• Code: E804-0001
• Description: The rotation of the following is faulty: power supply cooling fan 1, power supply cooling fan 2, controller cooling fan.
  The fan stop signal has been detected for 5 sec or more after the power supply cooling fan 1 has gone on.
• Remedy: Disconnect and then connect J505 of the DC controller PCB. Replace the power supply cooling fan 1. Replace the DC controller PCB.

• Code: E804-0002
• Description: The rotation of the following is faulty: power supply cooling fan 1, power supply cooling fan 2, controller cooling fan.
  The fan stop signal has been detected for 5 sec or more after the power supply cooling fan 2 has gone on.
• Remedy: Disconnect and then connect J505 of the DC controller PCB. Replace the power supply cooling fan 2. Replace the DC controller PCB.

• Code: E804-0004
• Description: The rotation of the following is faulty: power supply cooling fan 1, power supply cooling fan 2, controller cooling fan.
  The fan stop signal of the controller cooling fan has been detected continuously for 16 sec.
• Remedy: Disconnect and then connect J1028 of the main controller PCB. Replace the controller cooling fan. Replace the main controller PCB.

• Code: E805-0002
• Description: The fixing heat discharge fan rotation is faulty.
  The fan stop signal has been detected for 5 sec or more after the fixing heat discharge fan has gone on.
• Remedy: Disconnect and then connect J503 of the DC controller PCB. Replace the fixing heat discharge fan. Replace the DC controller PCB.

• Code: E820-0000
• Description: The drum fan rotation is faulty.
  The fan stop signal has been detected for 5 sec or more after the drum fan has gone on.
• Remedy: Disconnect and then connect J512 of the DC controller PCB. Replace the drum fan. Replace the DC controller PCB.

• Code: E823-0000
• Description: The pre-transfer charging assembly fan rotation is faulty.
  The fan stop signal has been detected for 5 sec or more after the pre-transfer charging assembly fan has gone on.ulty.
• Remedy: Disconnect and then connect J504 of the DC controller PCB. Replace the pre-transfer charging assembly fan. Replace the DC controller PCB.

• Code: E840-0000
• Description: An HP detection error has occurred in relation to the fixing inlet sensor (fixing wrap jam detection).
  The home position is not detected when he sensor is moved up/down (i.e., the sensor has not gone on).
• Remedy: Disconnect and then connect J508, J552, and J553 of the DC controller PCB. Disconnect and then connect J4001 and J4002 of the fixing inlet sensor ascent/descent motor driver PCB; as necessary, replace the fixing inlet sensor ascent/ descent motor. Replace the fixing inlet sensor ascent/descent motor driver PCB.

• Code: E840-0001
• Description: An HP detection error has occurred in relation to the fixing inlet sensor (fixing wrap jam detection).
  The home position is not detected when the sensor is moved up/down (i.e., the sensor has not gone off).
• Remedy: Disconnect and then connect J508, J552, and J553 of the DC controller PCB. Disconnect and then connect J4001 and J4002 of the fixing inlet sensor ascent/descent motor driver PCB; as necessary, replace the fixing inlet sensor ascent/ descent motor. Replace the fixing inlet sensor ascent/descent motor driver PCB.