Mechanical failures
Most mechanical failures are caused by liquid stroke, moisture in the system, impurity or contamination and low oil level.
Liquid Strike: the compressor compresses liquid due to the poorly dimensioned system, causing a poor performance, break in the suction or locking valve (use liquid separator),
Humidity in the System: the moisture mixes with the refrigerant forming acids that attack all metallic surfaces (valve plate, shaft, etc.), removing the insulation layer of the electric motor, which can freeze the capillary outlet; over time the engine burns out (use vacuum pump with vacuum gauge),
Impurities: due to copper burrs, nitrogen-free soldering, dirty tubing, especially in a system that caused the compressor to burn and was not properly cleaned or the dryer filter was replaced.
These irregularities cause low performance, noise, crash or even the engine burns,
Contamination: methyl alcohol or any antifreeze is extremely harmful to the refrigeration system. The filter drier retains more alcohol than water. Alcohol is trapped in the filter desiccant, and water continues to circulate and damage the system, corroding metal parts and burning the engine,
Low Oil Level: due to a poorly dimensioned system in which the oil did not return to the compressor, causing noise and locking of the internal parts (use oil separator).
