal mode. Remark If you want to stop the operation, press the Quick Freezing button (green light LED turns off). The system will return to normal mode. If the green light LED is flashing, it means that the defrosting system is now working. The quick freezing system will start the operation right after the defrosting operation is finished. Energy Saving button Quick Freezing button How to use the ENERGY-SAVING operation When food storage is small or during nighttime and people out of home (when door opening frequency is low), the ENERGY-SAVING operation saves electricity consumption by operating the compressor at a lower speed than the normal operation. How to save energy Press the ENERGY SAVING button. (green light turns on) Press the ENERGY SAVING button again to stop the operation. (green light turns off) About energy saving Deodorizing function reduces. Interior temperature gets slightly higher. Frequent opening of the doors raise the interior temperature. (Higher interior temperature automatically activates normal operation on a temporary basis.) When the ENERGY SAVING is activated during QUICK FREEZING, the ENERGY SAVING starts after completing the QUICK FREEZING The ENERGY SAVING operation stops when the power cord is reconnected or after recovering from a power failure

11 NR-B37MV2 / NR-B4MV2 7. REFRIGERATOR INSTRUCTION GUIDELINE. Do not open the refrigerator frequently or leave it open for a long time. This is to prevent water dripping inside the refrigerator which will cause the waste of coolness and consumpting of energy. 2. Do not refrigerate unnecessary items or hard-to-rot foodstuff such as pumpkin, shallot, garlic, potato as it will make the refrigerator to work over load and waste the storage space without necessity. 3. Adjust the temperature according to the actual operating condition for energy saving. 4. Do not refrigerate the bottles bigger than the door shelf or the tray as the door will not close completely, which will cause the leakage of coolness. 5. Frequently check the door opening seal, it must be closed to the refrigerator s body completely. Do not leave the seal dirty or damaged or deteriorated as the coolness will leak and will cause the consumption of the energy without necessity. 6. If you will not be at home for several days or there are nothing refrigerated in the refrigerator, the plug should be disconnected for energy saving. In this case, clean the refrigerator and leave it half-open to prevent bad odor. 7. Clean the drain tray located over the compressor at the back of the refirgerator every 3 months to prevent the odor generated from humidity. 8. Energy saving dryer pipes and heating pipes embedded around the refrigerator cabinet are helping to prevent Condensation on the outer surface of the cabinet without consuming energy. This will make the outer wall of the refrigerator get warm and that is not a malfunction. 9. Drinking water bottles, beverage bottles such as soft drinks and fruit juices should be sealed closely to prevent odor gets into the bottles. Before calling for servicing, please check as follows. The refrigerator does not operate. * Check to be sure that the plug and its socket are in good conditions. * Check that there is any problem on main fuse and electricity system in the house or not. The cooling does not function properly. * Check to be sure that the temperature control button is at the proper position. * Check that the refrigerator is overloaded with stuff of there is any hot foodstuff refrigerated in it or not. * Is the refrigerator located exposing directly to sunlight or heat source? * Is the refrigerator door closed completely? Is the refrigerator opened frequently? Vapor generated inside and outside the cabinet. * The Vapor will generated outside the cabinet when the humidity is high (e.g. during rainy season) or the air circulation is not good. * If the vapor generated inside the cabinet, check that the door is completely closed or not. Is the refrigerator frequently opened or left opened for a long time? Is there is any hot foodstuff refrigerated in it? The refrigerator generates noise. * Check if the refrigerator is located on a stable floor or is installed properly. * Check if there is any object in contact with the refrigerator. - -

12 NR-B37MV2 / NR-B4MV2 8. TROUBLESHOOTING GUIDE 8. Not cool at all [ Both PC & FC (compressor does not operate) ] Does room light turn on? Check power supply. Ex. Connect power cord in inlet Ex. Check ELCB Defect of over load relay. Check noise filter PCB. Ex. Does fuse blow? Check control PCB. Ex. Does fuse blow? Ex. Defect of IC (IC205), Diode (BD20), etc. 2 Pushing PC door switch and room light turns off, and after release PC door switch, does room light turn on? Defect of control PCB. Defect PC door switch. 3 To start self diagnosing function by opening PC door and FC door and pushing Quick Freezing SW for 5 seconds. 4 Does Energy Saving and Quick Freezing blink? Defect of control PCB. Communication error between IC & IC20 5 Does the Energy Saving turn on and Quick Freezing blinking? Defect of control PCB. Abnormal connecting of compressor. Compressor lock. Chock. Leakage. Droping voltage of power supply. Rising voltage of power supply. 6 Does the Energy Saving turn off and Quick Freezing blink? Break FC thermistor. Poor connection between FC thermistor and PCB. Break wire of compressor. Chock. Leakage

13 NR-B37MV2 / NR-B4MV2 8.2 Cool, not enough [ Both PC & FC (compressor operates) ] To confirm when compressor is operating. When FC door opens and FC door SW pushes, does cold air spout out from exhaust? Defect of FC fan motor. Poor connection between FC fan motor and IC on PCB. Defect of FC door SW. 2 When PC door opens and PC door SW pushes, does cold air spout out from exhaust? Defect of damper. Defect of PC door SW. 3 To start self diagnosing function by opening PC door and FC door and pushing Quick Freezing SW for 5 seconds. 4 4 Does Energy Saving and Quick Freezing turn on? Does Energy Saving turn off and Quick Freezing blinking? Defect of FC fan motor. Poor connection between FC fan motor and IC on PCB. Break of FCC thermistor. Poor connection between FCC thermistor and IC on PCB. Abnormal of spec of DFC thermistor. * Resistor of thermistor is bigger as like as KΩ at 0 C 5 Does Energy Saving turn off and Quick Freezing turn on? 6 Does thermal fuse blow out? Short of DFC thermistor. Poor connection between DFC thermistor and IC on PCB. Break of DFC thermistor. Poor connection between FFC thermistor and IC on PCB. 7 Does Energy Saving turn off and Quick Freezing turn off? 8 Does thermal fuse blow out? Break of DFC thermistor. Defect of PCB as like as defect of relay, etc. Termal fuse blows. Abnormal of spec of DFC thermistor. * When resistor of thermistor is bigger as like as KΩ at 0 C, there is some case to blow thermal fuse out due to becoming defrost time longer. Does Energy Saving and Quick Freezing blink? Defect of communication circuit and EEPROM circuit of control PCB. Plug out and after few seconds plug in again. 9 Does frost adhere to evaporator much? Defect of refrigant unit. Gap of door, etc

14 NR-B37MV2 / NR-B4MV2 9. SCHEMATIC DIAGRAM 9. Wiring Connection Diagram EART H BLU E 3 WHIT E 5 BLACK CON30 NF B OARD CON30 2 GR AY 3 BLACK 2P 220V ~ / 50Hz BROW N MOTOR PROTECTOR MOTO R V W U EART H BLACK 3 WHIT E 5 BLUE 7 BROW N WHIT E 3 BLAC K 5 GR AY CON20 CON30 3 BASE BOARD CON CON 2 BLACK 2 GR AY 4 * 6 * 8 * 0 PURPL E 2 BROW N 4 * 6 * 8 PINK 20 YELLOW 22 RE D 24 * 2 * 4 * 6 * 8 * 0 * 2 * 4 RE D YELLOW BLUE * 22 * 24 * 26 * 28 * 30 BLAC K * * * 3 * 5 * 7 * 9 * * 3 * 5 * 7 * 9 * 2 WHITE 23 * * * * * 9 ORANGE * 3 * 5 GREE N 7 BROWN 9 * 2 * 23 * 25 * 27 * 29 * 3 * 33 FCC DFC FAN MOTOR M PC DOOR SWITCH N, C 3 C 2 N, C 3 C 2 FC DOO R SWITCH 3 2 CON3 CON7 BLACK LIGHT BLUE PINK WHITE YELLOW GREEN RED BLACK WHITE BLACK ROOM LAMP 240V 5W YELLOW L DEFROST HEA TER (264.5 Ω ) TEMP FUSE (73 C ) (5.4 k Ω ) HEATER AS. PC YELLOW GREEN RED BLACK WHITE DOOR CONTRO L - 4 -

15 NR-B37MV2 / NR-B4MV2 0. PARTS EXPLODED VIEW AND REPLACEMENT PARTS LIST 0. Parts Exploded View : Body

16 NR-B37MV2 / NR-B4MV2 0.2 Parts Exploded View : Door

17 NR-B37MV2 / NR-B4MV2 0.3 Parts Exploded View : Packing - 7 -

18 NR-B37MV2 / NR-B4MV2 Important safety notice : Components identified by mark have special characteristics important for safety. When replacing any of these components, use only manufacturer s specified part. 0.4 Replacement Part List : NR-B37MV2, NR-B4MV2 Parts List Ref. No. Part name Part No. Model/Q ty NR-B NR-B 37MV2 4MV2 TOP HINGE COVER CNRAE TOP HINGE CNRAE LAMP CNRAG ROOM LAMP COVER CNRAH GLASS TRAY TOP AS. CNRBH GLASS TRAY AS. CNRBH CRISPER CNRAH MEAT TRAY CNRAH DOOR SWITCH CNRAG BOTTOM HINGE SHIM (.0) CNRAJ-4973 CENTER HINGE SHIM FP 3.0+ CNRAJ CENTER HINGE CNRAE KEY STOPPER CNRAE BOTTOM HINGE SHIM (2.0)+ CNRAJ BOTTOM HINGE CNRAE CAP PAN H.4TS (DE) CNR ADJUST BOLT CNR EVAPORATOR COIL SUPPORTER CNRAF BIMETAL THERMOSTAT AS. CNRBG EVAPORATOR COIL CNRAF TEMPERATOR FUSE AS. CNRBG RADIANT HEATER COVER CNRAG DEFROST HEATER AS. CNRAG COIL COVER INSULATION F CNRAF COIL COVER CNRAF PAS-B4MV2 CONTROL CNRBG FILTER PCB CNRBG COVER L BOARD - SL CNRAC HOLDER ICE TRAY CNRAH ICE CUBE TRAY AS. CNRBH ICE BOX CNRAH FC TOP CASE CNRAH SHELL HANGER CNRAC FC BOTTOM CASE CNRAH WATER PAN EVAP AS. CNRBF EARTH AS. COMP. 320 CNRBG SUPPLY CORD AS. (3P) CNRBG HEXAGON NUT 8 CNR38-870A SPRING WASHER 8 CNR A WASHER 8 CNR38-470A COMPRESSOR ETI57C3DCH CNR MOTOR PROTECTOR CNR PTC RELAY CNR PROTECTOR COVER CNRAG PROTECTOR COVER CLAMP CNR DRYER W CNR Ref. No. Part name Part No. Model/Q ty NR-B NR-B 37MV2 4MV2 46 RUBBER GROMMET CNR CLAMPER DRYER CNR REAR CROSSRAIL CNRAF COMPRESSOR SLEEVE CNRAJ HEXAGON 8 BOLT 40 CNR A FAN MOTOR FC CNRAG INSULATION DUCT PC CNRAH CNRAH PLATE DUCT PC CNRAH CNRAH ESCUTCHEON BIO CNRAJ PLATE DUCT PCB CNRAH FILTER DEODORIZER CNRAG FILTER BIO CNRAG CONTROL PANEL PC B INSULATION CNRAC BAFFLE DAMPER THERMO AS. CNRBG CONTROL PANEL PC F INSULATION CNRAC CONTROL PANEL CNRAH PC THERMOSTAT DIAL CNRAH PC GASKET DOOR CNRAD CNRAD EMBLEM CNRAD PC DOOR AS. (FOAM) CNRBD CNRBD BASE HANDLE AS. CNRBD HANDLE COVER CNRAD CONTROL DOOR ASS Y CNRBD BASE CONTROL DOOR CNRAD BUTTON CONTROL CNRAD PAS-CONTROL CNRBG PC DOOR LATCH CNRAE PC DOOR STOPPER CNRAD FC GASKET DOOR CNRAD FC DOOR AS. (FOAM) CNRBD FC DOOR LATCH CNRAD EGG SHELF CNRAD EGG TRAY 8 CNRAD EGG TRAY 0 CNRAD TURN RACK CNRAD BOTTLE SHELF CNRAD PAS CONTROL (INSIDE) CNRBG BASE CONTROL CNRAC LABEL BASE CONTROL CNRAC DIAL CONTROL CNRAC BASE CONTROL AS. CNRBC Packing List Ref. Part name No. CARTON BOX PAPER PROTECTOR FRONT BOTTOM TRAY AS. PLASTIC COVER TOP PAD L TOP PAD R INSTRUCTION BOOK Part No. CNRAK CNRAK CNRAK-390 CNRAK-3380 CNRBK-0050 CNRAJ CNRAK-3200 CNRAK-320 CNRAK-3390 Model/Q ty NR-B NR-B 37MV2 4MV2-8 -

19 NR-B37MV2 / NR-B4MV2 DETAIL CHANGE TICE REVISION ITEM. PAGE DETAIL REMARK JUL ADD CONTENT SHOW THE CONTENT DETAIL RE-ARRANGE THE SUBJECT & RUNNING MOVE TEMPERATURE CONTROL & NEW PAGE.TO 3-8 REFRIGERATOR INSTRUCTION GUIDELINES SUBJECT TO PAGE. 0 & 3 8 REVISE PART NAME,. OF WATER FOR UPDATE PAN EVAP AS. 4 8 REVISE PART NAME,. OF FOR CORRECT COMPRESSOR - 9 -