Service Manual for Showcase cooler PREMIUM MODEL PRF68DX PRF98DX PRF128DX PRF90DX PRF125DX
Content Table 1. Main feature and product appearance---------------------2 2. Unit Specification----------------------------------- 3 3. Safety during maintenance or service ------------- 3 4. Electrical Diagram ------------------------------- 4 5. Cooling System Diagram --------------------------- 5 6. Part Lists and explanation ---------------------------- 5 7. Disassembling and replacing of the components ---------6 8. Check the breakdowns of the cooling system --------------7 9.
1、Main feature： Model PRF68DX PRF98DX PRF128DX PRF90DX PRF125DX Door Integrated Glass Door with beautiful recessed handle Gasket seal for the door Recessed door gasket seal, easy to be discharged and cleaned.
2、 Unit Specification： No.
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: 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.
5、Cooling System Diagram: Capillary Dry Filter Condenser Evaporator Air Suction Pipe Compressor Note: Arrow direction means the flowing direction of the refrigerant. 6、Part Lists and explanation： 1、PRF68DX/ PRF98DX/ PRF128DX No.
5 Thermostat cover 1 1 1 1 1 6 Compressor base 1 1 1 1 1 7 Condensate Water Drain cap Fixing feet 1 1 1 1 1 4 4 4 4 4 8 7、Disassembling and replacing of the components: When replacing the components, must unplug the unit first, in order to be safety.
Problem and check point Cause Solution Compressor Leakage point ? Yes Check the frost No on the cabinet frost liner surface Leakage No check On the pipe joint Refrigerant Leaks Cut off the low pressure pipe and spurt out the residual refrigerant Repair the welding, clean the pipe and replace the dry filter Bad compression No air suction on Replace the the compressor Cut off the high of the compressor low pressure pipe pressure pipe compressor A little A little refrigerant air Repair the welding, re
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).
9、Table for quick answer for the field problem： Item Phenomenon Check point and the detail No power supply in neighbor house Power indicator is All of other Check that other not on and appliances in appliances are working compressor house don’t or not. doesn’t run work Only this freezer doesn’t work Caused by Field power supply is cut off. Main fuse is cut off.
Power supply voltage Cooling system Compressor run can Compressor (B)、 Compressor Incorrect using Measure the insulation resistance by meg-ohm meter, if the insulation resistance < 1 MΩ,the unit can’t be used for long time. The voltage is too low. (Maybe lower than 175V) There is no sound of refrigerant flowing in cooling system and it leaves oil on the welding point There is no sound of refrigerant flowing in cooling system and no oil on the welding point.
runs but cooling effect is not good. Leakage cooling air of The unit is not placed at good position (C)、 Temperature is too low Abnormal action of thermostat Thermostat is set at higher temperature Set it to lower (lower digit)? temperature There is too more food in cooling Too more food compartment, too crowded, ensure good air circulation inside freezer Hot temperature food let the temperature Is there high temperature food, like hot inside freezer soup etc., inside freezer? cooling compartment rise.
(F)、 Too noisy and vibration Check the electrical parts touch with the Electricity metal enclosure or not, and the grounding leakage lead is not grounded properly Check it have static electricity influence Static electricity influence There is sound Check the compressor has abnormal Compressor inside compressor sound or not.
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.
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.
