1、Refrigerant system is overcharged with refrigerant

Cause: Excessive refrigerant causes the exhaust pressure to rise significantly beyond the normal value.

Treatment: Stop the machine and discharge the excess refrigerant in the high pressure vent.

2、There is residual air in the chiller system

Causes: If there is air circulation in the system, the exhaust pressure will be too high, the exhaust temperature will rise and the exhaust pipe will be hot, the refrigeration effect will be poor, the compressor will run soon and the exhaust pressure will exceed the normal value, forcing the pressure relay to act.

Treatment: shut down, put air at the exhaust valve hole.

3, refrigeration machine suction pressure is too low caused by the shutdown phenomenon

Cause: When the suction pressure in the system is lower than the pressure relay set value, its electric shock action and cut off the power.

Treatment: refrigerant leakage, the system is blocked.

4, cold storage unit motor overload

Causes: When using, put too much food in the library; power supply is not normal.

Treatment: reduce the thermal load and pay attention to the changes in electrical and thermal voltage.