Rockwell Automation Allen-Bradley PowerFlex 20P Hardware Service Manual

122 Rockwell Automation Publication 20P-TG002B-EN-P - February 2018
Appendix C Flow Charts
Control Power Supply Failure
This chart presents the steps for troubleshooting a Power Failure fault (F3).
No
Is the fuse blown?
No
Yes
Yes
Replace the fuse,
disconnect the cable
from connector XA on
the control board, and
apply AC control power.
No
Is the drive
operational?
No
Yes
Use an ohmmeter to
verify that all terminals
on the control board
terminal blocks are
not short circuited.
Are terminals
short circuited?
No
Yes
Remove the cable from
connector XR on the
control board and
ohmmeter all voltage
testpoints and commons
to verify no short
circuits (values should
be > 200 kilohms).
Repair the short circuits.
Any values lower
than 200 kilohms?
Replace the
control board.
Yes
No
Remove the cable from
connector XFCD on the
control board and
ohmmeter between
pins 1 and 2, and
3 and 2, on the cable
to verify no short circuits
(values should be
> 200 kilohms).
Any values lower
than 200 kilohms?
Yes
Remove power from
the drive and replace
the fuse on the switching
power supply board.
Remove the switching
power supply board
from the drive.
Apply power to the
switching power
supply board only.
No
Yes
Remove all power
from the drive.
Check all external
wiring to the pulse
transformer board,
including the motor
PTC, if used for a short
circuit condition.
No
Yes
No
Measure the Voltage
at terminals U2, V2.
Is the correct
voltage present at
U2, V2?
Verify the wiring and
power source to U2, V2
and correct any problems.
Remove AC control power
and remove and test the
fuse (F1) at the top of
the drive.
Replace the switching
power supply board and
apply AC control power.
Replace the
control board.
Replace the
eld board.
Replace the pulse
transformer board.
Repair the
short circuits.
Any short circuits?
Is the fuse blown?
Is the fuse blown?
Replace the
switching power
supply board.

Rockwell Automation Allen-Bradley PowerFlex 20P Specifications

General

Brand	Rockwell Automation
Model	Allen-Bradley PowerFlex 20P
Category	DC Drives
Language	English