1. Improper adjustment of the refrigeration expansion valve and overflow valve, excessive adjustment of the refrigerant in the system, the presence of air in the cooling system, poor sealing of valve plate parts, wear of the compressor cylinder liner piston, etc.
2. The high-pressure output buffer pipe in the compressor is damaged, the screw fixing this pipe is loose, the high-pressure pipe is not exhausted, and the low-pressure pipe is not suctioned, so the compressor works but does not cool.
3. The refrigerant leaked, and all the refrigerant ran out. The compressor runs, but the system has no refrigerant and absorbs heat through evaporation, so the temperature of the freezer does not drop.
4. The capillary tube is blocked, the refrigerant evaporates to the evaporator, does not enter the heat absorption, and the temperature of the freezer does not drop.
5. The refrigeration system has leaks due to brazing or improper use of the blast furnace freezer. The freezer refrigerant in the refrigeration system is completely missed within a certain period of time and cannot be cooled.
6. Confirm whether the freezer is used correctly. The different positions will affect the power consumption and temperature of the freezer.
