Causes: The machine does not detect a main motor lock signal within 2sec after the main motor started to rotate. -or- The machine does not release a main motor lock signal within 2sec after the main motor switched off. -or- The machine detects a main motor lock signal every 100ms for seven times consecutively, after the main motor started to rotate stably.
Remedy: • Overload of • Torque load overload • Defective main motor • Disconnect or defective motor harness 1. Turn the machine's main power off, and then on. 2. Check or replace the main motor if the torque load is normal. 3. Replace the motor harness.
Code: 530
Description: Exhaust fun Error
Causes: The FAN lock signal – High for 10 seconds, after the fan motor started to rotate.
Remedy: • Disconnected or defective motor harness. 1. Turn the machine's main power off, and then on.
Code: 541
Description: Fuser thermistor error
Causes: The thermistor output is less than 0°C for 5 seconds after the fusing lamp turns ON.
Remedy: • Disconnected or defective thermistor • Disconnected or defective fusing lamp 1. Check the harness connection of the thermistor. 2. Replace the fusing unit. • Execute "Fuser SC Reset" to recover the machine after completing the recovery procedure. Otherwise, the machine continues to issue this SC code and cannot be operated.
Code: 542
Description: Fuser reload error
Causes: This SC is issued if one of following conditions occurs: The fusing temperature rises 8°C or less in 1.5 seconds; and this continues 5 times consecutively. -or- The fusing temperature has not reached 45°C within 9 seconds (after the fusing lamp comes ON while the machine is warming-up). -or- The fusing unit does not attain reload temperature within 35 s. (normal temperature) or 65 s (lower temperature – the thermistor output is less than 18°C) after the fusing temperature control starts.
Remedy: • Defective or deformed thermistor • Incorrect power supply input at the main power socket 1. Defective fusing lamp
Code: 543
Description: High temperature error (Soft)
Causes: • The detected temperature stays at 235°C for 1 second, and this consecutively occurs 10 times.
Remedy: • Defective Main board • Defective PSU 1. Replace the Main board 2. Replace the PSU • Execute "Fuser SC Reset" to recover the machine after completing the recovery procedure. Otherwise, the machine continues to issue this SC code and cannot be operated.
Code: 544
Description: High temperature error (hard)
Causes: • During stand-by mode or a print job, the detected heating roller temperature reaches 250°C.
Remedy: • Defective Main board • Defective PSU 1. Replace the Main board 2. Replace the PSU • Execute "Fuser SC Reset" to recover the machine after completing the recovery procedure. Otherwise, the machine continues to issue this SC code and cannot be operated.