Troubleshooting The Drive; Test Equipment Needed To Troubleshoot; Drive Alarms And Faults; Verifying That D-C Bus Capacitors Are Discharged - Reliance electric GV3000 Instruction Manual

9.0 TROUBLESHOOTING THE DRIVE
9.1
9.2
9.3
This chapter describes how to troubleshootthe drive and the equipmentthat is neededto do so.
Also provided are replacement part lists and information on clearing faults.
Test Equipment Needed to Troubleshoot
An isolated multimeter will be needed to measure D-C bus voltage and to makeresistance checks.
Drive Alarms and Faults
The drive will display alarm and fault codesto assist in troubleshooting when a problem develops
during self-tuning or drive operation.
If an alarm condition occurs, the drive will continue to run and a 2- or 3-digit alarm code will flash on
the display.
If a fault occurs, the drive will coast-to-stop and a 2- or 3-digit fault code will flash on the display.
Refer to the GV3000 Software Start-Up and Reference Manual (D2-3339) for more information on
drive alarms and faults.
Verifying That D-C Bus Capacitors are Discharged
D-C BUS CAPACITORS RETAIN HAZARDOUS VOLTAGES AFTER INPUT POWER HAS BEEN
DISCONNECTED. AFTER DISCONNECTING INPUT POWER, WAIT FIVE (5) MINUTES FOR THE D-C
BUS CAPACITORS TO DISCHARGE AND THEN CHECK THE VOLTAGE WITH A VOLTMETER TO
ENSURE THE D-C BUS CAPACITORS ARE DISCHARGED BEFORE TOUCHING ANY INTERNAL
COMPONENTS. FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN SEVERE BODILY
INJURY OR LOSSOFLIFE.
The GV3000 drive's D-C bus capacitors retain hazardous voltagesafter inout 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 D-C buspotential with a voltmeter.
For 1-60 HP drives, measure the D-C bus potential at the D-C bus power terminals. See
figures 9.1 and 9.2.
For 60-100HP drives, while standing on a non-conductive surface and wearing insulated
gloves (600V), removethe top two screwsof the regulator panel and tilt the panel forward.
See figure 9.3. Measure the D-C bus potential at the diode bridge as shown. Re-attach the
regulator panel.
9-1