Error code Description Action
121.10 Fuser did not reach the required temperature
(during start of EWC/line voltage detection).
See
“Fuser temperature error service check”
on page 307.
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.
121.20 Fuser high power trace heating rate went over the
limit.
See
“Fuser temperature error service check”
on page 307.
121.21
Fuser low power trace heating rate (from 165
o
C to
180
o
C) went over the limit.
121.22 Open fuser relay was detected.
121.28 Fuser did not reach the required temperature
(during EP warm‑up).
121.30 Fuser did not reach the required temperature even
if it has been on for a long time.
See
“Fuser temperature error service check”
on page 307.
121.32 Fuser did not reach the required temperature (on
100% power).
121.33 Fuser did not reach the required temperature
(while page is in the fuser).
121.34 Fuser did not reach the required temperature
(during steady state control).
121.36 Open fuser relay was detected with very cold or
unknown ambient temperature.
121.50 Fuser went over the required temperature (during
global overtemp check).
See
“Fuser temperature error service check”
on page 307.
121.51 Fuser went over the required temperature (at the
secondary heater).
121.52 Main thermistor temperature is out of range.
121.53 Main thermistor temperature change rate is out of
range.
121.58 Edge thermistor temperature is out of range.
121.59 Edge thermistor temperature change rate is out of
range.
4064
Diagnostics and troubleshooting
305
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