IMPULSE•VG+ Series 3 Instruction Manual – 07/25/05
6-3
Troubleshooting the Drive
In this troubleshooting section, “check,” means investigating whether an item is functioning and in
an acceptable physical condition, and then taking corrective action (adjusting, fixing, replacing,
etc.) as necessary. In the Corrective Action column, you may not have to perform all of the steps to
correct the problem.
Maintenance and Inspection
This section describes basic maintenance and inspection procedures for the IMPULSE•VG+Series 3.
Alarm and Fault classes are described as follows:
• Major Fault: Brake is set, operation indicator lights flash, fault is displayed on keypad and fault
contact output (terminals MA, MB, & MC) are activated. The reset key must be pressed, a multi-
function input set for fault reset or power must be cycled in order to continue operation.
• Fault (minor): Brake is set, RUN Led flashes until run command is removed, fault is displayed
on keypad, fault contact output (terminals MA, MB, & MC) are not activated. The reset key
does not need to be pressed. The drive will attempt to run again at the next run command.
• Alarm (Warning): Operation continues, fault is displayed on the keypad, fault contact output
(terminals MA, MB and MC) are not activated.
Motor Faults and Corrective Actions
Component Check Corrective Action
External terminals, connectors,
mounting screws, etc.
Loose screws or connectors Securely tighten.
Heatsink Build-up of dust and dirt Blow with dry, compressed air (57-86 psi).
Printed Circuit Board (PCB) Accumulation of conductive dust
or oil
Blow with dry, compressed air (57-86 psi). If dust
and oil cannot be removed, replace the board.
Cooling Fan Abnormal noise and vibration Clean or replace the fan.
Power Components Accumulation of dust or dirt Blow with dry, compressed air (57-86 psi).
Symptom Corrective Action
Analog frequency reference is not stable. (drifting) 1. Stabilize the analog source.
2. Increase B2-02.
3. Increase B5-01, -02.
No motor rotation. 1. Verify that power is on (Charge LED).
2. Verify that the keypad display is not showing a fault.
3. Verify that the run command is input to the drive (U1-10).
4. Motor stalled due to excessive load.
Motor rotation is in the wrong direction. 1. Verify FWD/REV or UP/DN is correct at the interface card.
2. Match wiring to the phase order of the motor leads T1, T2, T3.
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