Allen-Bradley PowerFlex 70 User Manual

86 Rockwell Automation Publication 20A-UM001N-EN-P - July 2013
Chapter 2 Troubleshooting
Common Symptoms and
Corrective Actions
Tab le 6 through Ta bl e 1 2 describe the cause, status indication (if applicable), and
corrective action of common problem symptoms.
Table 6 - Drive Does Not Start From Start or Run Inputs Wired to the Terminal Block
Table 7 - Drive Does Not Start From HIM
Table 8 - Drive Does Not Respond to Changes in Speed Command
Causes Indication Corrective Action
Drive is faulted Flashing red
status light
Clear fault:
1. Press Stop.
2. Cycle the power.
3. Set [Fault Clear] to 1 (see page 58).
4. “Clear Faults” on the HIM Diagnostic menu.
Incorrect input wiring. Refer to PowerFlex 70
Adjustable Frequency AC Drive Installation
Instructions, publication 20A-IN009
, 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.
None Wire inputs correctly and/or install jumper.
Incorrect digital input programming.
· Mutually exclusive choices have been made (for
example, Jog and Jog Forward).
· 2-wire and 3-wire programming can be
conflicting.
· Exclusive functions (for example, direction
control) can have multiple inputs configured.
· Stop is factory default and is not wired.
None Program [Digital Inx Sel] for correct inputs
(see page 68
).
Start or Run programming can be missing.
Flashing yellow
status light and
“DigIn CflctB”
indication on
LCD HIM.
[Drive Status 2]
shows type 2
alarm(s).
Program [Digital Inx Sel] to resolve conflicts
(see page 68
).
Remove multiple selections for the same function.
Install stop button to apply a signal at stop
terminal.
Cause Indication Corrective Action
Drive is programmed for 2-wire control. 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 (see page 68
.)
Causes Indication Corrective Action
No value is coming from the source of the
command.
LCD HIM Status
Line indicates
“At Speed” and
output is 0 Hz.
1. If the source is an analog input, check wiring
and use a meter to check for presence of signal.
2. Check [Commanded Freq] for correct source (see
page 22
).
Incorrect reference source has been programmed. None 1. Check [Speed Ref Source] for the source of the
speed reference (see page 54
).
2. Reprogram [Speed Ref A Sel] for correct source
(see page 33).
Incorrect reference source is being selected via
remote device or digital inputs.
None 1. Check [Drive Status 1], bits 12 and 13 for
unexpected source selections (see page 52
).
2. Check [Dig In Status] to see if inputs are
selecting an alternate source (see page 55).
3. Reprogram digital inputs to the correct “Speed
Sel x” option in the [Digital Inx Sel] parameter
(see page 68).

Allen-Bradley PowerFlex 70 Specifications

General

Brand	Allen-Bradley
Model	PowerFlex 70
Category	Controller
Language	English