AB F70 fault code meaning

AB / F70

Series: PowerFlex 40

Power Unit

AC drive

Meaning: Failure has been detected in the drive power section.

Possible causes

Source: Allen-Bradley PowerFlex 40 User Manual 22B-UM001 Table 4.A Fault Types P4-3~4-5

Series: PowerFlex 400

Power Unit

AC drive

Meaning: Failure has been detected in the drive power section.

Possible causes

Source:

Series: PowerFlex 700H

Power Unit

AC drive

Meaning: One or more of the output transistors were operating in the active region instead of desaturation. This can be caused by excessive transistor current or insufficient base drive voltage See Table 3.X, “Power Unit Fault (F70) Subcodes,” on page 17 for more information on this fault.

Possible causes

Source:

Series: PowerFlex Digital DC (700DC)

Sustained Curr

DC drive

Meaning: The motor CEMF is too high or the line voltage is Check the line voltage and frequency. too low.

Possible causes

Source: