Rockwell Automation Publication 20A-IN009E-EN-P - January 2015 53
PowerFlex 70 Adjustable Frequency AC Drive
Common Symptoms and Corrective Actions
Table 23 - Drive Does Not Start From Start or Run Inputs Wired to the Terminal Block
Table 24 - Drive Does Not Start From the HIM
Cause Indication Corrective Action
Drive is Faulted Flashing red status
light
Clear fault.
• Press Stop
• Cycle power
• Set [Fault Clear] to 1
• “Clear Faults” on the HIM Diagnostic
menu
Incorrect input wiring.
See page 35 for wiring examples.
• 2 wire control requires Run, Run Forward,
Run Reverse or Jog input.
• 3 wire control requires Start and Stop inputs
• Jumper from terminal 7 to 8 is required.
Flashing green
status light
Wire inputs correctly and/or install jumper.
Incorrect digital input programming.
• Mutually exclusive choices have been made
(i.e., Jog and Jog Forward).
• 2-wire and 3-wire programming can be
conflicting.
• Exclusive functions (for example, direction
control) can have multiple inputs that are
configured.
• Stop is factory default and is not wired.
None Program [Digital Inx Sel] for correct inputs.
Start or Run programming can be missing.
Flashing yellow
status light and
“DigIn CflctB”
indication on LCD
HIM.
[Drive Status 2]
shows type 2
alarms.
Program [Digital Inx Sel] to resolve conflicts.
Remove multiple selections for the same
function.
Install stop button to apply a signal at stop
terminal.
Safe Torque Off Option Installed
• Hardware Enable Input “Digital In 6” not
present.
Flashing yellow
status light and
“Not Enable”
indication on LCD
HIM.
Verify correct wiring to “Digital In 6.”
Check for presence of signal.
Safe Torque Off Option inputs not present. Flashing yellow
status light and
“Safe-Off”
indication on LCD
HIM.
Wire inputs correctly on Safe Off option
terminals 1...4.
See the DriveGuard Safe Torque Off Option
User Manual, publication
PFLEX-UM003
for more information
Cause Indication Corrective Action
Drive is programmed for 2-wire control.
Human Interface Module (HIM) Start
button is disabled for 2-wire control.
None If 2-wire control is required, no action is necessary.
If 3-wire control is required, program [Digital Inx Sel]
for correct inputs.
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