Remove the wiring from the three terminals before testing..
Check the compressor for resistance to ground.
With the wiring removed from the compressor terminals, test the resistance of each terminal to ground.
With the wiring still removed from the compressor terminals, test the resistance between pairs of terminals ( T1-T2, T1-T3, T2-T3.
If infinite reading is obtained between any pair of terminals then there is open winding in the compressor.
By opening the in the case of high amperage or overheating, Internal overloads protect the If the compressor is hot to the touch you must allow it to cool down and before testing again. If the compressor is cool and continues to read infinite resistance then the compressor must be replaced..
With the wiring still removed from the compressor terminals, test the resistance between pairs of terminals.
The resistance between each of the three pairs of terminals should read the same.
Reconnect the wiring to the compressor terminals. CAUTION scroll and screw compressors must be checked for rotation after wiring is completed...
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