• Code: 6200
• Description: Fuser heater error (sub) During warm-up, the temperature detected by the thermistor does not reach 60C/212.0 °F when turning the heater on for consecutive 30s. During warm-up, the temperature detected by the thermistor does not reach the ready temperature when passing 20s after it reaches 60C/ 212°F.
• Remedy: Thermopile 1. Reconnect the wire connector Replace the wire if there is no continuity. Thermopile - Main/engine PWB (YC2) 2. Replace the thermopile if not repaired
  Fuser unit 1. Make sure there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit - Main/Engine PWB(YC19) 3. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 4. If the fuser heater is not turned on (broken thermostat wire), replace the fuser unit.
  Low voltage power supply PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Heater - Low voltage power supply PWB (YC102) Low voltage power supply PWB - Main/ Engine PWB(YC20) 2. Replace the low voltage power supply PWB.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6220
• Description: Fuser heater high temperature error (sub) The temperature detected by the thermopile is 240°C/464 °F while the drive is stopped The temperature detected by the thermopile is 255°C/491 °F during drive
• Remedy: Thermopile 1. Reconnect the wire connector Replace the wire if there is no continuity. Thermopile - Main/engine PWB (YC2) 2. Check how the thermopile is attached. If not attached to the holder, correct it 3. Replace the thermopile if not repaired
  Fuser unit 1. Make sure there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit - Main/Engine PWB(YC19) 3. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 4. Replace the fuser unit.
  Low voltage power supply PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Low voltage power supply PWB - Main/ Engine PWB(YC20) 2. Replace the low voltage power supply PWB.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6230
• Description: Fuser thermistor wire break (sub) The thermistor's AD value was abnormal
• Remedy: Fuser unit 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit - Main/Engine PWB(YC19) 2. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 3. If the fuser heater is not turned on (broken thermostat wire), replace the fuser unit.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6250
• Description: Fuser heater low temperature error (sub) During printing, the temperature detected by the thermistor is less than 60°C/140°F for consecutive 3s
• Remedy: Thermopile 1. Reconnect the wire connector Replace the wire if there is no continuity. Thermopile - Main/engine PWB (YC2) 2. Check how the thermopile is attached. If not attached to the holder, correct it 3. Replace the thermopile if not repaired
  Fuser unit 1. Make sure there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit - Main/Engine PWB(YC19) 3. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 4. Replace the fuser unit.
  Low voltage power supply PWB 1. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Heater - Low voltage power supply PWB (YC102) Low voltage power supply PWB - Main/ Engine PWB(YC20) 2. Replace the low voltage power supply PWB.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6400
• Description: Zero-cross signal error During the heater turned on, the zero-cross signal disappears for consecutive 1s
• Remedy: Low voltage power supply PWB Replace the low voltage power supply PWB.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6600
• Description: Fuser rotation error The fuser roller rotation detection is not input for consecutive 2s while the motor's steady signal is input
• Remedy: Fuser unit 1. Make sure there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit - Main/Engine PWB(YC19) 3. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 4. Replace the fuser unit.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6610
• Description: The fuser pressure release error The fuser pressure change is not complete within 10s after the instruction
• Remedy: Fuser unit 1. Make sure there is no paper jam. 2. Confirm that the wiring connector is firmly connected, and if necessary, connect the connector all the way in. Fuser unit - Main/engine PWB (YC19) 3. If the wiring is disconnected, shortcircuited or has a ground fault, replace the wire. 4. Replace the fuser unit.
  Fuser pressure release error 1. Reverse-rotate the fuser gear manually to check if the fuser pressure can be released. 2. When releasing the pressure, check the fuser pressure release sensor is interrupted by the actuator Reattach it if the light is not interrupted 3. Reconnect the wire connector Replace the wire if there is no continuity. Fuser pressure release sensor - Main/ engine PWB (YC19) Fuser pressure release motor - Main/ engine PWB (YC1) 4. Replace the fuser pressure release motor.
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6650
• Description: Fuser thermopile EEPROM error 1. The thermopile EEPROM is not accessed 2. No response from the device at read was detected five time consecutively Data read at two points was unmatched eight times consecutively 3. Thermopile data checksum error
• Remedy: Thermopile 1. Reconnect the wire connector Replace the wire if there is no continuity. 2. Thermopile - Main/engine PWB (YC2) 3. Replace the thermopile if not repaired
  Main/Engine PWB Replace the main/engine PWB.