• Code: 6610
• Description: Fuser release sensor error When the fuser release motor is driven, the fuser release sensor does not turn on/off for 5 s.
• Remedy: Fuser release motor 1. To check the motor operation, execute U030 Fuser Release. 2. Check that the drive gear can be rotated and the separation is possible. 3. If the motor won’t rotate, confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the Fuser unit.
  Fuser release sensor 1. Check that the sensor is correctly positioned. 2. Check that the sensor is not contaminated or damaged.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6620
• Description: IH core motor error When the IH core motor is driven, the IH core sensor does not turn off for 5 s.
• Remedy: IH core motor 1. To check the motor operation, execute U030 Fuser Release. 2. Check that the drive gear can be rotated and the separation is possible. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. IH core motor and front PWB (YC10) Front PWB (YC3) and engine PWB (YC7) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the Fuser unit.
  IH core sensor 1. Check that the sensor is correctly positioned. 2. Check that the sensor is not contaminated or damaged.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6710
• Description: Fuser IH PWB CPU reset error Watch doc timer has been overflowed.
• Remedy: Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6720
• Description: Fuser IH belt rotation error While driving, the pulse count is less than 3 for 2 seconds during the input to the rotation pulse signal is 200 msec.
• Remedy: Fuser motor 1. To check the motor operation, execute U030 Fuser. 2. Check that the drive gear can rotate and not heavily loaded and, if necessary, apply grease to the axle holder and gears. 3. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser motor and Feed PWB (YC18) and Engine PWB (YC6) 4. If the wiring is disconnected, shorted or grounded, replace the wiring. 5. Replace the fuser motor.
  Fuser belt sensor 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser unit and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the Fuser unit.
  Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB(YC4) and Engine PWB (YC26) 2. Replace the fuser IH PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6730
• Description: Abnormally high fuser IH PWB temperature 1 (IGBT1) The input detect temperature is higher than 115°C/ 221 °F.
• Remedy: Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB ( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6740
• Description: Abnormally high fuser IH PWB temperature 2 (IGBT2) The input detect temperature is higher than 115°C/ 221 °F.
• Remedy: Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB ( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6750
• Description: Fuser IH output over-current error The output current of IH CPU is higher than 110 A for 10 ms in succession.
• Remedy: Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH PWB.
  Fuser IH unit 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH unit and Fuser IH PWB (YC9 and 10) Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH unit.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.

• Code: 6760
• Description: Fuser IH input over-current error The input current of IH CPU is higher than 20A (100V/120V), 10A (200V) for 100 ms in succession.
• Remedy: Fuser IH PWB 1. Confirm that the wiring connector is firmly connected and, if necessary, connect the connector all the way in. Fuser IH PWB( YC4) and Engine PWB (YC26) 2. If the wiring is disconnected, shorted or grounded, replace the wiring. 3. Replace the fuser IH PWB.
  Engine PWB 1. Check the engine software and upgrade to the latest, if necessary. 2. Replace the engine PWB.