GE Industrial Solutions DV-300 DC Drive Users Manual - Manual (Page 351)

DV-300 Adjustable Speed Drives
——— TROUBLESHOOTING ———
8
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8 - TroubleshooTinG
The following describes possible faults and their causes.
Failure alarms in the keypad display
FAILURE ALARM POSSIBLE CAUSES
Failure supply
Fault in voltage supply = the voltages are below the permitted value
CAUTION: switch off voltage before removing terminal strips.
In most cases the cause is in the external wiring. Pull out the plug-in terminal strips of the
regulator card and enter the Reset command. If no other failures are reported, check your
wiring for a short-circuit, in some cases with the cable shielding.
If this has not rectified the fault: remove the terminal strips of the I/O option card (if
present) and try RESET once more.
If you are still unsuccessful: probably an internal fault. Contact your sales office.
Undervoltage
Undervoltage on the power circuit
Undervolt thr parameter set incorrectly (possibly 400 V set, although the device is
run on 230 V). Remedy: set parameter correctly and then acknowledge the failure via
RESET.
The incoming voltage to the terminals U/V/W of the device is too low due to:
too low an AC input voltage
poor cable connections (e.g. terminals on contactor, choke,
filter ... not properly fixed). Remedy: check connections.
Intervention of the line fuses
AC input voltage dips, or high distortion of the supply voltage
The converter has been enabled when the supply voltage is not present
Overvoltage
Overvoltage of the armature circuit
Max out voltage parameter set too low.
The drive does not operate with a field weakening, even though the set speed can be
reached only with a field weakening. Check the Flux reg mode parameter.
Overspeed Excessive motor speed in the feedback circuit.
Overspeed thr parameter set too low.
Check that the Speed fbk sel parameter has been selected consistently with the feedback
used (Encoder 1, Encoder 2, Tacho, Armature).
If an encoder or tacho generator feedback circuit is used, check the relative wiring.