16
3.4
Operation
The VFD is controlled by the control panel RUN/STOP and SPEED ADJUST controls. The FAN ON indicator
shows the motor status – in case of a fault it will turn off.
To avoid overheating the motor due to lack of airflow, the fan should never be operated unless at
least one damper is open.
3.5
Troubleshooting
The latest generation of VFDs is remarkably robust and reliable. In addition, they have extensive self-
protection and self-diagnostic capabilities. In case of drive failure, error code(s) are displayed which
point towards fault correction procedures. See section 13 of the Invertek Optidrive ECO User Guide (or
the appropriate sections for the other drive types) for detailed information.
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