The systems of the refrigerated container work normally and the refrigeration condition is also normal, but the temperature fluctuation range reflected on the dial of the temperature recording paper is too large. The reason may be: the vent is not closed, the door of the refrigerated container is not tightly closed, or the refrigerated container is partially damaged, resulting in the leakage of cold air in the box.
Generally speaking, the defrosting cycle of the refrigerator is set before cooling, and the regularity of defrosting is very strong during the cooling process. If the continuous defrosting time is too long when defrosting is performed, it indicates that the defrosting control switch is broken. If the defrost stops while the chiller is in operation, the heater is faulty.