• Code: 6000
• Description: Broken fuser heater wire (main) During warm-up, the temperature detected by the thermopile does not reach 100°C/212.0 °F when turning the heater on for consecutive 10s. During warm up, the temperature detected by the thermopile does not reach the ready temperature when passing 30s after reaching 60°C/ 212°F.
• 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. 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: 6020
• Description: Fuser thermopile high temperature error (main) During drive, the thermopile detected 200°C/392 °F for 5s The temperature detected by the thermopile rose 18°C/65 °F or more when passing 1s or more after the drive is stopped Detected temperature at that time is 200°C/392 °or more
• 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. 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. 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: 6030
• Description: Broken fuser thermopile wire (main) The thermopile detected an abnormal value
• 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
  Main/Engine PWB Replace the main/engine PWB.

• Code: 6050
• Description: Fuser thermopile low temperature error (main) During printing, the temperature detected by the thermopile is less than 100°C/212°F for consecutive 3s
• Remedy: Power supply voltage 1. Check no voltage drop exceeding 10% of the rated during printing. 2. If the power is overloaded, change the AC outlet that supplies power.
  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. 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: 6200
• Description: Fuser heater error (sub) During warm-up, the temperature detected by the thermistor does not reach 60°C/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 60°C/ 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.