• Code: 533
• Description: Paper exit cooling fan motor error The machine does not detect the fan motor lock signal for 10 seconds after turning on the paper exit cooling fan motor.
• Causes: • Defective paper exit cooling fan motor or connector disconnection. • Defective IOB • Disconnected harness
• Remedy:

• Code: 540
• Description: Fusing motor error The IOB does not receive the lock signal for 2 seconds after turning on the fusing motor.
• Causes: • Motor overload • Defective fusing motor or connector disconnection. • Defective IOB • Disconnected harness
• Remedy:

• Code: 541
• Description: Fusing thermistor open (center) The thermistor (center) detects 0°C or less for 16 sec. in a row.
• Causes: • Fusing thermistor disconnected • Fusing thermistor connector defective
• Remedy:

• Code: 542
• Description: Fusing temperature warm-up error(center) This SC is generated if the following condition occurs: • The thermistor (center) does not detect an 8°C increment in the fusing temperature for 1.5 sec. just after the fusing temperature reached 45°C. • The temperature of the center thermistor does not reach 60°C for 7 seconds after the fusing lamps turned on. • The temperature of the center thermistor does not reach the target temperature for 26 seconds after the fusing lamps turned on.
• Causes: • Thermistor warped or broken • Input voltage is unwarranted
• Remedy:

• Code: 543
• Description: Fusing overheat error 1 (software detection) A fusing temperature (at the center) of over 230°C (446°F) is detected for 1 second by the fusing thermistors at the center or at either end of the fusing roller.
• Causes: • Power supply unit defective • I/O board (IOB) defective • BCU defective • TRIAC short on PSU (PSU defective)
• Remedy:

• Code: 544
• Description: Fusing overheat error 1 (hardware detection) A fusing temperature (at the center) over 250°C is detected by the fusing temperature monitor circuit in the BCU board.
• Causes: • I/O board (IOB) defective • BCU defective • TRIAC short on bridge board (bridge board defective)
• Remedy:

• Code: 545
• Description: Fusing lamp consecutive full power 1 After warm-up the fusing lamp remains at full power for 10 seconds without the hot roller rotating.
• Causes: • Thermistors (center) warped • Disconnected or defective thermistors (center) • Defective fusing lamp
• Remedy:

• Code: 547
• Description: Zero cross error • The zero cross signal is detected three times even though the heater relay is off when turning on the main power. • The zero cross signal is not detected for 2 seconds even though the heater relay is on after turning on the main power or closing the front door. • The detection error occurs twice or more in the 11 zero cross signal detections. This error is defined when the detected zero cross signal is less than 45.
• Causes: • Defective fusing lamp relay • Defective fusing lamp relay circuit • Unstable power supply
• Remedy: