in the market, there are generally two types of tube ice generator in heat insulation. The most simple one is wrapped by thermal insulation cotton, this way is a cheap way, another type is wrapped by stainless steel plate outside and inject with high density PU Foam, we use this type, and it performs much better than the first one. Industrial Ice Block Machine, Small Clear Ice Maker, Soukoo Ice Maker, Industrial Ice Cube Machine,Ice Cube Machine For Sale. Block Ice: Large blocks of ice that can be crushed for cooling or ice carving. The product will supply to all over the world, such as Europe, America, Australia,Sheffield, Bhutan,Iraq, Thailand.3. check the Refrigeration System, before that pls check the pressure gauge to see if the pressure are in proper, if no gas there are leakage, once leakage are happens, pls check all the welding points and do the repair welding. if pressure are in order, pls also check the dryer filters, condenser fan and compressor for sure.