2-20
Confidential
The side thermistor of the fuser unit detected a 
temperature higher than the specified value.
7500 2-38
Ready state under a low temperature environment.
--
The front cover sensor detected that the front cover 
was open.
A100 2-49
The eject sensor detected that the fuser cover was 
open.
5600 2-33
The back cover sensor detected that the cover was 
open in duplex printing mode.
0F00 2-29
The toner sensor detected that the toner cartridge 
was not set. 4400 2-31
The toner sensor detected no toner remaining or the 
number of rotations of the developer roller has 
reached the upper limit.
6300 2-36
The new toner sensor could not detect the new 
toner cartridge correctly.
C000 2-49
Detected discharge when the number of rotations of 
the drum has exceeded twice the life limit.
8300 2-40
LED Type of problem
Error 
codes
Refer 
to: