Dongguan Yinyin Hardware Products Co., Ltd. is a comprehensive enterprise that integrates production, service, sales, and after-sales support. We welcome all buyers to negotiate and collaborate with us. As a professional manufacturer specializing in silver contacts (in-mold riveted parts), stamped components, and low-voltage switches (such as wall switches and leakage protection switches), we focus on "safe electricity, safe switches, and safe electricians." Thank you for your attention! We are committed to delivering the most complete and reliable power safety solutions to our customers.
Refrigerators are complex appliances, and the causes of failure can vary greatly. Through practical experience, it has been proven that using the "observe, listen, and ask" method can effectively identify the root cause of the problem.
1. **Observe**: This involves visually inspecting or using instruments to check various parts of the refrigerator. Use a multimeter to check the voltage supply and whether the motor winding resistance is normal. A megohmmeter can be used to measure the insulation resistance of the refrigerator, which should be above 2MΩ. If everything checks out, proceed with a test run.
Use an ammeter to measure the starting and running current. Open the door to check the frost condition on the evaporator. If the current values are not within the expected range or the frost is uneven or incomplete, there may be an issue. A thermometer can help assess the cooling speed; if it’s significantly slower than usual, this indicates a problem. Observe whether the capillary tube and dryer filter are condensing, if the compressor suction line is frosted, or if the door area is condensing. These signs can help determine if the refrigeration system is clogged, if there is excess refrigerant, or if the capillary tube is faulty. Check the surface of the refrigeration piping, especially at the joints, for oil stains. The presence of oil suggests a leak.
2. **Listen**: This refers to using your ears to detect any unusual sounds while the refrigerator is running. For example, check if the motor is running smoothly, if the compressor makes strange noises, if there is airflow in the evaporator, or if the starter and thermal protection relay produce abnormal sounds. Abnormal sounds include:
- “Tat-tat-tat†– a metallic impact sound from inside the compressor, indicating internal moving parts are colliding due to looseness.
- “Dang-dang†– a sound caused by the inner suspension of the compressor breaking or coming loose.
- No airflow sound in the evaporator – may indicate a blockage in the refrigeration system.
3. **Ask**: This means carefully asking the user about the transportation conditions, usage environment, and other relevant factors during the operation of the refrigerator. Keep detailed records to help analyze the fault.
Founded in 2005, Dongguan Yinyin Hardware Products Co., Ltd. specializes in manufacturing a wide range of products, including silver contacts, electrical contacts, double composite silver nails, riveted silver contacts, soldered silver contacts, precision stampings, conductive copper posts, contact screws, electrical screws, DC and AC pins, copper sleeves, hollow needles, semi-hollow needles, four guides, rivets, silver dots, binding posts, AV copper sleeves, 3F07 copper sleeves, 3F05 copper sleeves, 215 copper sleeves, and more. The company also produces various products made from silver, copper, iron, aluminum, and non-magnetic steel. Contact Mr. Chen at 13728192869 for more information.
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