Is it a problem that the liquid ammonia refrigerator will not open for ten days in cold weather?

No problem. In the cold winter in the northern region, the use of liquid ammonia cold storage sometimes only uses cold storage equipment, and the warehouse is still in use. In this case, only the equipment can be stopped. Before stopping the machine, the equipment and circuits should be overhauled. Don't let the equipment fail for a long time. After overhaul, clean the equipment, extract refrigerant (liquid ammonia or fluorine) and remove cooling water from the system. Cut off the power supply of the equipment (the lamps in the museum still need power supply and cannot be completely cut off), and protect the equipment with waterproof cloth.