User Guide

Minor

A transitory fault with little impact on the drive and the process (such as a transient voltage drop).

The motor does not stop.

The fault is reset automatically when the cause disappears and does not need any acknowledgment.

Medium

The fault can be generated by the application or from a non-destructive electrical fault ( such as a missing phase).

These are faults that may disappear without the need of human intervention.

The motor stops when the fault occurs and lasts longer than the filter timer, if one is configured.

Restart behavior is configured by the user during setup:

- Automatic re-start, or

- Manual Re-Start with acknowledge.

Automatic Re-Start:

The Clean Power VFD will attempt 4 times to detect whether the fault has been cleared, with each attempt separated by a time delay. If the fault is still present, the drive elevates the event to a critical failure. If not, the drive restarts.

Manual Re-Start with Acknowledge:

The drive will restart only with a reset (acknowledgment) of the fault. To use this mode, the user must have configured the way to trigger the acknowledgement. If the fault has been cleared, the drive restarts.If the fault is still present, the drive goes to the standby position.

Major

This can be a fault from the drive or an external fault (such as a loss of a STO channel).

The generated fault could be destructive and/or dangerous to human beings.

This is an abnormal situation state with imminent danger risk

Example: one STO channel is missing (mostly coming from a disconnected wire)

The fault can not be reset automatically, the user must analyze and fix the issue.

The drive restarts only if the fault is fixed and after a full reset from the user (power off / power on cycle is the default reset operation for a major fault)

Critical

This can be a fault from the drive or an external fault (such as a short-circuit).

The generated fault can be immediately destructive.

This is an hazardous condition.

The fault cannot be reset automatically.

The user must identify and fix the issue.

The drive restarts only if the fault is cleared and after a full reset from the user (power off / power on cycle is the default reset operation for a critical fault)