Recoverable Errors; Errors That Are Impossible To Recover - Epson U220B - TM Two-color Dot-matrix Printer Technical Reference Manual

4.1.1.2 Recoverable Errors

When a recoverable error occurs, after the cause of the error is removed, the printer
can recover from the error by receiving an error recovery command without turning off
the power:
ERROR
Paper roll cover open
error (*1)
Autocutter error
(Type A, B only)
Home position
detection error
(This is "Mechanical
error")
Note:
(*1) These conditions are selected by MSW 8-5 and 8-8. When MSW 8-5 (mapping of the cover open
status) is OFF, the error does not occur and a "paper end error" occurs instead. If MSW 8-8 is ON, this
error is handled as a recoverable error.

4.1.1.3 Errors that are impossible to recover:

ERROR
R/W error in memory
or gate array
High voltage error
Low voltage error
CPU execution error
Print head
temperature
detection circuit error
4-2 Troubleshooting
Description
The roll paper cover is
opend when printing.
The autocutter does not
work correctly
The home position cannot
be detected due to a
paper jam
Description
After R/W checking, the
printer does not work
correctly.
Writing to, reading out, or
erasing the NV memory for
image scanning results
does not work correctly.
The power supply voltage
is extremely high
The power supply voltage
is extremely low
The CPU executes an
incorrect address or I/F
board is not connected
There is an abnormality in
the print head
temperature
ERROR LED Blinking Pattern
160 ms
ERROR LED Blinking Pattern
160 ms
Recovery
Recovers by error recovery
command with the cover
closed
Recovers by error recovery
command. (See "Autocutter
Jam" (page 4-3))
Recovers by error recovery
command
Recovery
Impossible to recover
Impossible to recover
Impossible to recover
Impossible to recover
Impossible to recover
Rev. D