Epson C31CJ52121 Technical Reference Manual page 23

Unrecoverable Errors
The printer cannot print when an unrecoverable error occurs. Turn the printer off and then back on. If the error
still occurs, the printer may be defective. Contact qualified service personnel.
Error (Error code)
High voltage error (AKA41)
Low voltage error (AKA42)
Unrecoverable error (A9999)
Abnormal power supply voltage (high voltage) was detected.
Abnormal power supply voltage (low voltage) was detected.
Other unrecoverable error is detected.
Chapter 1 Product Overview
Description
23