Lexmark W850n Service Manual page 35

Error code or
Error contents
message
920.00 Fuser unit assembly on time
failure
Service fuser
error
921.00 Over heat temperature failure
Service fuser
error
922.00 Center thermistor failure
Service fuser
error
923.00 Rear thermistor failure
Service fuser
error
924.00 Pressure roll thermistor
failure
Service fuser
error
925.00 Fuser operating temperature
failure.
Service fuser
error
927.00 PC cartridge RFID data write
failure
Service PC
cartridge
928.00 PC cartridge RFID
communication failure
Service PC
cartridge
Description/Action
During the warm-up period, the control thermistor
does not detect the ready temperature even when
the specified time is passed after the main lamp is
turned on.
During the standby period, the control thermistor
does not detect the specified temperature even
when the specified time is passed after the main
lamp is on.
During the standby period, the control thermistor
does not detect the specified temperature even
when the specified time is passed after the sub lamp
in on.
During idling, after power-on, the control thermistor
does not detect the idling stop temperature even
after the specified time is passed.
During print, the control thermistor does not detect
the specified temperature even when the specified
time is passed after the main lamp is turned on.
During print, the control thermistor does not detect
the specified temperature even when the specified
time is passed after the sub lamp is turned on.
Go to "920.00 Fuser unit assembly on time
failure" on page 2-51.
The control thermistor detects a temperature higher
than the specified value.
The lamp change thermistor detects a temperature
higher than the specified value.
Go to "921.00 Over heat temperature failure" on
page 2-51.
The center thermistor has failed.
Go to "922.00 Center thermistor failure" on
page 2-52.
The rear thermistor has failed.
Go to "923.00 Rear thermistor failure" on
page 2-52.
The pressure roll thermistor has failed.
Go to "924.00 Pressure roll thermistor failure" on
page 2-53.
Fuser temperature is not high enough during
printing.
Go to "925.00 Fuser operating temperature
failure" on page 2-53.
A data write error occurred on the PC cartridge
RFID tag in the PC cartridge.
Go to "927.00 PC cartridge RFID data write
failure" on page 2-54.
A communication error occurred between the PC
cartridge RFID tag in the PC cartridge and the RFID
ASIC on the printer engine card assembly.
Go to "928.00 PC cartridge RFID communication
failure" on page 2-54.
4024-110
2-15
Diagnostic information