Rockwell Automation 8720MC 8720MC Regenerative Power Supply User Manual - Manual (Page 107)

This chapter describes contents of error codes and how to correct
problems.
When an error occurs in the 8720MC-RPS Regenerative Power
Supply, an error code corresponding to the error is shown on the
display. The error codes are two- or three-letter codes flashing on
the display.
When an error occurs while the unit stops, the precharge operation
and the PWM switching cannot be started by entering the RUN
sequence signal, and thus, operation cannot be started, until the
error has been reset.
When an error occurs during operation, the PWM switching will
stop, the discharge operation will start and the unit will stop. In
this case, the unit cannot be started until the error has been reset.
For resetting an error, press the RST key or enter the RESET
sequence signal after removing the cause of the error. In either
case, the error cannot be reset when the RUN sequence signal has
been entered.
If multiple errors occurred at a time, the corresponding error codes
will be scrolled flashing one by one.
It is possible to view all the parameters, while an error occurred and
the error code is being displayed. But in such a case, any
parameters except some special ones cannot be changed. To view a
parameter, press the PRG key while an error code is displayed.
Pressing the PRG key will display "U.---", indicating the operation
panel is changed to program mode.
A maximum of ten error codes can be stored in the error log. The
last error that occurred is the first one to appear on the display
when accessing the error log. The last error will be identified with
the highest number (up to 9).
The first error that occurred will appear as the last one in the error
log. The first error will be identified by the number 0.
When viewing the error log, pressing the key or the key will
scroll the error codes.
The error log will be retained even if power to the unit is lost. If
the error log is full, more entries can be added by clearing older
entries. If you desire to clear the error log, press the RST key while
the error log is displayed.
In the course of error processing, an error code (LE *) other than
original errors may be incidentally displayed.
Chapter
8
Error Codes and
Warning Buzzer