IMPULSE•T Instruction Manual – October 2015
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•T.
Table 6-1: Maintenance and Inspection
Alarm and Fault classes are described as follows:
• Major Fault: Brake is set, ALM indicator LED remains lit, fault is displayed on keypad, and brake
contact output (terminals MC, MB, and MA) is deactivated. In order to continue operation, the
reset key must be pressed, and a multi-function input set for fault reset or power must be cycled.
• Fault (minor): Brake is set, ALM/indicator LED flashes, fault code flashes in the keypad brake
contact output (terminals MC, MB, and MA) is deactivated. The reset key does not need to be
pressed. The drive will attempt to run again at the next run command.
• Alarm (Warning): Brake does not set, operation continues, ALM/indicator LED flashes, fault code
flashes, brake contact output (terminals MC, MB, and MA) stay activated.
• Error: Parameter value entered is out of range or is invalid for another parameter setting.
Motor Faults and Corrective Actions
Table 6-2: 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, B5-02.
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. Check if motor stalled due to excessive current (U1-03).
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