Error Codes - Allen-Bradley 8720MC-RPS065 User Manual

Chapter 8 Troubleshoot the 8720MC-RPS Unit

Error Codes

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When an error occurs while the unit is stopped, 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 code is reset.
When an error occurs during operation, the PWM switching stops, the
discharge operation starts, and the unit stops. Once again, the unit cannot be
started until the error code is reset.
To reset an error code, remove the RUN signal and press RST or enter the
RESET sequence signal after removing the cause of the error.
If multiple errors occurred at a time, the corresponding error codes scroll
flashing one after another.
It is possible to view all the parameters while an error is present and the error
code is being displayed. However, before changing any parameter, errors must
be reset. To view a parameter, press PRG while an error code is displayed.
Pressing PRG displays 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 code is identified by the highest number (up to 9).
The first error that occurred appears as the last one in the error log. The first
error code is identified by the number 0.
When viewing the error log, press
The error log is 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 RST while the error log is displayed.
The error codes are shown in the following tables.
Table 29 - Troubleshooting Tables
Error Code Descriptions
Common to all units regardless of single unit connection or parallel connection of multiple units.
Caused by leader unit regardless of single unit connection or parallel connection of multiple units.
Caused by follower unit 1 (follower unit connected adjacent to the leader unit) in the case of parallel
connection of multiple units.
Caused by follower unit 2 (follower unit connected adjacent to the follower unit 1) in the case of parallel
connection of multiple units.
To reset error codes, first remove the causes of the errors and then press RST or
enter the RESET sequence signal. In either case, resetting cannot be performed
when the RUN sequence signal has been entered.
Rockwell Automation Publication 8720MC-RM001K-EN-P - September 2018
or to scroll through the error codes.
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