Related Manuals for Haier RF-8888-174
Summary of Contents for Haier RF-8888-174
- 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 Specifications Refrigerating Principle Principle Of Electronic Control Troubleshooting And Repairs...
- Page 3 SPECIFICATIONS Model BC-50P/HSE02WNAWW Cavity Supply (V/Hz) 115/60 Power Consumption (kW•h/year) Unit Dimensions (WDH)(mm) 20x20x21 Unit Weight (Lbs) 46.3 Box Dimensions (WDH)(mm) 20x20x22 Box Weight (Lbs) 55.1 Box Cubic (Cubic Feet) * Specifications are subject to change without prior notice...
- Page 4 REFRIGERATING PRINCIPLE Schematic Diagram Of Refrigerating Principle Brief Description Of Refrigerating Principle For the forced air-cooling single-system refrigerator, there is only a finned evaporator mounted generally at the rear of its freezer compartment. This evaporator 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...
- Page 5 PRINCIPLE OF ELECTRIC CONTROL Schematic Circuit 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.
- Page 8 TROUBLESHOOTING AND REPAIRS 6.1 Normal Refrigerator Functions A domestic refrigerator is comprised of an electric control system and a refrigerating system. Since both systems work together, it is difficult to tell whether or not the refrigerating system is in good working condition. If any part of the refrigerating system or electric control does not work properly, the refrigerator’s efficiency will decline, operating properties will destabilize, and in worst cases, it will not function at all.
- Page 9 6.2 Common Problems Of A Refrigerator And Their Solutions Refrigerator problems are closely related to the quality of components, level of workmanship, and owner maintenance. The parameters generally used to determine the working conditions of a refrigerator include the temperature inside the refrigerator, the operating rate, electrical power consumption, noise level, and other functional indices.
- Page 10 2. Listen a. Listen to the noises made while the compressor is running. During the normal operation of compressor, a slight and uniform humming sound due to undulation of electric currents will be heard. The sounds listed below indicate a malfunction. •...
- Page 11 Because a refrigerator is a combination of several components, they are similar. In case a problem occurs, do not make a hasty conclusion based on only one problem. It is advisable to analyze or conduct troubleshooting comprehensively because several problems may share a common problem and several problems may occur simultaneously due to a certain fault.
- Page 12 Remedy According to the operating procedures, it is mandatory to turn the machine off and several minutes later, open the refrigerant charging tube and let the refrigerant flow from out, replace the dry filter, refill the refrigerant after evacuating and seal the charging port. 3.
- Page 13 dismantle, charge refrigerant from the evaporator inlet to wash it several times and clean and dry it with nitrogen. 6. Flow obstructed in refrigerating system Analysis Because the refrigerating system is not well cleaned before use, some of the filter screen meshes are clogged by dirt accumulated in the filter after using it for some time resulting in a decrease in flow rate resulting in a poorer refrigerating effect.
- Page 14 1. Refrigerating system is clogged a. Clogged with ice Analysis This is typically a result of a poor drying of refrigerating systems, improper air cleaning or blowing or substandard water content. The symptoms of this condition are: • Irregular refrigeration, extreme frosting at the clogged area, •...
- Page 15 remove part of the paste-like matter and when the filter is clogged, it will be cooler than normal. Remedy The same solution as described for the capillary clogged with dirt. 3. Problems of Compressor a. Broken gas suction and discharge valve blocks Analysis The compressor works by opening and closing the gas suction valve and discharge valve to suck and discharge the refrigerant.
- Page 16 b. Air left in the system Analysis The residual air in the system will circulate with the refrigerant in the system. The major symptoms are higher gas discharge pressure, higher discharged gas temperature, and poor refrigerating effect. The gas discharge pressure will exceed its maximum value when the compressor has run for an extended period of time as a result, making the protective relay actuate to a stop Remedy...
- Page 17 Remedy Reduce the thermal load; check the variation in voltage of the power supply. c. Abnormal thermal protection Analysis The compressor current is within its normal range, but the thermal protector actuates repeatedly. Remedy Replace the thermal protector with a new one. 3.
- Page 18 Remedy Measure the voltage with a voltmeter. If it is really too low, advice user to acquire a stabilizer to step up the voltage for efficient work 3. Check the thermal relay for proper contacts Analysis The contacts of thermal relay sometimes may be open due to the leakage of temperature sensing agent from the temperature sensor.
- Page 19 Damaged contractor and leakage of temperature sensing agent will generally occur if this is true. Remedy Replace the old one with a new one. d. Check the terminals for loose connection and electric circuits for other malfunctions 5. Mechanical Faults Of Compressor a.
- Page 20 When the thermostat doesn’t work normally, it will make the compressor run continuously resulting in low temperature achieved in the refrigerator. The fault is generally due to the fact that the contacts of the thermostat cannot be released. Remedy Dismantle the thermostat and make a thorough checkup. If it is completely out of order, replace with a new one.
- Page 21 F. Electric leakage of refrigerator 1. Slight electric leakage Electric insulation has deteriorated due to dump effect 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.
- Page 22 Remedy For a: Fasten the fan motor. For b or c: Replace the fan motor or impellers. 5. Inspection method To find the sources of noise, press the vibration spot with your hand, while the refrigerator is in operation, carefully observe whether the vibration becomes weaker or vanishes.
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