Haier RF-8888-174, Service Manual

Page 1: ...HAIER TOP MOUNTED REFRIGERATOR FREEZER SERVICE MANUAL PART RF 8888 174 HAIER AMERICA TRADING LLC www haieramerica com ...

Page 2: ...TABLE OF CONTENT Content 2 Specifications 3 Refrigerating Principle 4 Principle Of Electronic Control 5 Troubleshooting And Repairs 7 ...

Page 3: ...vity Supply V Hz 115 60 Power Consumption kW h year 315 Unit Dimensions WDH mm 20x20x21 Unit Weight Lbs 46 3 Box Dimensions WDH mm 20x20x22 Box Weight Lbs 55 1 Box Cubic Cubic Feet 5 4 Specifications are subject to change without prior notice ...

Page 4: ...r achieves refrigeration of refrigerator and freezer compartment Cool air is send to the refrigerator and freezer compartment by air ducts the temperature in the freezer compartment is regulated with the freezer thermostat whereas the temperature in it s refrigerator compartment is controlled by regulating the throttle or alternatively using a refrigerator to control the start and stop functions o...

Page 5: ...rcuit Diagram A POWER PLUG B THERMOSTAT C OVERLOAD PROTECTOR D COMPRESSOR E PTC Brief Description of Control Principle BC 50P HSE02WNAWW is a direct cooling single system refrigerator without freezer compartment a mechanical type of control is ...

Page 6: ...generally adopted The thermostat directly controls the start and stop function of the compressor and hence the refrigerator temperature ...

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Page 8: ...gerant flows momentarily after the compressor has stopped running This sound therefore does not constitute a problem 2 Clicking noises Refrigerators often make clicking noises This is also normal It is the result of the intake or release of the armature of a current dead weight start relay when the compressor is started The compressor motor makes a clicking sound while it is running This sound is ...

Page 9: ...trument for the domestic refrigerator The location and nature of problems must therefore be determined according to their respective features Experience in servicing is very important for troubleshooting Well experienced service technicians can correctly identify and solve problems based on their comprehensive analysis of the characteristics of the particular problems as well as the operating cond...

Page 10: ...und can be heard the filter or capillary is clogged 3 Touch and Feel a Feel the compressor while it is running Its temperature should be less than 90ºF Its temperature may exceed 90ºF if it has been running for an extended period of time b After the compressor has operated for 5 10 minutes feel the condenser The temperature of its upper part should be higher than that of its lower part or its righ...

Page 11: ...ts Repair them and recharge refrigerant In troubleshooting pay particular attention to possible leaking points check main connection points for oil seepage and tubing for cracks if leakages are not severe charge system with nitrogen and detect with best commonly adopted method Repair evacuate charge system with refrigerant and turn on refrigerator to make test run Drain the system of the nitrogen ...

Page 12: ...gerant in the system is unchanged This typically occurs when the compressor has been in use for a long time Remedy Measure the high and low pressures with pressure gauges to see whether they are normal If an abnormal sound comes from the compressor or the temperature of its causing is too high cut the discharge port open and operate the compressor Inspect to see if there is pressure at the dischar...

Page 13: ...orator and where the refrigerator temperature does not drop down is termed as no refrigerating There are many causes for this problem and it is relatively complex too In servicing special attention should be given to root cause of the problem Three main potential causes are analyzed below 1 All refrigerant in the system leaks out Analysis Leaking points in the refrigerating system have not been id...

Page 14: ...lter evacuate it again and fill the system with refrigerant b Refrigerating system clogged with dirt in capillary Analysis The capillary inlet is a place where coarse grained dirt or refrigerant oil in the system settle When considerable dirt accumulates there the whole filter screen may be blocked totally making the refrigerant unable to go through Clogging with dirt exhibits the same symptoms as...

Page 15: ...ter will swing drastically and the discharge pressure will be very high In both cases stop the compressor at once If possible open the cylinder cover check the valve block and repair it replace with a new one C Compressor suddenly stops during operation running Most cause of sudden seizure of compressor is as result of the gas suction pressure and or discharge pressure haven exceeded their respect...

Page 16: ...d it is easier for the air to go into the system Once it is clear that air does exist in the system open the tubing re evacuate it and then charge it with refrigerant 2 Stoppage due to electric failures a Thermostat is out of control Analysis When the thermostat does not work or it s temperature sensor is not properly installed frequent stoppage is likely to occur Remedy Adjust the temperature sen...

Page 17: ...er failure poor contact of switch and a blown fuse Make a comprehensive analysis of these situations find out the real cause and correct problem Remedy a Check the input power circuits for proper voltage power supply i e the circuit that is connected to the knife switch This can be determined with a voltmeter or a test pencil If a blown fuse is found ascertain and remove its cause then replace it ...

Page 18: ... of motor and other electrical faults a Motor windings are damaged or there is a short circuit between turns Analysis When motor windings are damaged or short circuited between turns the fuse will blow continuously and the blow out particularly occurs at that instance where you close the knife switch Remedy Check the terminals and the outer casing for short circuits and measure the resistance of e...

Page 19: ...um sound will be heard and several seconds later the thermal protective relay will actuate and open the contacts This process will occur repeatedly but the compressor will not start E Compressor does not stop Mostly the compressor runs continuously for several hours unending If the food placed in the refrigerator is not too much there may be the following two situations i Control system is probabl...

Page 20: ...nable to cut off the power supply to the compressor and stop it Remedy If it is clear that the refrigerant in the system is insufficient in quantity recharge it with refrigerant In case clogging occurs disassemble the part where it is blocked If the evaporation temperature is too high settle this problem with an appropriate quantity of refrigerant 4 Non stoppage of compressor due to damaged heat i...

Page 21: ... and the case body with a voltmeter the reading will be zero 0Ω in the worse case the fuse will blow Check the 3 prong outlet to see whether the live wire and the null line are inversely connected One possibility is that the live wire and null line of the outdoor power supply circuit have been inversely connected this makes the null line become a live wire G Stronger vibration and loader noise 1 R...

Page 22: ...serve whether the vibration becomes weaker or vanishes If the refrigerator has not been levelly placed put a level meter on the top table and adjust the leveling screws on its legs In case noise occurs from the compressor strike different locations on the side surface of its case using a rubber hammer or hand hammer with a wood block in between to determine whether the suspended springs are out of...