Rockwell Automation GV3000 AC Pwr Module Ver. 5.0 Hardware Ref, Installation, and Troubleshooting - Manual (Page 75)

9Ć1
9.0 TROUBLESHOOTING THE DRIVE
This chapter describes how to troubleshoot the drive and the equipment that is needed to do so.
Also provided are replacement part lists and information on clearing faults.
9.1 Test Equipment Needed to Troubleshoot
An isolated multimeter will be needed to measure DĆC bus voltage and to make resistance checks.
9.2 Drive Alarms and Faults
The drive will display alarm and fault codes to assist in troubleshooting when a problem develops
during selfĆtuning or drive operation.
If an alarm condition occurs, the drive will continue to run and a 2Ć or 3Ćdigit alarm code will flash on
the display.
If a fault occurs, the drive will coastĆtoĆstop and a 2Ć or 3Ćdigit fault code will flash on the display.
Refer to the GV3000 Software StartĆUp and Reference Manual (D2Ć3339) for more information on
drive alarms and faults.
9.3 Verifying That DĆC Bus Capacitors are Discharged
DANGER
DĆC BUS CAPACITORS RETAIN HAZARDOUS VOLTAGES AFTER INPUT POWER HAS BEEN
DISCONNECTED. AFTER DISCONNECTING INPUT POWER, WAIT FIVE (5) MINUTES FOR THE DĆC
BUS CAPACITORS TO DISCHARGE AND THEN CHECK THE VOLTAGE WITH A VOLTMETER TO
ENSURE THE DĆC BUS CAPACITORS ARE DISCHARGED BEFORE TOUCHING ANY INTERNAL
COMPONENTS. FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN SEVERE BODILY
INJURY OR LOSS OF LIFE.
The GV3000 drive's DĆC bus capacitors retain hazardous voltages after input power has been
disconnected. Perform the following steps before touching any internal components:
Step 1. Turn off and lock out input power. Wait five minutes.
Step 2. Remove the drive's cover.
Step 3. Verify that there is no voltage at the drive's input power terminals.
Step 4. Measure the DĆC bus potential with a voltmeter.
For 1Ć60 HP drives, measure the DĆC bus potential at the DĆC bus power terminals. See
figures 9.1 and 9.2.
For 60Ć100HP drives, while standing on a nonĆconductive surface and wearing insulated
gloves (600V), remove the top two screws of the regulator panel and tilt the panel forward.
See figure 9.3. Measure the DĆC bus potential at the diode bridge as shown. ReĆattach the
regulator panel.