Service Manual - BrandsMart USA
Contents
1. No refrigerant frost eakage heck off the No ut low preesure pipe air spurt out lair spurt Refrigerant a SS Normal suction of the comressor low out pressure pipe Cut off the high pressure pipe No air suction on ithe compressor ow pressure pipe ut off the high of the compressor pressure pipe ittle No air on the Pipe clogged low pressure side Bad compression Replace the compressor Lm A little efrigerant air refrigerant air Repair the welding Leakage etected Leakage c ut off the spurt out x eakKS spurt out clean the pipe and checking 7 point 7 Low preesure pipe slowly replace the dry filter Condensate dew but no frost Big quantity refrigerant air No air suction or weak spurt out Cut off the high iIpressure pipe suction on the compressor _ Compressor Replace the dirty and clogged parts and clean the system pipe _ Vacuuming and recharging Replace the Leakage check again Check the high Tow pressure pipe breaks down lcompressor Normal suction of Not sufficient nitrogen Pipe is Replace the dirty and the comressor low air return back the low logeed soarie ad pressure pipe pressure side clogged geed p f slight2. Specification No Model PRF68DX PRF98DX PRF128DX PRF9ODX PRF125DX 1 Net Capacity L 168 238 338 239 339 2 Voltage V 115 115 115 115 115 3 Frequency Hz 60 60 60 60 60 4 Refrigerant R134a R134a R134a R134a R134a 5 Refrigerant Amount g 100g 125g 155g 135g 155g 3 Safety during maintenance or service In order to be safety during maintenance must obey the following basic attention 1 During service gt Pay attention to the flame or ignition nearby particually after welding using gas too must turn off the flame first then can do other maintenance work because the refrigerant will produce the toxic air when it touch with flame sparkle or capacitor Do not do the welding work in the airtight or bad air circulation room When discharging the refrigerant must keep the room good air circulation condition When cutting the suction pipe or discharging pipe of the compressor pay attention to the surplus refrigerant and internal pressure in cooling system pipe 2 Unplug the unit gt When you are ready to proceed the maintenance must first unplug the freezer first to ensure the safety 3 Avoid electrical shock gt Normal when proceeding the maintenance must open the power supply first But if you must check the field wiring or the component of the unit with power supply in must be very carefully and don t touch the live parts If you find out the wiring is aged please repl
3. There is heat source near the unit affect the heat dissipation C Check the sensor head of the thermostat Incorrect Temperature is loosing or not temperature istoolow Abnormal action sensing of of thermostat thermostat Thermostat is not at good quality Thermostat is breakdown D There is The relative Water condensed water The environment is too wet humidity is too condensate on the closure high E Confirm the insulation resistance is lower Insulation is not Electrical shock Leakage than 1 MQ by the meg ohm meter good sense on the EA of eee Check the electrical parts of the unit are Insulation is not electricity wet good Check the electrical parts touch with the metal enclosure or not and the grounding lead is not grounded properly Electricity leakage Check it have static electricity influence Static electricity the feet is adjusted at proper position or not influence There is sound Check the compressor has abnormal Compressor inside compressor sound or not abnormal Ph Check the pipe is touched each other or Pipe touching Too noisy not produce and There is vibration resonance vibration sound Check the installation ground is flat and The unit is not placed evenly 10 Note of the cooling system maintenance with R134a refrigerant 1 The requirement of the cooling system parts Because refrigerant R134a and its lubricating oil grease is of strong water a
4. cord assembly 1 8 Adjustable feet 4 9 Door gasket sealing strip 1 9 Running indicator 0 10 Power indicator 0
5. model 5 Cooling System Diagram Capillary Dry Filter Condenser Evaporator Air Suction Pipe n Compressor Note Arrow direction means the flowing direction of the refrigerant 6 Part Lists and explanation 1 PRF68DX PRF98DX PRF128DX PRF90DX PRF125DX T l No Parts Name PRF68DX PRF98DX PRF128DX PRF90DX PRF125DX 1 Door 1 1 1 1 1 2 Hinge 2 2 2 2 2 3 Shelf 4 4 4 4 4 Thermostat cover 1 1 1 1 1 Compressor base 1 1 1 1 1 Condensate Water Drain 1 1 i i i cap 8 Fixing feet 4 4 4 4 4 7 Disassembling and replacing of the components When replacing the components must unplug the unit first in order to be safety 1 Replace the thermostat Unscrew the fixing screw of the thermostat box remove the thermostat box then remove the old thermostat install the new thermostat with same model and reinstall back the whole thermostat box with same fixing screw 2 Replace the PTC starter and overload protector of the compressor Remove the clamp of the connecting terminal cover of the compressor and the terminal cover toward the vertical direction remove the broken down starter or overload protector install back the new starter or overload protector then fix back the terminal box cover and its clamp 3 Replace the door gasket seal Remove the old door gasket seal from the groove of the door linear th
6. Premium Service Manual for Showcase cooler PREMIUM MODEL PRF68DX PRF98DX PRF128DX PRF90DX PRF125DX 1 2 3 4 5 6 7 8 9 Content Table Main feature and product appearance 2 Unit Specification 3 Safety during maintenance or service 3 Electrical Diagram 4 Cooling System Diagram 5 Part Lists and explanation 5 Disassembling and replacing of the components 6 Check the breakdowns of the cooling system 7 Table for quick answer for the field problem 9 10 Note of the cooling system maintenance with R134a refrigerant 13 11 The performance testing requirement after service 14 12 Maintenance parts list 15 1 Main feature Model Door Gasket seal Hinge Accessory Structure for the door With top light i box evaporator R Pl PRF68DX Integrated Glass BCS eR ae m inside condenser gasket seal material BE e me easy to be simple Four shelves aaae PRF128DX beautiful EA ed a n and compressor and PRF90DX recessed handle aid aaa d racticall evaporator fan PRF125DX a y inside body to control the temperature well Product appearance PRF68DX PRF98DX PRF128DX PRF90DX PRF125DX 2 Unit
7. ace it in time 4 Correct use the components gt If the component is damaged and need to be replaced be sure to replace with the component with same model do not use other models or other brand components and not use the changed component 5 Correct use the service tools gt Ensure to use the appropriate service tool right Otherwise it will cause bad electrical contact or loose fixing and the incidence will happen 6 Wiring connection gt When re connecting the cut wire be sure to use soldering method or terminal connection and then wrap the connection point with insulation tape ensure the good connection 7 Insulation resistance measure gt After completing the service and assembly must use the multi meter to measure the insulation resistance if it is greater than 1 million ohm then you can plug on the unit 8 Grounding test gt After maintenance use the multimeter to measure the grounding resistance to ensure the grounding resistance is less than 0 1 ohm 9 Pay attention to the child or infant nearby gt When maintenance don t let the child or the infant nearby 10 Cleaning gt After service do the necessary cleaning work and tell the customer the necessary precaution 4 Electrical Diagram Light Switch Thernal Protector Condenser Compressor Please note maybe some units are without RUNNING CAPACITOR marked in red color in above diagram according to the used compressor
8. bsorbability and oxidation ability and will cause catalysis reactivity with chloride to produce impurity to be silt So during service process you should pay more attentions to the water quantity oxide quantity chloride quantity oil quantity and impurity quantity in the cooling system and control it more strictly Left water quantity control a If the cooling system parts like condenser evaporator compressor or the dry filter etc need to be replaced the replaced parts should be stored charging with dry nitrogen with pressure 0 2 0 3Mpa and if these parts have leakage of nitrogen they must be dried in the high temperature chamber and be taken out of the water before using b The molecular dry desiccant inside dry filter must be controlled strictly guaranteed that the left water quantity must be lower than 1 5WT And normally after the dry filter is opened from vacuum package must be welded to the pipe system within 5 minutes If at wet condition relative humidity gt 50 must take measure to be protected from humidity and the dry filter must be connected to the system pipe at once after removing from package so as to produce the sealing system 2 The requirement of the service equipment No need recycling equipment except charging machine if the equipment is special for R134a refrigerant system must mark it clearly to avoid use each other except welding machine pliers electronic balance 2 The vacuum machine and chargi
9. en install the new gasket seal into the four sides of the groove install it oven as possible open and close the door several times ensure that the door is sealed 4 Replace the compressor a First cut the welding point of the technical pipe of the compressor to discharge the refrigerant inside the cooling system then weld the old point to disconnect the pipe to the compressor remove the compressor to replace with a new one pay attention to replace with a new refrigerant dry filter b Install the new compressor weld the high pressure side and low pressure side pipe to the compressor check the system leakage after completing vacuum the cooling system charge the correct amount refrigerant into the system from low pressure side pipe After this run the unit to check the cooling performance is ok or not then weld and close the technical pipe 8 Check the breakdowns of the cooling system Following the next illustration to check the problem Problem and check point Cause Solution Compressor T Check the frost No on the cabinet liner surface frost Cooling Little Yes pipe joint eakage On the point Leaks Refrigerant ut off the low pressure pipe and spurt out the a residual refrigerant Repair the welding clean the pipe and replace the dry filter Leakage check again Vacuuming and recharging
10. erant omitting cut off the high pressure pipe means that compressor suction is normal charge the condenser pipe with pressurized nitrogen if no air at low pressure side means the pipe is blocked then replace the blocked parts and clean the system pipe If no air suction at compressor low pressure side cut off the high pressure pipe means air compression of the compressor is not good please replace the compressor 2 A little frost on the surface also do the leakage detecting first A If the leakage point is confirmed then cut off the low pressure pipe if a little refrigerant air spurt out means that the system leaks slowly on the leakage point you should repair the welding of cut pipe and the leakage point and clean the system pipe by the high pressure nitrogen replace the dry filter after completion these work re vacuum and recharge the refrigerant at last do the leakage detecting again B If big quantity refrigerant spurt out cut off the high pressure pipe to check the suction of the compressor low pressure pipe is normal or not if no suction or weak suction it means not good compression and need to replace the compressor if normal suction then charge the clean and warm nitrogen to the condenser pipe if you find the returned nitrogen of the low pressure side is not sufficient it means that the system pipe is clogged lightly please replace the clogged parts and clean the pipe 3 No frost but have condensate water on the
11. ly clean the system pipe Recharge appropriate quantity refrigerant L pressure side pipe and compressor discontinuously Pipe is clogged Compressor not working with ice SSS re eit ac Check the electrical parts such as PTC starter capacitor overload protector thermostat etc Good Too high temperature Check low Frost Too more Frost pressure pipe refrigerant Replace the dry filter and clean the system pipe with warm nitrogen Broken down Replace the broken down parts Measure the Abnormal resistance of the resistance Replace the accra compressor winding compressor Over large Normal Overload current Compressor protector acts goes wrong Replace the compressor Check the frost on the cabinet liner surface if find like following 1 No frost then do the leakage detecting A If the leakage point is found then first cut off the low pressure pipe to discharge the left refrigerant in the system then clean the pipe replace with a new dry filter and welding again again recharge the refrigerant and do the leakage detecting B If the leakage can not be found cut off the low pressure pipe if there is no refrigerant omitting then recharge the refrigerant and do the leakage detecting again If there is refrig
12. ng machine are special used for R134a refrigerant system 3 Service Procedure Special requirement during service process a Duration of from opening of compressor to vacuuming process must be less than 10 minutes and for other parts not more than 12 minutes b Vacuuming duration should not loess than 20 minutes c If refrigerant leakage happens it need to replace the compressor Before welding dry the cooling system by the nitrogen air d If the dust blockage happens in cooling system pipe if can be blow out by the nitrogen don t need to replace the compressor otherwise the cabinet is no useful and the evaporator is no useful e If ice blockage happens in the system pipe must replace the compressor f Change the dry filter only if the system is opened 4 Main point of service DThe replaced compressor must return back to the compressor manufacturer to be treated 2 The compressor can t be tested through direct absorbing atmosphere it will damage the compressor If the system pipe is opened for a long time or leakage happens you can dry the system by nitrogen during service 4 All of the welding material must be protected from wet condition And ensure to use a little as enough as possible Check the compressor is pressurized or not when opening When storing the R134a refrigerant must keep it sealed and not touch with atmosphere directly 11 The performance testing requirement after service After c
13. ompleting the service normally need to be done test running for 1 2days When proved to be safely and good cooling performance then move to the customer or user During test running we suggest that you can do following item 1 Insulation and safety Before plugging in use the DC 500 meg ohm meter to measure the insulation resistance between the live parts and dead metal enclosure ensure the result is not lower than 1 meg ohm 2 Starting capability The compressor can start smoothly and can start or stop normally If the unit can t start or stop normally must find the root cause and delete the cause then you can plugging it in to let it run 3 Cooling performance After running for 24 hours check that the frost on the surface of the cabinet linear is oven or not and there is no frost on the suction pipe 4 Electrical structure and safety After service check all of the electrical parts ensure the connection terminal of the electrical parts don t loose and the grounding wire is ok 5 Leakage checking After running for 24 hours check one by one of welding point by using halogen leakage detecting device or suds If leakage happens again then should service again 12 Maintenance parts list No Parts name PCS unit Note 1 Compressor 1 2 Thermal protector of 1 compressor 3 PTC starter 1 4 Feet of compressor 4 5 Refrigerant dry filter 1 6 Thermostat 1 7 Power
14. or can cooling system blocked run and no oil on the welding point No air is discharged out Go mipiessi on the discharging we j mouth of the areo rdawn Compressor compressor There is Compressor is abnormal sound inside compressor breakdown B Compressor Incorrect using Check the thickness of frost gt 5mm The frost is too thick runs but Thermostat is set at higher temperature Set it to lower cooling lower digit temperature effect is not There is too more food in cooling Too more food good compartment too crowded ensure good air circulation inside freezer Hot temperature food let the temperature Is there high temperature food like hot 1 aan inside freezer soup etc inside freezer cooling compartment rise It will affect the Too more times of opening of the door cooling effect Check the door gasket sealing strip is Broken of the broken or deformin door asket Leakage of 2 sealing strip cooling air Check the door is warded off by the food The door is not and the door is closed tightly or not closed tightly The freezer is inside direct sunshine The unit can not dissipate the heat because sunshine ae The back of the unit is too close to the Too close will The unit is not wall affect the heat placed at good eee Be dissipation position Over hot environment will
15. surface on the cabinet liner check the temperature of the high pressure side pipe and the compressor you will find it is too high temperature and check the low pressure pipe with frost if like this means too more refrigerant in the system please recharge with appropriate quantity refrigerant once more 4 The unit works discontinuously maybe the system is clogged with ice please replace the dry filter and clean the system with clean and warm nitrogen 5 Compressor doesn t run Please check the electrical parts such as PTC starter capacitor overload protector thermostat etc if you find the parts go wrong then replace a new one with same type and specification If all of these parts are good please measure the resistance of the compressor winding if the resistance is abnormal must replace the compressor otherwise check the overload protector act or not means the over large current and compressor goes wrong also replace the compressor 9 Table for quick answer for the field problem Item Phenomenon Check point and the detail Caused by No power supply Field power in neighbor supply is cut off house Power indicator is Chase dap fee All of other Main fuse is cut not on and appliances in off appliances are working compressor house don t or not doesn t run work Only this freezer Power supply doesn t work outlet has problem If the cooling thermostat is shorted of the earn Thermosta
16. t is circuit or turn the thermostat to the coldest breakdown point the compressor can run The knob is A There is sound when turning the knob of broken or is not Not cool the thermostat installed completely properly Check it is cutoff If it is cutoff Thermal protector may or not by the means it is be overloaded i multi meter broken down Compressor doesn t run but power indicator is on PTC Starter Check it is cutoff or not by the multi meter If it is means it is broken down open Check wiring the circuit Check it have broken point or not in the circuit wiring according the electrical diagram Maybe the lead is broken or the connection point is loosing Compressor problem Measure the winding resistance of the compressor The winding is broken or burnt Measure the insulation resistance by meg ohm meter if the insulation The winding is Power supply voltage i burnt resistance lt 1 MQ the unit can t be used for long time The voltage is Compressor too low can t start Maybe lower because of under than 175V voltage There is no sound of refrigerant flowing in Leakage of cooling system refrigerant and it leaves oil on the welding Cooling system point There is no sound of Inside leakage of refrigerant f cooling pipe or flowing in the pipe is Compress
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