Description: 3rd paper tray lift motor malfunction (optional paper feed unit) The paper lift sensor did not activate within 18 sec. after the tray lift motor switched on.
Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload. • Paper lift sensor connection loose, disconnected, or damaged • Paper lift sensor defective • Tray lift motor connection loose, disconnected, or damaged • Tray lift motor defective
Remedy: 1. Check or replace the harness. 2. Replace the tray lift motor. 3. Replace the BCU.
Code: 504
Description: 4th paper tray lift motor malfunction (optional paper feed unit) The paper lift sensor did not activate within 18 sec. after the tray lift motor switched on.
Causes: • An obstruction (jammed paper, paper scraps, etc.) has blocked the motor drive and caused an overload. • Paper lift sensor connection loose, disconnected, or damaged • Paper lift sensor defective • Tray lift motor connection loose, disconnected, or damaged • Tray lift motor defective
Remedy: 1. Check or replace the harness. 2. Replace the tray lift motor. 3. Replace the BCU.
Code: 520
Description: 2nd paper tray cooling fan error (optional paper feed unit) The motor lock signal error from the cooling fan is detected for 10 seconds after turning on the cooling fan.
Causes: • Disconnected harness of the cooling fan • Defective cooling fan • Defective BCU
Remedy: 1. Check or replace the harness of the cooling fan. 2. Replace the cooling fan. 3. Replace the BCU.
Code: 521
Description: 3rd paper tray cooling fan error (optional paper feed unit) The motor lock signal error from the cooling fan is detected for 10 seconds after turning on the cooling fan.
Causes: • Disconnected harness of the cooling fan • Defective cooling fan • Defective BCU
Remedy: 1. Check or replace the harness of the cooling fan. 2. Replace the cooling fan. 3. Replace the BCU.
Code: 522
Description: 4th paper tray cooling fan error (optional paper feed unit) The motor lock signal error from the cooling fan is detected for 10 seconds after turning on the cooling fan.
Causes: • Disconnected harness of the cooling fan • Defective cooling fan • Defective BCU
Remedy: 1. Check or replace the harness of the cooling fan. 2. Replace the cooling fan. 3. Replace the BCU.
Code: 530
Description: Development fan 1 error The motor lock signal error is detected for 10 seconds after the motor lock signal was first detected.
Causes: • Defective development fan 1 or development fan 2 • Disconnected or defective harness • Defective BCU
Remedy: 1. Check or replace the harness. 2. Replace the development fan 1 (SC530) or development fan 2 (SC531). 3. Replace the BCU.