AWA Troubleshooting
11. AWA tester gives a HiPot trip at the
activation of every meg-ohm/HiPot/PI test,
after transport to a new location.
a. Check for the presence of a true earth ground at the AC power cord. The AWA will
not allow high voltage operation without a true earth ground. It will however, perform
a resistance balance test, since it does not involve high voltages. 2 prong extension
cords will render the AWA inoperable- evidenced by the illumination of the “OPEN
GROUND” lamp.
12. AWA tester gives a flat line surge after
transport to a new testing location.
a. The same answer as given in 11a applies, the AWA will not apply high voltages
without a safety ground
13. AWA gives unbalanced resistance
results, such as .188, .257, .189 Ohms on a
known good three phase motor.
a. Occasionally it is possible for the auto-ranging algorithm of the AWA tester to be
caught between resolution ranges. If this happens, the best way to verify the
performance of the AWA tester is to repeat the resistance balance test manually, and
give the AWA more settling time between the three test leads. If balances are then
seen as accurate, the problem was in the stabilization algorithm. Versions of AWA
software after 3.0 have improvements in this area. If possible upgrade the AWA
program.
b. Clip the three red test leads together, and perform the resistance balance test: The
AWA should indicate values of less than approximately .005 ohm with all legs
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