A: Fix refrigerator is strictly not allowed to add methanol, it can prevent the ice blocking, but harmful to the compressor and pipeline system, as long as you pay attention to in maintenance and operation is generally not ice wall, blocked no way is really add a little bit of methanol, as the beverage bottle cap 1-2 cover,Can't add much. Generally speaking, the vacuum, when after add up to make refrigerator system into a small amount of refrigerant to work for a few minutes and then half an hour of pumping air into vacuum state,After being smoked finish formal refrigerant injection.

Ice wall after a day or two it should be plugged in maintenance, if capillary frozen added also useless, methanol is usually in advance to prevent freezing, methanol is not pure, with water, after joining the fridge or blocked.Now the filter inside quality of molecular sieve as before, and quantity, perfunctory.

Nitrogen is the best way to break into the 0.8 MPA, the casing with 100 w bulb heating evaporator, with hair dryer, condenser with a neutral flame of compressor even heat 3 minutes (water in oil is bad treatment or replace the oil pressure) and then quickly put within the refrigeration system of nitrogen gas.High and low pressure with nitrogen gas blowing, open big filter drier, put on the new color silica gel on the system, the process of pumping air into vacuum state, finally add a little refrigerant, and then put on the new filter drier.Or negative pressure let stand for a few hours or longer, let the water gasification, vacuum for 1 hour again, add refrigerant of commissioning, in dry filters, not after a few times more in capillary.