AWA Troubleshooting
This happens even when other manufacturers meggers and hi-pots show the cable
run/motor as being good. AWA seems to perform properly on all other motors and
conditions.
a. In certain cases it is possible for the AWA to be programmed to coincide with the
natural resonance of the cable run and the motor. It is almost always cleared by
changing the “STEP VOLTAGE” field in the DC TESTS screen. For example: STEP
VOLTAGE is set to ‘”50” and the AWA will trip itself. By changing this setting to
“25” or “15” the test sequence can be concluded successfully.
23. AWA always "hangs" up after
concluding a resistance balance test
sequence.
a. Use CTRL – ALT – Del to bring up the task manager and end the Analyzer
application. Don’t just hit the circuit breaker. You may damage or destroy Windows
NT the AWA operating system.
b. This message is almost always related to the 80-100 AD/IO board, and the circuitry
responsible for initiating a test. Replace the entire assembly, or the following I.C.’s
c. U31,32 Mux08 multi-plexers
d. U10 DAC
e. U22 AMP01
f. U11 SMP11GY
g. U6 ADC912
h. The ADC clock (crystal) may be damaged or broken. A 1MHZ signal should be seen
at U6 pin 17 and 18. It should be approximately 4.5VDC in amplitude.
i. If the front panel of the AWA has been loosened or removed to service the unit, the
AUX DB25 connector may have been damaged. Look at the rear of it. You will see a
bunch of .01 microfarad capacitors soldered across the AUX pins. If these have
shorted out to each other by being set on something, they will give unknown signals
to the AD/IO and confuse it. Use needle nose pliers to separate the capacitors.
