First, the electrical part: 1. Clean the dust on the switchboard. Do not touch the water. 2. Fasten the thick wire diameter and high current screw terminal. 3. Check the circulating fan fixing screws to prevent loosening in long-term operation. 4. Observe whether there are discoloration or scorch marks in the large current contactor and circuit breaker (control compressor, fan). If it is replaced in time. Second, the frozen part: 1. Clean the condenser (every three months) regularly to avoid overheating alarm when the ambient temperature exceeds 30 degrees. 2. When the equipment is not used for a long period of time, the compressor is started once every 2 weeks, and each time is about 1 hour. 3. It is forbidden to stop at low temperature (below 0 degree) to avoid air leakage and frosting on the equipment door. 4. The compressor noise is normal and dull and stable. In the event of abnormal sounds such as sharp ears, you should immediately notify the Hongsheng instrument manufacturer. 5G Travel Toothpaste,Small Toothpaste For Travel,Bulk Mini Toothpaste,Travel Pack Toothpaste Shenglong Co.,Ltd , https://www.sl-oralcleaning.com