What is the cause of excessive current in the electric air conditioning scroll compressor? How to judge?

The electric air conditioning scroll compressor has excessive current, so how does this happen?
1. The compressor has an inter turn short circuit but does not reach the level of overcurrent protection.
2. The "secondary friction" of the compressor has damaged the smoothness of the friction surface, resulting in an increase in the power and current of the compressor, but has not yet reached the level of "holding the shaft" or "jamming the stationary disk", making the compressor unable to rotate.
So how to judge whether the electric air conditioning scroll compressor has excessive current?
The insulation resistance to ground of the air conditioning compressor can be checked with a multimeter. Normally, it should be above 2M Ω. If it becomes significantly smaller or close to zero, it indicates a short circuit. If the insulation resistance to ground is normal, check the resistance values of the starting and operating windings. If there is a short circuit between turns, the operating current increases.