Panasonic NR-B32SG1 Service Manual Download Page 72 | Manualshive

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11.1.2. Main PCB

Being used in electronic No-frost models. Provides control over
electrical components like compressor, heater, fan motor and
damper motor. Controls the defrost time automatically through
ambiance sensor.

11.1.3. Display

Being used in electronic No-frost models. Refrigerator & freezer
settings, menu & service mode and other settings are being
adjusted with display buttons. All settings can be seen via dis-
play screen.

Possible Main board/display defects:

• Socket connection fault
• Damage on Main board due to high voltage
• Relay contact fault on main board
• Display button fault
• Wavy display screen

11.1.4. Defrost Heater:

Being used to defrost the icing formations.

11.1.5. Thermal fuse:

Being used in all no-frost models and placed on the right side of
fin evap. Defrosting will be terminated by Defrost sensor. In
case of faulty Defrost sensor, thermal fuse will switch off the cir-
cuit at +76



C.

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Summary of Contents for NR-B32SG1

Page 1: ...tinental except France F France TABLE OF CONTENTS PAGE PAGE 1 Safety Precautions 2 2 Specifications 5 3 General Introduction 6 4 Technical Descriptions 8 5 Location of Controls and Components 12 6 Installation Instructions 14 7 Operating Instructions 16 8 Service Mode 20 9 Troubleshooting Guide 24 10 Disassembly and Assembly Instructions 27 11 Measurements and Adjustments 71 12 Dimensions 74 13 Sc...

Page 2: ...2 1 Safety Precautions ...

Page 3: ...3 ...

Page 4: ...4 ...

Page 5: ...t sensor PCC B value B 25 100 3560 K 1 0 Resistance at 25 C 2093 Ohm Freezer compartment sensor FCC Ambient temperature sensor ATC Defrost temperature sensor DFC Compressor Type hermetic Model HXK95AA Rotation speed 3000 rpm Overlord relay Model AE 18Fu x Operating temperature Return Temperature Operating current A Fan motor for Freezer compartment Model Rating BG2012 55310 08051 Dumper Model Rati...

Page 6: ...6 3 General Introduction 3 1 Flow of Refrigerant ...

Page 7: ...7 3 2 Flow of Air 3 2 1 Inside the Fridge 3 2 2 Flow of Air Through Air Ducts Front view ...

Page 8: ...Mode Super Freeze Mode Super Cool Mode or Eco Mode ends or is cancelled the unit returns to its previ ous settings If AT sensor 45 C 22 and 24 will not settable If user sets the temperature to 22 or 24 and AT increases above 45 C after this set value setting will be change to 20 automat icaly FREEZER SECTION ADJUSTED SET VALUES ON DISPLAY COMPRESSOR ON VALUES COMPRESSOR OFF VALUES ADJUSTED SET VAL...

Page 9: ...unit returns to its previ ous settings Fridge set values changes according to AT sensor a If AT Sensor 18 C Fan and compressor aren t working together b If 18 C AT Sensor 24 C Fan and compressor aren t working together FRIDGE SECTION ADJUSTED SET VALUES ON DISPLAY DAMPER ON VALUES DAMPER OFF VALUES ADJUSTED SET VALUES ON DISPLAY DAMPER ON VALUES DAMPER OFF VALUES 8 C 10 C 8 C 4 C 6 C 4 C 7 C 9 C 7...

Page 10: ...ren t working together e If AT Sensor 43 C Fan and compressor aren t working together FRIDGE SECTION ADJUSTED SET VALUES ON DISPLAY DAMPER ON VALUES DAMPER OFF VALUES ADJUSTED SET VALUES ON DISPLAY DAMPER ON VALUES DAMPER OFF VALUES 8 C 12 C 10 C 4 C 8 C 6 C 7 C 11 C 9 C 3 C 7 C 5 C 6 C 10 C 8 C 2 C 6 C 4 C 5 C 9 C 7 C FRIDGE SECTION ADJUSTED SET VALUES ON DISPLAY DAMPER ON VALUES DAMPER OFF VALUE...

Page 11: ...ressor Compressor will run 20 min continuously after defrost 4 3 Fan Control a If 24 C AT Sensor 32 C and freezer is set to 17 C or colder and cooler is set to 4 C or warmer Fan will work together with compressor except below condition If stopping time more than one hour and refrigerator temperature warmer than damper on set values fan will work untill refriger ator temperature reach damper off va...

Page 12: ...12 5 Location of Controls and Components 5 1 Display and Control Panel ...

Page 13: ...13 5 2 Components ...

Page 14: ...on for which the appliance is designed Refer to the Specifications Section for your appliance s climate classification Level Install on a level floor that s strong enough to support a fully loaded refrigerator You can adjust the level of the refrigerator by screwing or unscrew ing the two adjustable front legs as shown in Figure 2 This prevents vibration and noise If the appliance is to stand on a...

Page 15: ...ting indicator All buttons on the control panel are touch operated Only press to activate the button you want to operate Notes Cooling may take longer in the summer months or at other times when the room temperature is higher If you need to unplug the refrigerator wait at least 10 minutes before you plug it back in again If not you might damage the compressor Ambient room temperature You ll find y...

Page 16: ...n order to exert the maximum freezing capacity 1 Set Super Freeze Mode 10 hours before storing the food 2 If you wish to store a large amount of food remove the two top drawers from the freezer and place the food directly on the glass shelf or put it in the lowest drawer of the freezer A bigger freezing capacity can be exerted if placing the food directly on the top glass shelf The maximum freezin...

Page 17: ...d Eco Mode will be cancelled and the selected mode will become active Holiday Mode can be selected If it is selected Eco Mode will be cancelled and Holiday Mode will become active Features Set this mode when the fridge is not going to be used for a prolonged period such as during a long vacation In this mode the fridge temperature is automatically set to 12 C and the freezer temperature is automat...

Page 18: ... light 30 min One indicator represents five minutes 3 If no operation is performed for 1 second 3 sec for the first press during the setting pro cess the Bottle mode indicator will flash and a beep will be heard indicating that Bottle Mode is set 4 The top lit indicator blinks for five minutes Then it becomes unlit and the next highest indicator starts blinking This repeats until the last indicato...

Page 19: ...usted To show alarm function these will be used 1st pushing to Alarm Button Alarm SR lights 2nd pushing to Alarm Button Alarm LV lights 3rd pushing to Alarm Button Nothing lights 7 2 2 Canceling Demo mode For cancelling Same operation will be used If user will push Bottle left button at the same time demo function will be can celled When appliance is Demo mode if plug is removed or there is an ele...

Page 20: ...will blink during mode Defrosting mode will start and finish as it s explained in Defrost Control Mode can be canceled manually or automatically Manual canceling will be done by pushing right button Holiday symbol will be OFF if defrost is canceled manually Appli ance will return to initial service mode reaction If manual canceling of this function is not performed in 30 min service mode will be c...

Page 21: ... sensor temp 40 C 24 bar should be ON If 40 C sensor temp 30 C 22 bar should be ON If 30 C sensor temp 20 C 20 bar should be ON If 20 C sensor temp 10 C 18 bar should be ON If 10 C sensor temp 0 C 16 bar should be ON If 0 C sensor temp 10 C 2 bar should be ON If 10 C sensor temp 20 C 4 bar should be ON If 20 C sensor temp 30 C 5 bar should be ON If 30 C sensor temp 40 C 6 bar should be ON If senso...

Page 22: ...ort or 30 C Display 22 s bar ON Breakdown of 1 and 2 Display 16 and 18 bars ON Breakdown of 1 and 3 Display 16 and 20 bars ON Breakdown of 1 and 4 Display 16 and 22 bars ON Breakdown of 2 and 3 Display 18 and 20 bars ON Breakdown of 2 and 4 Display 18 and 22 bars ON Breakdown of 3 and 4 Display 20 and 22 bars ON Breakdown of 2 and 3 and 4 Display 18 20 and 22 bars ON Breakdown of 1 and 3 and 4 Dis...

Page 23: ...rst 2 hours after refrigerator door open close ERROR DETAILS USER MODE REACTION SERVICE MODE REACTION F sensor 10 C Freezer compartment is not cool enough SR icon blinks Buzzer sounds If user pushes ALARM button buzzer is closed But SR ALARM blinks until defect is disappears Display 6 bar ON R sensor 15 C and if Holiday mode is not active Refrigerator compartment is warm Display 8 bar ON R sensor ...

Page 24: ...24 9 Troubleshooting Guide ...

Page 25: ...25 ...

Page 26: ...26 ...

Page 27: ... 1 Replacement of Display 1 First stick a tape on the corner of display to prevent any scratches 2 Take out the display panel cover by using a sharp thin tipped tool 3 Try to stretch it from one side then remove it with your hand by pulling forward ...

Page 28: ...r and remove the display panel assy 5 Connect the sockets to the new display 6 Tidy up the cables before placing the display to prevent jamming 7 Place the display and press gently from upper and bottom corners to fit inside the display housing ...

Page 29: ...d Panel Group and Main PCB Note Remove Refrigerator Door beforehand 1 Remove the head panel right cover and left cover 2 Unscrew the screws fixing the head panel Use an appropriate screw driver head torx 3 Remove the head panel ...

Page 30: ...30 4 Disconnect all socket connections 5 Remove the main pcb box and take out the main PCB ...

Page 31: ...CB box and make the connections then mount them to the head panel Mount the head panel to the panel housing 10 3 Replacement of Refrigerator Multiflow cover 1 Remove refrigerator multiflow caps and unscrew the screws 2 Remove the multiflow cover and multiflow isolation ...

Page 32: ...Connect the new sensor place the sensor in cover and reattach the cover 10 5 Replacement of Freezer Multi flow Cover 1 Remove caps and unscrew the 4 screws shown at the picture 2 Then pull multiflow cover slightly from the bottom In case of icing between cover and evap do not pull the cover with full force slightly shake the cover to brake the icing then pull ...

Page 33: ...e damper motor cables from the hook 5 Remove the sealing material putty Note Keep sealing material for re sealing the connectors after replacement 6 Disconnect the dumper motor connector from housing and remove the multiflow cover Note Damper motor is assembled in the multiflow cover ...

Page 34: ...7 Attach the damper motor cables to the hook and make its connection 8 Reseal the connector with the sealing material putty 9 Then push multiflow cover slightly to fit its place 10 Screw and place the caps ...

Page 35: ...ection Connecter housing is fixed on the surface of inner liner Can Not change To avoid short circuit Not be jointed with one connecter That is the reason of above connection Parts of fan motor with connectors for both L N with lead wires black for fan motor ...

Page 36: ...36 How to replace fan motor Summary ...

Page 37: ...g Then pink and white connector can be seen in one housing Black leaded wires are connected with fan motor Discon nect the fan motor connectors Note To disconnect the connectors pull Them to the down to release the tabs on connectors 3 Cut the cable tie then cut both the black lead wires which comes from white and pink color connectors Faulty fan motor can en be removed Note Cut the cables from a ...

Page 38: ...propeller by pulling forward 6 Unscrew the fan motor box cover screws 7 Release the tabs by using a screwdriver 8 Replace the fan motor and fix the screws 9 Cut off the pink connector socket coming with the spare part ...

Page 39: ...or 12 Place the lead wire L to be connected and the spare LS lead wire in the grooves of part C Head of lead wire and of spare parts should protrude for approx 2 3 cm beyond U CONNECTOR This is to prevent the lead wire from coming off 13 Fold part B onto part C until hook at part B is fixed ...

Page 40: ...40 14 Fold part A onto part B Both left hook and right hook at part A should be fixed tightly by pressing with a pliers 15 After connecting the two lead wires cut the edge of lead wires using a cutter ...

Page 41: ...icon tape brown color 17 After connecting both cables with U CONNECTOR Con nect the pink and white connectors to the housing 18 Tie all the cables together with cable tie as shown below 19 Re seal the housing with sealing material putty ...

Page 42: ...eplacement Warning Before cutting the tube follow the Instruc tions of gas deflation gas re charging and welding given at appendix and make sure the gas is evacu ated 3 To take out the evaporator tubes need to be cut with oxy gen welding Note You need to protect the plastic cabinet from the fire of welding with a protector as shown in the below pictures Warning This process needs gas defla tion ga...

Page 43: ...placement 5 Place the new Evaporator Assy to its place when fixing the Evaporator Assy press it horizontally otherwise you might damage the fixing plastics 6 Weld the pipes with oxygen welding Note You need to protect the plastic cabinet from the fire of welding with a protector as shown in the below pictures 7 Seal the welding point with bitumen after they cooled down and tie with cable tie ...

Page 44: ...s told in Fan motor Replacement section before Note To disconnect the connectors pull them to the down to release the tabs on connectors Warning This process needs gas defla tion gas re charging and welding pro cesses so its need to be done by trained professionals Instructions of gas deflation gas re charg ing and welding processes will be given at appendix as a separate presentation Warning This...

Page 45: ...on gas re charging and welding given at appendix and make sure the gas is evacu ated 3 To take out the evaporator tubes need to be cut with oxy gen welding Note You need to protect the plastic cabinet from the fire of welding with a protector as shown in the below pictures 4 Remove the evaporator by pulling forward in a horizontal direction Do not push it up or down You may broke the fixing plasti...

Page 46: ...ment 5 Cut the cable ties around the evaporator and sensors 6 Remove the tape around defrost sensor and keep the tape for re sealing Remove the defrost sensor and ther mal fuse 7 Remove the black metal clippers with the help of a screw driver from both sides ofevaporator ...

Page 47: ...47 8 Detach the evaporator from the defrost heater 9 Place the new evaporator and re attach the clippers with the help of a pliers ...

Page 48: ... to the evaporator with cable tie 11 Re seal the defrost sensor and tie with the cable tie 12 Place the new Evaporator Assy to its place when fixing the Evaporator Assy press it horizontally otherwise you might damage the fixing plastics ...

Page 49: ... and make its connections with U CONNECTOR as told in Fan Motor replacement section 15 Re connect all the connections and re seal the housing with putty Tie the cables with cable tie and close the air flow cover as told in previous sections Warning This process needs gas defla tion gas re charging and welding pro cesses so its need to be done by trained professionals Instructions of gas deflation ...

Page 50: ...acement Warning Before cutting the tube follow the Instruc tions of gas deflation gas re charging and welding given at appendix and make sure the gas is evacu ated 3 To take out the evaporator tubes need to be cut with oxy gen welding Note You need to protect the plastic cabinet from the fire of welding with a protector as shown in the below pictures Warning This process needs gas defla tion gas r...

Page 51: ...up or down You may broke the fixing plastics Warning Operator should certainly wear gloves dur ing heater replacement 5 Cut the cable ties around the evaporator and sensors 6 Remove the tape around defrost sensor and keep the tape for re sealing Remove the defrost sensor and thermal fuse ...

Page 52: ... black metal clippers with the help of a screw driver from both sides of evaporator 8 Detach the evaporator from the defrost heater 9 Open the holders at the bottom of the evaporator tray to release the defrost heater ...

Page 53: ...53 10 Detach the tray from defrost heater and Attach the new defrost heater to the tray 11 Place the evaporator and re attach the clippers with the help of a pliers ...

Page 54: ...he cable tie 14 Place the new Evaporator Assy to its place when fixing the Evaporator Assy press it horizontally otherwise you might damage the fixing plastics 15 Weld the pipes with oxygen welding Note You need to protect the plastic cabinet from the fire of welding with a protector as shown in the below pictures ...

Page 55: ...e After welding process mount the fan motor box and make its connections with U CONNECTOR as told in Fan Motor replacement section 17 Re connect all the connections and re seal the housing with putty Tie the cables with cable tie and close the air flow cover as told in previous sections ...

Page 56: ...tion gas re charging and welding Before starting the process take the product in a spacious and good ventilated place 1 Brake the service tubes on compressor and dryer Warning This process needs to be done by trained professionals ...

Page 57: ... not perform any operations for min 30 minutes after you break the service tube 3 Cut the capillary tube from the bottom of dryer 4 Detach the dryer from the main tube using oxygen weld ing After replacement of Fin Evap Assy or Fin evap only or Defrost heater apply below instructions for recharging 5 Cut the end of capillary tube with the capillary scissor with an angle of 45 ...

Page 58: ...e the new dryer and weld the connection Note Dryer must be changed in every time before gas charging 7 Curl the capillary tube as in the below picture Weld the main tube and new service tube to dryer 8 Change the service pipe of compressor with new one ...

Page 59: ...ce tubes to check if there any blockage 10 Blank the service tube on dryer with welding and connect the gas charging machine via service tube on compressor for vac uuming Vacuuming should last at least 45 mins after vacuuming check the pressure levels for ensuring there is not any leakage ...

Page 60: ...of gas 12 After gas charge pinch off the service tube and blank with welding For R600a apply two pinch off 13 Check every welding point with a detector or foam against any leakage 14 After all process connect the product to a n energy moni tor and check if the consumption values are normal ...

Page 61: ...al fuse Note Be sure to replace both thermal fuse and defrost sensor in case that thermal fuse is blown 10 11 Replacement of Defrost Sensor 1 Cut the cable tie 2 Disconnect to defrost sensor connector 3 You can take out the defrost sensor by removing the alu minum tape on it 10 12 Replacement of Freezer Sensor 1 Remove the freezer sensor cover by pulling forward and disconnect sensor connector ...

Page 62: ...bient Sensor At the top of the cabinet 1 Remove the ambient sensor cover by pulling forward and disconnect sensor connector WARNING Do not remove the black rubber tube in any case which placed at the end of water evacuation pipe ...

Page 63: ...r Glass Shelf 1 Unscrew the screw fixing the foot 2 Remove the freezer glass shelf 10 15 Replacement of Door Switch 1 Insert a screwdriver into the gap and pull the door switch 2 Disconnect the connectors And remove the door switch ...

Page 64: ... tion Warning Make sure the unit is unplugged 1 Unscrew the screw fixing the Top Hinge Cover and remove it 2 Disconnect the Display Connector 3 Unscrew the screws fixing the Top Hinge and remove it Note The grounding wire is only for protecting the prod uct especially for display against static electric forming at production line There is no function at daily use ...

Page 65: ... fixing the Middle Hinge and remove the Washer 6 Remove the Freezer Door 7 Lie down the appliance to the back min 300mm CAUTION Do not damage the outer condenser 8 Unscrew the Stationary Foot under the Bottom Hinge 9 Unscrew the Bottom Hinge fixing screws and remove it ...

Page 66: ... screw hole has blocked with the expanded polyurethane 13 Screw the Stationary Foot for the right side 14 Insert the Flat screwdriver into the gap between the Spacer and the Bottom Hinge Then pry off the Spacer Unscrew the pin of hinge rotate the Bottom Hinge 180 15 Screw the pin to the same hole from different direction Paste the Spacer to the opposite side of the Bottom Hinge ...

Page 67: ...e Hinge Screw Caps on the left side 19 Then insert that Door Handle Screw Cap and Middle Hinge Screw Caps on the right side 20 Put up the appliance 21 Detach a right Bushing and insert it in the left hole 22 Remove a left Bushing Cap and insert it in the left hole 23 Turn the Freezer Door upside down 24 Remove the Catcher Right of Freezer Door ...

Page 68: ...rew hole is not open Please drill it by an electric drill as shown in figure The drill diameter should be 2 5mm 26 Assemble the freezer door 27 Turn the Middle Hinge upside down and screw it and Washer to the left side 28 Remove the Catcher Right of Refrigerator Door 29 Install left Bushing CAP in the right hole ...

Page 69: ...Freezer Door s Catcher Left 31 Remove the Bushing Cover and pull the Cable to outside The Bushing Cover is used on the right side 32 Roll and insert the lead wire Cut the grounding wire as shown in figure and insert the bushing cover to the left side 33 Unscrew the Hinge Pin and rotate the pin upside down then fix it to right side of the Top Hinge 34 Swap the Head Panel Covers ...

Page 70: ...35 Assemble the Refrigerator Door 36 Remove the Socket Cover and attach it on the right side 37 Screw the Top Hinge fixing screws 38 Connect the Display Connector 39 Mount the Top Hinge Cover and screw it ...

Page 71: ...hich turns into vertical motion at cylinders to create exhaust compression Possible compressor defects Short circuit bobbin fault Compressor locking Low compression pressure Check the relay connections If the relay connections are open circuit they must have exchanged Normally relay resistance should be between 10 and 30 You should disconnect capacifor before measurement Check the compressor windi...

Page 72: ...being adjusted with display buttons All settings can be seen via dis play screen Possible Main board display defects Socket connection fault Damage on Main board due to high voltage Relay contact fault on main board Display button fault Wavy display screen 11 1 4 Defrost Heater Being used to defrost the icing formations 11 1 5 Thermal fuse Being used in all no frost models and placed on the right ...

Page 73: ...cover assy To take out damper motor 11 1 7 Sensor Sensors used at electronic models shows different resistance values for various ambiance temperatures These resistance values are indicated below 11 1 8 Thermal Fuse Control Thermal fuse must be checked and if it is open circuit needs to be replaced Notice Defrost sensor and thermal fuse must be measured with ohm meter 11 1 9 Defrost heater Durabil...

Page 74: ...74 12 Dimensions ...

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