In the process of using outdoor air conditioning machine after the copper frost is going on,
Experienced maintenance personnel in high-pressure pipeline refrigeration on the ice to see that the air conditioner refrigerant is less, if that is the amount of refrigerant low pressure pipeline ice too much (this phenomenon appears less, if there is great harm on the air conditioning compressor)Whether the air conditioner refrigerant in the normal visual has the following tips:1, on the first one or two minutes at the link of copper, copper pipe small (high pressure pipe) ice, but soon automatic open, less refrigerant inside the machine, but also maintain a certain cooling capacity.2, if the small copper pipe icing for a long time, basically no refrigeration capacity.3, continuous boot to see large copper tube (low pressure pipe), if it is dry, there is no condensation water, refrigerant must be less.4, continuous operation, icing big brass, too much refrigerant, jeopardize the compressor.5, continuous boot, the size of two copper tubes are dew, refrigeration dose basically appropriate.
Like Freon enough or valve not completely open, this season there is a little frost outside may also be normal, the environment is relatively cold
1, it may be fluoride deficiency. 2, the internal and external connection copper pipe has the folding suppression place. The three is where the high pressure pipe is blocked.
In the air conditioning process, as long as the control operation of standardized, startup after refrigeration is good, do not need to add refrigerant. But for the use of micro leakage or in moving due to slow emptying, the refrigerant will trace reduced, or due to moving in pipe lengthening and other factors, the air conditioner running for a period of time will not be able to meet the 4 conditions of normal operation, the pressure is lower than 4.9kg/ (mm) 2; pipeline current is reduced; in frost; machine air temperature does not meet the requirements, it is required to add refrigerant. During operation, the adding of fluorine must be carried out from the low pressure side. Fluoride, unscrew the cap process first outdoor machine low pressure gas valve repair on the mouth, according to the public and English requirements of choosing gas pipes; with the trachea with thimble end, the filling valve thimble top opening communicated with the refrigeration system, the other end is connected with a three gauge. One end of the other end of the trachea is connected with the three meter table, and the other end is hollow R22 cylinder, and the refrigerant in the system is used to exhaust the air of the connecting pipe. Hear the creaking of mouth L2 seconds, that air is exhausted, tighten the nut with tracheal, open refrigerant bottle valve. Turn the gas bottle upside down and slowly add fluoride. When the table pressure reaches (4.9 - 5.4) kg / (CM) 2, it indicates that the refrigerant is adequate. Close the bottle valve, the air conditioner to continue running, observe current, pipeline condensation phenomenon, when the outdoor machine water condensation water outflow, the low pressure gas pipe (coarse) valve condensation, confirm the system in good condition after unloading, maintenance process under low pressure gas with the trachea, tighten the insurance cap, refrigerant work.
