Konica Minolta bizhub C450 Service Manual page 365

16. Malfunction code
Code
C3302 Fusing Cooling Fan Motor/1 or
Fusing Cooling Fan Motor/2
failure to turn
C3451 Heating Roller warm-up failure
C3452 Fusing Pressure Roller warm-up
failure
C3461 New Fusing Unit resetting failure • A new installation is not detected when a new
C3751 Heating Roller abnormally high
temperature
C3752 Fusing Pressure Roller abnor-
mally high temperature
C3851 Heating Roller abnormally low
temperature
C3852 Fusing Pressure Roller
abnormally low temperature
328
Item
• The Fan Lock signal remains HIGH for a predeter-
mined continuous period of time while the Motor
remains stationary.
• The temperature of the Heating Roller does not
reach 100 °C within 50 sec. after the Heating
Roller Heater Lamp has been turned ON.
• The temperature of the Heating Roller does not
reach 100 °C and that of the Fusing Pressure
Roller does not reach 195 °C within 200 sec. after
the Heating Roller Heater Lamp has been turned
ON.
• The voltage of the Heating Roller Thermistor does
not increase by five steps within 20 sec. after the
Heating Roller Heater Lamp has been turned ON.
• No zero cross signal is detected even with the
lapse of 1 sec. or more after the Heating Roller
Heater Lamp has been turned ON.
• The voltage of the Fusing Pressure Roller Ther-
mistor does not increase by five steps within 20
sec. after the predrive of the Fusing Roller has
been started during a warm-up cycle.
Fusing Unit is installed.
• A temperature of 225 °C or more of the Heating
Roller is detected for 1 sec. or more.
• A temperature of 190 °C or more of the Fusing
Pressure Roller is detected for 1 sec. or more
before the start of the heater temperature control.
• A temperature of 215 °C or more of the Fusing
Pressure Roller is detected for 1 sec. or more
after the start of the heater temperature control.
• No zero cross signal is detected even with the
lapse of 1 sec. or more during a standby state,
print cycle, or Power Save.
• A temperature of 120 °C or less of the Heating
Roller is detected for 1 sec. or more during a
standby state.
• A temperature of 120 °C or less of the Heating
Roller is detected for 1 sec. or more during a print
cycle.
• A temperature of 70 °C or less of the Heating
Roller is detected for 1 sec. or more during Power
Save.
• . A temperature of 80 °C or less of the Fusing
Pressure Roller is detected for 1 sec. or more dur-
ing a standby state.
• A temperature of 80 °C or less of the Fusing Pres-
sure Roller is detected for 1 sec. or more during a
print cycle.
• A temperature of 80 °C or less of the Fusing Pres-
sure Roller is detected for 1 sec. or more during
Power Save.
Field Service Ver. 1.0 Mar. 2005
Description Rank
B
A
A
B
A
A
A
A