SERVICE CALL CONDITIONS April 2007 4-52
Heating roller thermistor 2 error 2: Failed to reach warmup temperature
SC548 A
After the main switch is turned ON or
the cover is closed, the heating roller
temperature does not reach the ready
temperature within 2 sec. after the
heater switches ON.
-or-
If the roller was below 45°C, the
heating roller did not reach the ready
temperature 2 sec. after reaching
45°C.
Note: Thermistor 2 stops monitoring
the temperature once Thermistor 1
detects warmup temperature.
• Thermistor is bent, installed
incorrectly
• Defective heating roller thermistor
• Heating roller fusing lamp broken
• Defective BICU
Do SP5810 to cancel the SC fusing code.
Heating roller thermistor 2 error 3: Software - High Temperature SC549 A
The thermistor detected a
temperature over 250°C. • TRIAC short
• IOB defective
• BICU defective
• Fusing temperature control is erratic
Do SP5810 to cancel the SC fusing code.
Heating roller thermistor 2 error 4: Hardware - High Temperature SC550 A
The thermistor detected a
temperature over 260°C. • TRIAC short
• IOB defective
• BICU defective
• Fusing temperature control is erratic
Do SP5810 to cancel the SC fusing code.
Pressure roller thermistor error 1 SC551 A
The temperature measured by the pressure
roller thermistor does not reach 0°C for 200
sec.
• Loose connection of the
pressure roller thermistor
• Defective pressure roller
thermistor
• Defective BICU
Do SP5810 to cancel the SC fusing code.
Pressure roller thermistor error 2 SC552 A
After the main switch is turned ON or the
cover is closed, the heating roller
temperature does not reach the ready
temperature within 2 sec. after the heater
switches ON.
-or-
If the roller was below 45°C, the heating
roller did not reach the ready temperature 2
sec. after reaching 45°C.
Note: Thermistor 2 stops monitoring the
temperature once Thermistor 1 detects
ready temperature.
• Pressure roller thermistor
harness loose, disconnected,
defective
• Pressure roller thermistor
defective