If on the vehicle you will need a set of gauges hooked up on the low and high sides and if the pressure in the system is equal then the compressor is no good............
If the compressor is off the vehicle the only thing that you can go is rotate the front clutch hub and see if you have both suction on the low side and pressure on the high side, while turning the hub cap off the back ports one at a time.............
There are a few ways to test a hermetic compressor for efficiency.Compressor Vacuum TestClosed-Loop Compressor Running Bench TestClosed-Loop Compressor Running Field TestCompressor Running Test in the System
There are a few ways to test a hermetic compressor for efficiency.Compressor Vacuum TestClosed-Loop Compressor Running Bench TestClosed-Loop Compressor Running Field TestCompressor Running Test in the System
To test a compressor if locked up read the tag on compressor for locked rotor amps, then bypass safety therm-o-switch found under protective black cover on compressor, and with a clamp-on amp meter momentarily run compressor to check amperage.
test
see API 618 description
I'm in the process studying for my epa test and this is one of the questions and their answer is foaming occurs in the compressor.
test is dead he was reported dead by a neighbor
With an ohm-meter. Check for continuity in the RUN and START windings, and also from the terminals to compressor case for shorting. There should be continuity in the windings and no continuity from windings to compressor case.
just disconnect power & get ur Ohmmeter,and test ; Start-Run//Common-Run//Common-Start..... you should get the same readings on all 3 phases if the compressor is good !!
Do a compressor oil acid test.
Yes. A megohm test is a way of determining the condition of the compressor's winding insulation. If the insulation is deteriorated or beginning to deteriorate, a megohm test will show this. Generally speaking, 20 megohms or less shows bad motor winding insulation. When AC voltage is applied to a compressor that has bad windings, it will likely blow a fuse as it will short to ground. Moisture in the system can cause a false megohm reading. Also, it is not advisable to test a system that is in a vacuum, as this also can cause a false reading. If a compressor is grounded, a regular multimeter set to ohms will determine this (one probe on any of the compressor terminals and one to the discharge or suction line pipe). A megohm meter will show that a problem is eminent even if the compressor is not yet fully grounded and blowing fuses.
A/C compressor? You need to hook an A/C manifold guage and check low/high side pressures.