Compact Refrigerator Service Manual Models: PRF1650MW,PRF1660MS Features ● ● ● ● ● Energy efficiency Micro foam technology Low noise operation Thick insulation for energy efficiency Latest No.
CONTENT CONTENT 1. Content……………………………………………………. 1 2. Product 2 3. Specifications……………………….……..……………………. 3 4. Safety precautions……………………………………….……... 4 5. Function Schedule……………………………......…….………. 7 6. System 8 7. Circuit Diagram………………………………..….….….…… code illumination and Flow Chart……………..………………………...…… 8. Maintenance Service 9. 10. Series Introduction… and Trouble Shooting…….…... Exploded View…………………………………...………… List of Parts………………..………………………….
Specifications Specifications Models PRF1650MW-PRF1660MS capacity (L) 44 White/Silver Color Power Supply (V/Hz) 115V/60Hz Rated Input Power (W) 75 Power Consumption (kW·h/Y) 207 Net Weight (kg) 15.7 Gross Weight (kg) 17.
Safety precautions Safety precautions 4
Safety precautions 5
Safety precautions 6
Function Function Schedule ● Energy efficiency ● Micro foam technology ● Low noise operation ● Thick insulation for energy efficiency 7 Schedule
System Flow Chart System Flow Chart 1 Schematic diagram of System Flow Chart 2 Brief Description of System Flow Chart The refrigerant flows in the sequence: 1->2->3->4->5>1 8
Circuit Diagram Circuit Diagram 1 Schematic Circuit Diagram 9
Maintenance Service and Trouble Shooting Maintenance Service and Trouble Shooting 1. No cooling No cooling If compressor can run after it stop to run five minutes and give power. Check and repair according to the section of "the compessor doesn't work". NO YES If compressor can run naturally and temperature raising of condenser is very low Refrigerant leak,check and repair charge refrigerant again. NO YES ! Block by ice or dirty things,change filter and change refrigerant again.
Maintenance Service and Trouble Shooting 2 The compressor doesn't stop Compressor doesn't stop Does the refrigerator refrgerate? NO Check and repair according to the section of "No cooling". YES Is cooling capacity insufficient. NO Check and repair according to the section of "Cooling capacity is insuffcient". YES 1 The thermostat was set at the coldest position. 2 The ambient temperature is very high or the refrigerator is near by heat resource.
Maintenance Service and Trouble Shooting 3 Cooling capacity is insufficient Cooling capacity is insufficient Is the ambient YES temperature low than 16°C Check the therostat is correct? YES NO Does the refrigerant leak siowly?. Adjust and instruct consumer how to use.
Maintenance Service and Trouble Shooting 4 The compressor doesn't work The compressor doesn't work. Does the refrigerated room lamp illuminate when the door is opened? NO YES Is the ambient temperature low than Check the power source and power cord? NO Repair YES YES Check the therostat is correct? 16 Adjust and instruct consumer how to use. Does the control panel has 220V power output? NO Check and repair the control panel.
Maintenance Service and Trouble Shooting 5 Normal Phenomena—Not Troubles for Refrigerators In a domestic refrigerator, there is not only a complicated electric control system, but also a refrigerating system that is difficult to discern whether it is in a good working condition. Both the systems are related and affect each other. If a certain part of a refrigerator works abnormally .
Maintenance Service and Trouble Shooting 6 Common Troubles in Refrigerators and Their Remedies Causes for troubles occurring in refrigerators are closely related to the quality of components and workmanship in assembling by manufacturers as whether refrigerators are properly used and maintained .
Maintenance Service and Trouble Shooting Hums from a fully enclosed aggregate unit is the sound caused by overload indicating that the motor cannot be started normally ,meanwhile ,a clattering sound can be heard from inside the start relay ,which is produced because the start contacts cannot be released normally .
Maintenance Service and Trouble Shooting ambient temperature ,this means that most meshes of its screen has been clogged ,resulting in an obstructed flowing of refrigerant ,thus causing a drop in temperature due to throttling . d) Feel the temperature of exhaust gas from the refrigerating system .the exhaust gas should be very hot and this is the normal working state .
Maintenance Service and Trouble Shooting There are so many joints and sealed surfaces in a refrigerator ,accordingly ,quite a lot potential leak points do exist in the system .In troubleshooting ,pay attention to those parts that are liable to leak ,check main connection points for oil seepage and tubing for cracks .
Maintenance Service and Trouble Shooting Analysis of Trouble Low efficiency of a refrigerating compressor refers to the actual reduction of gas discharge capacity ,and hence the corresponding reduction of refrigerating capacity ,under the condition that the refrigerant in the system is unchanged .
Maintenance Service and Trouble Shooting refrigerating effect is due to the accumulation of refrigerating oil left in the evaporator tubing in case no other troubles have been found . To clear off refrigerating oil left in the evaporator ,dismantle the evaporator ,purge it thoroughly and then dry it .In case it is difficult to dismantle it ,charge refrigerant from the evaporator inlet to wash it several times ,then purge and dry it with nitrogen .
Maintenance Service and Trouble Shooting heard ,and no will gush out of the process tube if you cut it open after shutdown . Remedy Check the whole machine , particularly those locations which are liable to leak .After leak points have been found ,repair them or replace them with new parts according to specific circumstances ,then evacuate the system and finally charge refrigerant.
Maintenance Service and Trouble Shooting caused by dirt , tapping the suspicious clogged point (generally in the capillary or the connection joint of the filter) may cause the refrigerant to flow through partially, resulting in some corresponding change, whereas in that case if you heat it with a hot towel, no reaction will happen, no flowing sound can be heard, moreover, there is no periodic change.
Maintenance Service and Trouble Shooting The cause of sudden stop of a compressor during its running is mostly that the gas suction pressure and/or discharge pressure exceed their respective prescribed ranges, thus making a pressure-operated protective relay shut off the power to the compressor and stop it. In the following we discuss mainly the reasons for causing excessively high gas discharge pressure and low suction pressure.
Maintenance Service and Trouble Shooting temperature sensor has not been installed properly, frequent stoppage is also likely to occur. Remedy Try to adjust the temperature sensor's position until the compressor can be started and stopped normally. If this cannot be achieved, and the stoppage still occurs repeatedly, it is most likely that the mechanical parts or contacts are out of order, disassemble the thermostat, make a thorough checkup and repair it.
Maintenance Service and Trouble Shooting a) Check the input power circuit to see whether where is voltage of the power supply, namely, the circuit which is connected to the knife switch. This can be determined with an avometer or a test pencil. If a blown fuse is found, ascertain and remove its cause, then replace it with a new one of the same specifications. b) Check the compressor accessories, including its thermal protector and relay.
Maintenance Service and Trouble Shooting avometer. If short circuit occurs or the resistance of a certain phase is low, this means that short circuit does exist in the windings and/or between turns, and insulation layers have been burned or deteriorated. A megameter can be used in this inspection, too. I f the insulation resistance is lower than 2 MΩ, this means that the insulation layer is already breakdown. If the motor has been burned, repair it or replaced it with a new one.
Maintenance Service and Trouble Shooting position is to be used for fast freezing or continuous running, its temperature for power off is too low, therefore, the compressor won't stop and the temperature in the refrigerator becomes lower and lower . b) Inspection method: check the temperature control knob to see whether it is set in the position "coldest".
Maintenance Service and Trouble Shooting dissipation make the compressor running without stop. F. Electric leakage of refrigerator 1) Slight electric leakage Electric insulation has deteriorated due to being affected with damp, thus resulting in slight electric leakage. 2) Serious electric leakage Refrigerator case has become live due to faults occurred in some electric devices or the erroneous wiring in installing power cord plug or outlet by the user. This is very dangerous.
Maintenance Service and Trouble Shooting 4) Inspection method To find the sources of noise, press the vibration spot with your hand while the refrigerator is in operation and listen attentively whether the vibration becomes weake or vanishes. If the refrigerator has not been levelly placed ,put a level meter on its top table and adjust the leveling screws on its legs .
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