Make sure the coil is moved or when a severe fault occurs coil deviations and potential hazards, which test both single-phase and three-phase equivalent to the test 2.
A check that the coil is a severe FAULT occurs, which coils and deviation occurs may be a short circuit which tests both single phase and three phase-equivalent. To Test 2.
It is a winding check to ensure that there is a moving or not, when a severe FAULT winding will cause a deviation and may cause a short circuit which is both a test and a single phase three phase equivalent to Test 2.