• Code: 546-1
• Description: Fusing Temperature Error 1
  Fusing temperature goes up and down quickly, more than 20°C (68°C) at 1 sec. intervals.
• Causes: • Check the thermistor connection. • Check the fusing lamp connections. • Replace the MCU.

• Code: 546-2
• Description: Fusing Temperature Error 2
  Temperature goes up and down during a long interval, by 20°C (68°C) more than 3 times during a 60 sec. interval.
• Causes: • Check the thermistor connection. • Check the fusing lamp connections. • Replace the MCU.

• Code: 547
• Description: Zero-Cross Signal Errors
  The zero-cross signal from the ac power supply makes a trigger pulse to control the supply of power. It automatically detects 50/60 Hz.
• Causes: • Check that the frequency of the power supply to the machine is correct. • Replace the PSU. • Replace the MCU

• Code: 548
• Description: Fusing Lamps Disconnected
  The fusing temperature did not get to 100°C within 2 min. after the machine was switched on.
• Causes: • Check the fusing lamp harness connections. • Replace the fusing lamps. • Replace the AC drive board.

• Code: 549-1
• Description: Pressure Roller Thermistor Error 1
  Fusing temperature control detected that the analog voltage output by the pressure roller thermistor was more than 5V. The pressure roller thermistor is disconnected.
• Causes: • Check the thermistor connection. • Replace the thermistor. • Replace the MCU.

• Code: 549-2
• Description: Pressure Roller Thermistor Error 2
  (2 times at 1.5 sec. intervals) that the analog voltage output by the pressure roller thermistor was less than 0.2 V. The pressure roller thermistor has short-circuited.
• Causes: • Check the thermistor connection. • Replace the thermistor. • Replace the MCU.

• Code: 601
• Description: Communication Error Between IPU and CIS
  A break signal was detected after the communication connection. A communication error was sent back 3 times.
• Causes: • Update the software. • Replace the MCU.

• Code: 605
• Description: Communication Error Between Controller and ECU
  One of these problems occurred: • Serial communication error • Serial data overflowed in the receive data buffer.
• Causes: • Replace the MCU.