121 errors
121 error messages
Error code Description Action
121.xx Fuser error Go to
“Fuser service check” on page 86.
121.01 Attempting to print with estimated power at or
below minimum power.
121.02 Fuser is over temperature.
121.03 Fuser open thermistor check failed.
121.04 Attempting to print with estimated power at or
above minimum power.
121.05 Fuser failed to reach final temperature in time.
121.06 Attempting to print when the estimated power is
too low.
121.07 Timed out waiting for home sensor event
121.08 Wrong lamp bit is set in NVRAM.
121.10 Fuser failed to warm up.
121.11 Fuser under temperature error while in standby. Go to
“Fuser service check” on page 86.
121.12 Fuser under temperature error while printing.
121.13 Fuser open thermistor check failed for second
thermistor.
121.14 Fuser shorted thermistor check failed for hot roll
thermistor.
121.15 Fuser shorted thermistor check failed for second
thermistor.
121.16 Estimated power is at or above the maximum
power.
121.17 Total failure to close fuser nip.
121.26 Attempting to print with estimated power at or
below minimum power.
121.27 Fuser over temperature.
121.28 Fuser open thermistor check failed.
5027
Diagnostic information
84
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