1. The compressor is overloaded and operating at an excessive current. Possible causes include: excessive cooling water temperature, excessive refrigerant charge, or non-condensable gases such as air in the refrigeration system, which can lead to excessive compressor load, resulting in overcurrent and high voltage.

2. Electrical problems can occur when a low-temperature refrigeration compressor is operating at excessive current. For example, low three-phase power supply voltage or three-phase imbalance can cause excessive current or phase current; damaged communication terminals or contact corrosion can lead to excessive contact current, or insufficient phase current and excessive current.

3. The low-temperature freezer's overheating maintenance module is damp or damaged, or the central relay is damaged, resulting in poor contact. Oops! It seems the starter is overheating, and the compressor will not start.

4. A large amount of refrigerant in the refrigeration system and the compressor oil have a certain solubility. When the refrigeration system is stopped, there is a certain amount of pressure in the system, and a considerable amount of refrigerant will dissolve in the oil. The amount of solubility decreases with increasing pressure and rising temperature. 5. If the compressor crankcase is not primed during decompression, a large amount of refrigerant will boil from the oil, causing the oil to foam. This will cause the compressor to be drawn in, compressed, and discharged, resulting in hydraulic shock or oil shortage.

6. To avoid this, if the unit is not started for an extended period, power it on 8 hours before starting. Heating will automatically activate upon powering on, and oil heating will automatically stop while the refrigerator is operating. If the unit is not started regularly, simply leaving it unpowered will not cause any refrigerant to boil.