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Lexmark CX725

Lexmark CX725

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121 error messages

Error code	Description	Action
121.00	Fuser failed to reach the temperature during warm‑up.	See Fuser temperature error service check.
121.01	There was an attempt to heat fuser, but it was not installed.
121.02	Fuser went over the required temperature during EWC/line voltage detection.
121.03	Fuser hardware and driver mismatch.
121.04	There was an attempt to heat fuser, but fuser relay was open and fuser PIC microcontroller did not report an error or did not respond.
121.05	There was an attempt to heat fuser, but fuser relay was open and fuser PIC microcontroller reported an error.
121.06	Fuser power is at 100% but did not reach the required temperature.
121.08	Fuser did not reach the required temperature while the page is in the fuser.
121.09	Fuser did not reach the required temperature for motors. Note: Not applicable to standby mode.
121.10	Fuser did not reach the required temperature during start of EWC/line voltage detection.
121.11	Fuser reached the required temperature during final EWC/line voltage detection too late.
121.12	Fuser did not reach the required temperature during final EWC/line voltage detection.
121.13	Fuser reached the required temperature during final EWC/line voltage detection too fast.
121.19	Fuser high power trace reached the required temperature during final EWC/line voltage detection too fast.

Error code	Description	Action
121.20	Fuser did not reach the required temperature during steady state control.	See Fuser temperature error service check.
121.21	Fuser low power trace heating rate exceeded error threshold.
121.22	Open fuser relay was detected.
121.23	Fuser reached the required temperature during final EWC/line voltage detection too late.
121.24	Fuser did not reach the required temperature during final EWC/line voltage detection.
121.25	Control did not roll over to steady state control after line voltage detection.
121.26	Fuser did not reach the required temperature during warm up.
121.28	Fuser did not reach the required temperature during EP warm up.
121.31	Fuser too hot.
121.32	Fuser did not reach the required temperature at 100% power.
121.33	Fuser did not reach the required temperature while the page is in the fuser.
121.34	Fuser did not reach the required temperature during steady state control.
121.35	Fuser too warm to power up and execute EWC/line voltage detection after a wrong fuser was installed.
121.36	Open fuser relay was detected in very cold or unknown ambient temperature.
121.37	Fuser heated too fast during final EWC/lline voltage detection.

Error code	Description	Action
121.41	Fuser mechanism did not detect the expected cam sensor signal.	See Fuser temperature error service check.
121.42	Fuser gate time is increasingly out of range.
121.48	Fuser type does not match the fuser driver.
121.50	Fuser went over the required temperature during global over temperature check.
121.51	Fuser secondary heater is too hot.
121.52	Fuser main heater thermistor temperature is out of range.
121.53	Fuser main heater thermistor temperature change rate is out of range.
121.54	Fuser secondary heater thermistor temperature is out of range.
121.55	Fuser secondary heater thermistor temperature change rate is out of range.
121.56	Fuser middle heater thermistor temperature is out of range.
121.57	Fuser middle heater thermistor temperature change rate is out of range.
121.58	Fuser edge thermistor temperature is out of range.
121.59	Fuser edge thermistor temperature change rate is out of range.

Error code	Description	Action
121.60	Contact belt thermistor temperature is out of range.	See Fuser temperature error service check.
121.61	Contact belt thermistor temperature change rate is out of range.
121.62	Non‑contact belt thermistor temperature is out of range.
121.63	Non‑contact belt thermistor temperature change rate is out of range.
121.67	Fuser narrow media backup roll thermistor temperature change rate is out of range.
121.71	Open fuser main heater thermistor was detected.
121.72	Open fuser secondary heater thermistor was detected.
121.73	Open fuser middle heater thermistor was detected.
121.74	Open fuser edge thermistor was detected.
121.76	Open contact belt thermistor was detected.

Error code	Description	Action
121.81	Open fuser backup roll thermistor was detected.	See Fuser temperature error service check.
121.82	Open fuser second backup roll thermistor was detected.
121.83	Open fuser narrow media backup roll thermistor was detected.
121.84	Non‑contact sensor (BUR) is missing.
121.86	Fuser backup roll thermistor temperature is out of range.
121.87	Fuser backup roll thermistor temperature change rate is out of range.
121.88	Fuser second backup roll thermistor temperature is out of range.
121.89	Fuser second backup roll thermistor temperature change rate is out of range.
121.90	Fuser non‑contact backup roll thermistor temperature is out of range.
121.91	Fuser non‑contact backup roll thermistor temperature change rate is out of range.

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