IMPULSE•G+/VG+ Series 4 Technical Manual
November 2022
Page 190
6 Troubleshooting
6.1 Troubleshooting the VFD
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.
6.1.1 Maintenance and Inspection
This section describes basic maintenance and inspection procedures for the VFD.
Table 6-1: Maintenance and Inspection
Alarms and Faults are described as follows:
•
Fault: Brake is set, operation indicator lights flash, fault is displayed on keypad, and fault relay MB-MC is
activated. The reset key must be pressed, a digital input set for fault reset must be enabled, or power must be
cycled in order to continue operation.
•
Alarm: Brake does not set, operation continues, alarm is displayed on the keypad and ALM LED flashes, fault
relay is not activated.
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).
