Recoverable Errors; Unrecoverable Errors - Epson TM-T20III Technical Reference Manual

Recoverable Errors

The printer cannot print when a recoverable error occurs. When the roll paper cover is closed, the power is
turned off and on again, or an error recovery command is received, the printer can recover from the error.
Error
Autocutter error Autocutter does not work
correctly
The error recovery command is valid only if a recoverable error (excluding automatically
recoverable errors) occurs.
Use the TM-T20III Utility to change the condition for recovery. For details, see the TM-T20III Utility
User's Manual.

Unrecoverable Errors

The printer cannot print when an unrecoverable error occurs. If the error persists after turning the printer off
and then on again, the printer may be defective. Contact qualified service personnel.
Turn off the power immediately when an unrecoverable error occurs.
CAUTION
Error
R/W error in memory
High voltage error
Low voltage error
CPU execution error
Internal circuit connection
error
Error description
Error description
After R/W checking, the printer does not
work correctly.
The power supply voltage is extremely
high.
The power supply voltage is extremely low.
The CPU is executing an incorrect address.
Internal circuits are not connected
correctly.
Chapter 1 Product Overview
Error LED status Condition for Recovery
ON Recovers from the error when
the jammed paper or foreign
matter is removed, and the roll
paper cover is closed
Error LED flash code
LED ON
LED OFF
Approx. 320 ms
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