• Code: 533
• Description: PSU2 Fan Motor error
  The CPU detects a PSU2 fan lock signal for more than 2 seconds
• Causes: Mechanical overload on the PSU2 fan mechanism. PSU2 fan harness loose or broken
• Remedy: • Remove foreign materials from the PSU2 fan. • Turn the Power Switch Off and On. • Connect the harnesses properly. • Replace the PSU2 fan.

• Code: 534
• Description: AIO Fan Motor error
  The CPU detects an AIO fan lock signal for more than 2 seconds.
• Causes: Mechanical overload on the AIO fan mechanism. AIO fan harness loose or broken
• Remedy: • Remove foreign materials from the AIO fan. • Turn the Power Switch Off and On. • Connect the harnesses properly. • Replace the AIO fan.

• Code: 541
• Description: Fusing thermistor error
  The fusing temperature remains lower than 0C for over 7 seconds after the power relay switches on.
• Causes: Thermistor disconnected. Defective thermistor. Fusing unit connected improperlyor
• Remedy: • Connect the fusing unit properly. • Connect the thermistor. • Replace the thermistor. • This SC cannot be reset by turning the power off and on. • This SP should be reset by a CE. • SP5810-01 can reset this SC.

• Code: 542
• Description: Fusing temperature warm-up error
  1: Thermistor detects that the rate of heat increase is less than 7 degrees per 2 seconds consecutively 5 times. 2: The fusing temperature did not reach the standby temperature within 24 seconds at the center of the hot roller after the main switch turned on. This SC will appear when condition 1 and 2 occur at the same time.
• Causes: Defective thermistor. Thermistor improper installation. Defective fusing lamp
• Remedy: • Install the thermistor properly. • Replace the thermistor. • Replace the fusing lamp. • This SC cannot be reset by turning the power off and on. • This SP should be reset by a CE. • SP5810-01 can reset this SC.

• Code: 543
• Description: Fusing overheat error - software1
  The detected temperature stays at 235°C for 1 second, and this consecutively occurs 10 times.
• Causes: Defective Triac. Defective IOB. Defective engine board
• Remedy: • Replace the Controller board. • This SC cannot be reset by turning the power off and on. • This SP should be reset by a CE. • SP5810-01 can reset this SC.

• Code: 544
• Description: Fusing overheat error - Hard 1
  The thermistor detects over 250 C.
• Causes: Defective Triac. Defective IOB. Defective engine board. Fusing control error
• Remedy: • Replace the Controller board. • This SC cannot be reset by turning the power off and on. • This SP should be reset by a CE. • SP5810-01 can reset this SC.

• Code: 545
• Description: Fusing lamp remains on 1
  The fusing lamps remained ON at full capacity for more than 12 seconds after the fusing temperature attains reload temperature.
• Causes: Fusing thermistor defective. Defective fusing lamp. Thermostat actuation
• Remedy: • Replace the fusing thermistor. • Replace the fusing lamp. • Replace the thermostat. • This SC cannot be reset by turning the power off and on. • This SP should be reset by a CE. • SP5810-01 can reset this SC.

• Code: 547
• Description: Zero cross signal detection error
  Zero cross signal is detected consecutively 4 times (for 200 ms) at power on with fusing relay being off. -or- Zero cross interrupts did not issue at the prescribed 3 second intervals. -or- The detection error occurs twice or more in 10 zero cross signal detections. This error is defined when the detected zero cross signal is less than 45.
• Causes: Defective fusing relay. Defective fusing relay circuit. Shorted +24V fuse on the PSU. Unstable AC power. AC line noise. As for an error due to a high frequency noise interference, this SC will not appear. In this case, SC557 will appear and output the log only.
• Remedy: • Turn the Power Switch Off and On. • Replace the PSU.