My 18R2 shows ER4 after doing a firmware upgrade, what do I do?

This usually occurs when a firmware upgrade is applied to a 18R2 Controller that has a script loaded or the USB drive still has the .s19 file on it.

To resolve the error, clear the script from the 18R2 Controller by pressing and holding TEST and SYNC simultaneously for 10 seconds. (Both the TEST and SYNC buttons will blink, and 00 will show on the top 7-segment display when the scripts have cleared.)

Then restart the 18R2 Controller.

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