DWC282 283 Svc manu..
Contents
1. Remove the two transformer fixing screws and Replace the transformer C see fig 22 To replacing the display board Pull the four 4 display cover fasteners on display board cover E as per arrowhead direction and then remove the display board D and its two connectors from both sides Replace the display board See Fig 22 17 18 2 gt To disassemble new structure electrical box See Page 6 a Remove all the shelves and the upper cover of the air duct board to expose the whole control panel See Fig 7 b Unplug all the connecters then press the head of each of the four plastic screws 6 one by one then remove the control board C and replace the control board see Fig 23 Remove the two transformer fixing screws and replace the transformer D see fig 23 d To replacing the display board Pull the four 4 fasteners of display board cover F as per arrowhead direction and then remove the display board E and its two connectors from both sides Replace the display board See Fig 23 o 18 182. fixing screws 1 2 3 4 See Fig 2 The right hand diagram is for reasons of clarity only b Pull out electric box to expose the control panel as per the direction of arrowhead then unplug all the connectors from the control panel and remove electric box A See Fig 3 Fig 4 Shows the new version of the control panel 5 18 NS AAA New version control panel connections To the fan of the refrigeration compartment F3 White To the air cycling fan F2 Yellow To the fan of the freezing compartment F1 red To the sensor of the freezing compartment X1 yellow To the sensor of the refrigeration compartment X10 White To the sensor of the evaporator X11 Red To the power supply L N To the grounding or earth To the PTC heater X9 White 10 To the compressor X3 White sO ON SY oe DM 6 18 c Remove screws 6 7 8 9 10 11 then remove the lower cover of middle air duct board Fig 5 d Remove screws 12 13 14 15 16 17 then remove the upper cover of the middle air duct board G to expose the air duct board See Fig 6 LLG Ht Jo LM 2 To disassemble the new version a Remove the shelves then remove the fixing screws 2 3 The right hand diagram shows the box for clarity only See Fig 7 7 18 N N SO Ss HUT Y aN WS N 2 N gt i ooon b Remove the upper cover of middle air duct board A then unplug a
3. for an empty unit assuming ambient temp of over 0 degrees centigrade and continuous operation and normal temperature of the freezing compartment check the heater fan and PTC heater If both are working normally there is probably a heating system fault O How to repair the fault 1 How to check the heater fan If the temperature of refrigeration compartment is lower than set temperature but heater fan does not function after verifying no bad connections replace the fan unit Fig 13 2 How to check the PTC heater Check the resistance at both sides of PTC heater using a Multi meter the reading should be approx 1 5 K 2 assuming normal temperature if open circuits Replace the PTC heater having once verified the connections to the PTC heater See Fig 11 3 If no fault in the fan or PTC heater replace the control panel see Page 16 A High noise of wine cellar O compressor noise 1 The working of motor and piston motion will cause noise when compressor working So if noise is steady and not exceeds 42 dB it s normal If noise is not steady or very high it s compressor fault and it should be maintained or replaced 2 If compressor s shock absorption rubber is hardening or damaged or fixing screw of compressor is too tight or loose it will cause noise The settlement is to change new shock absorption rubber or adjust fixing screws O fan noise 1 Normal fan motor and airflow should not exceed 32 dB 2 If there is noise abo
4. only run the compressor for a few minuets and recheck the current and if there is pressure at the outlet pipe If the current reading is still out of range specified above and no pressure from the compressor outlet replace the whole compressor 2 to check the cooling system pipe work Carefully check the cooling system after verifying the compressor is working normally Then follow the procedure below 2 1 gt Check for leaks Then cut off process pipe and check the refrigerant If there is not enough refrigerant this indicates a small leak isolate the leak and repair it see below recharge the system with the correct amount of refrigerant 0 8 1Mpa of nitrogen 2 2 gt a Cut off discharge pipe from compressor and charge with refrigerant to 0 8 1Mpa nitrogen via the process pipe Then place your hand close to the broken end of discharge pipe if you can feel a little airflow this proves the capillary is normal if not it means the capillary is jammed b Weld the broken discharge pipe if capillary works normal then charge to 0 8 1Mpa nitrogen via the process pipe and check if there are any leaks from every soldered joint of the cooling system using soapy water and looking for tiny bubbles Check the soldered joints around the compressor first Fig 12 then check the soldered joints around the evaporator see Fig 11 Remove the air duct board when you check the evaporator joints see Page 3 c Ifthere are no leaks The faults are A lea
5. 12 Olljamn ise nei chalet els A ee Page 12 A Evaporator freezing problems oo 0 0 0 cece cece ec eec eee e eee ee ee eeeeeeee ea eeneseeeen ees Page 12 A Unstable internal Temperature nae cece eecececeecececeeeec sence eceeteeeeeeeneeeen es Page 13 Control system problems Fault finding by the self check mode _ ussesssessessesennenesnerse nen Page 13 Sensor fault AA A een ehe Page 13 How to replace the sensor 22e22essessnessnesnnrneenenesnnnnnennnsnesne nenn Page 14 T LED display fault 2 een a it Page 16 How to remove parts inside of electrical box oo eee e cence nn Page 16 3 18 A Cooling system faults O How to diagnose faults It should take approximate 3 hours to reach the lowest setting temperature of 5 C for an empty unit assuming ambient temp of 32 degrees centigrade and continuous operation If not check the compressor cooling fans controller and sensors If all these are working normally there is probably a cooling pipe fault O Check points 1 Compressor Warning this check requires the power to be on take extra care and consult a qualified electrician Turn on the unit and check there is electricity current flowing to the compressor using a caliper type Amp meter the current should be within 0 6 to 2 Amps If the readings are not in this range turn off and cut off the pipes G and E see Fig 12 from the compressor then turn the unit on again in this case
6. 2 18 Service Manual For electronic dual temperature zone wine cellar Includes DWC282 283 This is a service guideline for possible failure and repair Warning before attempting any cleaning or maintenance this unit MUST be disconnected from the supply to prevent electrical shock A Preparation before maintenance O Equipment 1 Small bench Vise 2 Set of Phillips head screwdrivers 3 Seal pliers 4 Electrical Multi meter 5 Amp meter 5A caliper cable type 6 Electrical soldering iron 7 Wire strippers 8 Scissors 9 Vacuum pump 10 Soldering iron for copper pipes A Cooling system fault O Howto Evaluate the fault 0 cece cece cece ee eens ee ceca eee eneeeneeaenenees Page 3 O How to repair the fault ui aa Page 3 O How to remove the air duct board cece cece cece cece eee ee cece eases sees eeeen ens Page 3 O Diagram showing the front side soldered joints oo eee cece eee eeeeeeeeeeee tees Page 8 O Diagram showing the rear side soldered joints ooooooocnoncncncnononononinononos page 8 A Heating system fault O How to Evaluate the fault ccc cece ccc ce nce c cence eee eeee eases seen en eenenens Page 9 How torepairthe fault nassen state Ruh Page 9 A Noise problems CO Compressor NOISE karriere nn nie Page 9 O Faros sito Page 9 Reffigerant jet noise iria io Page 12 O Capillary vibration noise oo eee ec ccc cece asec cence ce ceee ec ee en eee eaeeeneeeen sees Page
7. d the various components of the unit do not respond as above check the faulty part and relevant connection If this does not cure the fault replace the control board see Page 3 4 gt To return the control panel to its normal working mode UN plug the unit and plug it in again 14 18 5 gt Only the new version control panel has a self check mode Sensor fault 1 gt The LED temperature display should the actual ambient temperature shortly after the unit is plugged in if not check if the connections are good in the electrical box see Page 4 check if the sensor plug is connected properly if the connections are good and the fault persists replace the sensor 2 gt If the LED displays E1 indicates a freezing compartment sensor open circuit fault and the sensor should be replaced see Page 14 If the LED displays E2 indicates a freezing compartment sensor short circuit fault and the sensor should be replaced see Page 14 4 gt If the LED displays E3 indicates an evaporator sensor open circuit fault and the sensor should be replaced see Page 14 If the LED displays E4 indicates an evaporator sensor short circuit fault and the sensor should be replaced see Page 14 6 gt If the LED displays E7 indicates a refrigeration compartment sensor open circuit fault and the sensor should be replaced see Page 15 7 gt If the LED displays E8 indicates a refrigeration compartment sensor short circuit fault and t
8. he sensor should be replaced see Page 15 8 gt For some older models with old version control panels If the LED displays 37 C 99F or infinity replaces the sensor See Page 14 How to replace sensors 1 gt Evaporator sensor The evaporator sensor is plugged into the fin of evaporator Remove the air duct board to access the sensor plug A and unplug in the direction of the arrowhead See Fig 18 then unplug the other end of sensor from the X11 socket of the control panel and replace it See Fig 4 gt A m D f Nn gt Y Be ES Ya gt FEIN Y gt BEE A AA Ya D J A L Q gt Y 3 V V 5 Fig 18 2 gt Freezing compartment sensor The freezing compartment sensor is located on the evaporator fan See A of Fig 19 If it faulty please refer to section lt How to remove the Air cycling fan and evaporator fan gt See Page 10 15 18 Fig 19 3 gt Refrigeration compartment sensor Refrigeration compartment sensor is located on B of Fig 19 It has two different installations with 2 different replacements See Fig 20 amp Fig 20 1 For new replacement Remove the 2 fixing screws 1 then remove sensor cover 2 pull out the sensor 4 from the sensor cover and unplug the housing 3 then replace the sensor See Fig 20 For old replacement Remove the air duct board see Page 3 then remove the fixing
9. k in the condenser or anti dew pipe Or a fault of one of the other components in the unit These internal leaks cannot be repaired 2 3 gt Ifthere are no leaks in the cooling system pipe work 3 Refill the refrigerant 1 gt Using the vacuum pump form a vacuum in the system via the joint of the low pressure pipe the high pressure pipeline is on the process pipe of the drain filter Apply the vacuum pump for approximately 20 minutes Until the vacuum is lower than 100Pa Then solder the drainpipe Keep the vacuum running while soldering this joint 2 gt Fill Cooling system with refrigerant via the process pipe The refrigerant is R134a Regarding refrigerant quantity Please refer to the instruction at back label of wine cellar Then solder the compressor process pipe after the system is charged with refrigerant 4 Running test Replace all the components after the procedures above and turn the unit on To verify the effectiveness of the repair monitor the unit the compressor should automatically stop within or 2 5 deg centigrade of the set temperature within approx 3 hours assuming an ambient temperature of 32 Cand the unit is empty O How to remove the air duct board 1 gt Remove the shelves some models have Phillips head screws to hold other models have no screws Fig 1 4 18 gt AN 2 gt Remove the electric box There are two For old version see below To disassemble the old version a Remove box
10. ll connectors from the control panel Fig 8 The connections of the control board are as per Fig 4 Fig 8 c Remove the fixing screws 7 8 9 10 11 12 then pull out electric box C to expose the air duct board Fig 9 e VA d a N 17 47 AT In 47 A PTVL VT be VT W PO N N N a UNIONCOUOO00000000000 gt Am Y TEO 8 18 3 gt Remove the fixing screws of air duct board 1 2 3 4 5 6 then pull out air duct board A See Fig 10 YO II YA 8 T T Y QU VA y AN 4 gt For a View of the internal configuration after removal of the air duct board see Fig 11 O Front side joints location See Fig 11 A Capillary soldered joints B evaporator soldered joints UU VU UVUUOUUU WY SS SS SO Ss S re Fig 11 O See Fig 12 for arear side view ofthe joints position B Dry filter process pipe soldered joint C Dry filter soldered joint D Capillary soldered joint E Process pipe soldered joint F Suction pipe soldered joint G Discharge pipe soldered joint H Condenser process pipe soldered joint I Anti Dew pipe soldered joint 9 18 Fig 12 A Heating system faults O How to diagnose faults If the temperature of refrigeration compartment is 2 C lower than setting temperature
11. repair them or if the fan is damaged replace the whole fan unit See Fig 15 1 amp Fig 16 A Control system fault O Difference between old and new version control panel JG32C wine cellar has two versions of control panel See Fig 4 The difference between the two is New version has the evaporator sensor socket X11 and the refrigeration compartment sensor socket X10 is in a different position as is the freezing compartment sensor socket X1 Ensure the replacement control panel is correct before replacing it if it faulty please refer to section lt To disassemble old style electrical box gt See Page 4 O Fault finding by self check mode This series wine cellar has a computerized controller with built in self check function Start the self check mode as follows 1 gt Press and hold Set lower and Set upper button with power on 2 beeps will sound and then the controller will start the self check function 2 gt If everything is operating correctly a No response when pressing buttons b LED only display 20 C if ambient temperature is over 20 C and display actual temperature if ambient temperature is lower than 20 C c The compressor works and the RUN indicator light are on all the time If the cooler has condenser and evaporator fans they should work at full speed Heater and air cycling fans should work for 30 seconds alternately e The switch controls the light functions normally 3 gt If the control panel an
12. screw 1 then unplug the other end of sensor from socket X1 from the control panel and replace the sensor See Fig 20 1 4 gt There is a quick replacement solution for refrigeration compartment sensor See Fig 21 a Remove the sensor fixing screw and pull out the sensor cut off the wire at the end of the sensor A b Split the ends of the wires about 50mm and strips the ends about 12mm B c Prepare 2 heat shrink sleeves Spec 2 5mm 25mm and one new sensor Spec as per shown in diagram See C D d Take the new senor and split wire end through heat shrink sleeves then connect the wire with new sensor twist the wires together slip the heat shrink sleeves over this 2 joints and secure the connection by heating the sleeves with a lighter See E of Fig 21 16 18 Spare part Sensor asp O LED display error Replace the electrical display board fault see Fig 22 amp Fig 23 How to disassemble the electrical box There are two versions of electrical box old and new 1 gt To disassemble old structure electrical box See Page 4 a Remove the shelves and fixing screws 1 2 3 4 from the electrical box then remove the box to expose the whole control board See Fig 2 amp Fig 3 Unplug all the connecters then press the head of each of the four plastic screws 5 one by one then remove the control board B and replace the control board see Fig 22
13. th anti vibration compound Fig 11 O Oil jammed noise Fault intermittent and deep jet noise coming from inside of the capillary Caused by Compressor oil flowing into the cooling system pipe work probably due to the capillary slightly out of alignment during transportation Clean the cooling system pipe and recharge with refrigerant see page 3 A Evaporator freezing O This is normally due to A Poor seal between door and doorframe B The door not closed correctly for a long period of time This allows moist air into the cabinet which freezes in the evaporator if the ice is allowed to get too thick it may damage the fan 1229 1 gt Ensure the door is sealed against the frame If there is slight distortion of the seal heat the effected area gently with a hair dryer gently see Fig 17 with smooth strokes of the hair dryer then when still warm pull the effected area back into its original position this process may have to be repeated until the seal is completely back to its original condition If this fails replace the seal 2 gt If the ice has damage the fan it will need to be replaced See Fig 15 1 amp Fig 16 A Unstable temperatures inside the cabinet Unstable temperatures inside the cabinet is mostly due to a fault in the evaporator fan you can check this by When compressor works the RUN indicator light should come on and the fan should spin If fan does not spin check the fans electrical connections are faulty and
14. ve 32BD or the noise levels fluctuate the fan shaft is either damaged or worn 3 How to replace the fans 1 gt Heater fan a Remove the shelves See Fig 1 b Remove the electric box See Page 4 c Remove the air duct board See Fig 10 10 18 d Remove screws 1 2 3 4 then replace the heater fan See Fig 13 Fig 13 2 gt Air cycling fan and evaporator fan If the unit has an new style electrical box a Remove the shelves and screws 1 2 then pull out the upper cover of the middle air duct board A See Fig 14 b Then remove the foam B Caution Do not damage the foam See Fig 14 SNS SOS c Remove the fixing screw 3 then remove the sensor C See Fig 15 11 18 d Remove the fixing screws 1 2 3 4 then remove the air cycling fan A See Fig 15 1 Remove the fixing screws 5 6 7 8 then remove the condenser fan B See Fig 15 1 and replace them separately 3 SA gg0000000 000000000000 m O B A o 53 E32 Fig 15 1 If the unit has an old style electrical box a Remove the lower cover of middle air duct board See Fig 5 then remove the foam A See Fig 16 b Remove screw 9 then remove the sensor D See Fig 16 Remove screws 1 2 3 4 then remove air cycling fan C See Fig 16 Remove screws 5 6 7 8 then remo
15. ve evaporator fan B Fig 16 Then replace them separately 12 18 O Refrigerant jet noise If here is continuous noise like a water spray from the capillary the end of the capillary is in the wrong position or there are rough edges on the end of the capillary 1 gt Heat the soldered joint of the capillary A of Fig 11 then remove the capillary from the evaporator and smooth the end with an eraser Caution do not allow any particles into capillary unit 2 gt Replace the capillary into the evaporator then solder it back into the correct position not exceeding 15mm in the evaporator and pack the joint with anti vibration compound 3 gt Recharge with refrigerant See Page3 O Capillary vibration noise Fault high frequency impact noise in capillary Zone Caused by either 1 gt The capillary being insert too deep into the evaporator so when the refrigerant is Jetting the end of vibrating capillary will hit the inside of the evaporator 2 gt Vibration from the capillary touching the inside of the cabinet or air duct board then when refrigerant is jetting How to repair this problem 1 gt De solder the capillary and re solder in the correct position avoiding contact with the inside of the evaporator The depth should be within 15mm then recharge the unit with refrigerant See page 3 2 gt If the capillary touches the inside of the cabinet or air duct board you should Adjust position of capillary and pack it wi
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