How to judge the quality of 3-phase Copeland compressor？

Copeland compressor products to 3-phase, the new bought back Copeland compressor how to determine its good or bad, you can do a simple test yourself according to the following description.

If it is inverter 3-phase compressor, then its terminal resistance value is equal. That is, measure the resistance value between the compressor terminals (U, V, W), the resistance value of any two terminals between 0.5 ~ 2 Ω.

In addition, we look at how to determine the compressor motor winding short circuit, through the ground, break. We use the multimeter to choose R×1 file, after adjusting zero, measure the resistance value of the compressor motor winding C-R or C-S two points. If the resistance value of the measured winding is less than the normal value, it can be judged that this winding is short-circuited.

Put a pen and the common point tightly against the other pen on the compressor process tube to reveal the metal part, or the shell plate of the varnish off a small piece, to measure. If the resistance value is very small, you can determine the winding or internal wiring touch shell through the ground.

The meter pen to any 2 windings of the terminal, the resistance value. If the winding value is infinity, that is, 2 windings between the terminals do not conduct can be judged that this winding disconnection.

In fact, the new Copeland compressor will not have such a problem, this problem is circumvented when the factory testing, the above method is more appropriate to measure the operation of the refrigeration compressor failure shutdown.