Chapter 6 – Service and Maintenance
ACS 501 Installation & Start-up Manual 6-3
9. Measure between X6 and X8. The meter should register approximately
0.8 and infinity, accordingly.
10. If your readings differ from the values in Steps 7 – 9, replace the
Rectifier Module.
Resistance Test
1. Follow Diode Test Steps 1 – 5, above.
2. Set your multimeter to test resistance. If your multimeter has a diode test
function, disregard the Resistance Test and continue with Diode Test
Steps 6 – 10 above.
3. Measure the rectifier as in Diode Test Steps 7 – 9 above. The meter
should register a range from 100 to 10,000 ohms and infinity,
accordingly.
4. Connect the multimeter positive test probe to Terminal X8 and measure
each X1 phase pole with the multimeter negative test probe. The meter
should register a range from 100 to 10,000 ohms and infinity,
accordingly.
5. If your readings differ from these resistance values, replace the Rectifier
Module.
ACS 501 – 007 to 040
Diode Test
1. Disconnect and lock out power from the ACS 501.
WARNING! Wait at least five minutes after disconnecting power from the
drive before you attempt to service the drive. Bus capacitors in the
intermediate circuit must discharge before servicing the drive. Check for zero
volts at Terminals X50:21 – 29 and X2:(+) and (-) or between the input
terminal block X1 and Terminal Block X2:(+) if an internal brake option is
installed. Failure to check voltage may result in death or serious injury.
2. Check for zero volts at Terminals X50:21 – 29 and X2:(+) and (-) or
between the input terminal block X1 and Terminal Block X2:(+) if an
internal brake option is installed.
CAUTION: Electrostatic Discharge (ESD) can damage electronic circuits.
Do not handle any components without following the proper ESD
precautions.
Note: When disconnecting wires from components and terminals, mark the
wires to correspond to their component and terminal connections.
3. Remove all control wiring from the Control Interface Card.
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