• Code: 6030
• Description: Upper fuser thermistor broken detection
  • No temperature detection output is obtained from the upper fuser thermistor.
• Causes: Defective engine controller PWB (KP-801). Defective fuser PWB (KP-811). Defective upper fuser thermistor, or improper fitting.. Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (upper fuser thermistor), or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective fuser PWB (KP-811). Replace the fuser unit (fuser PWB [KP- 811]).
  Defective upper fuser thermistor, or improper fitting. Replace the fuser unit (upper fuser thermistor).
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (upper fuser thermistor), or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6040
• Description: Upper fuser thermistor abnormal temperature detection
  • The temperature detection output from the upper fuser thermistor is abnormal change.
• Causes: Defective engine controller PWB (KP-801). Defective fuser PWB (KP-811). Defective upper fuser thermistor, or fitting is not proper. Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (upper fuser thermistor), or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective fuser PWB (KP-811). Replace the fuser unit (fuser PWB [KP- 811]).
  Defective upper fuser thermistor, or fitting is not proper. Replace the fuser unit (upper fuser thermistor).
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (upper fuser thermistor), or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6100
• Description: Press/heat roller heating time-out 1
  • The temperature on the press/heat roller does not rise within the predetermined period when ASIC (U8) on the engine controller PWB (KP-801) has turned on the lower heater lamp. This is detected when the lower heater lamp is turned on.
• Causes: Defective engine controller PWB (KP-801). Defective lower heater lamp. Defective lower thermostat. Defective fuser PWB (KP-811). Defective lower fuser thermistor, or fitting is not proper. Defective power supply unit. Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective lower heater lamp. Replace the fuser unit (lower heater lamp).
  Defective lower thermostat. Replace the fuser unit (lower thermostat).
  Defective fuser PWB (KP-811). Replace the fuser unit (fuser PWB [KP- 811]).
  Defective lower fuser thermistor, or fitting is not proper. Replace the fuser unit (lower fuser thermistor).
  Defective power supply unit. Replace the power supply unit.
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit, or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6110
• Description: Press/heat roller heating time-out 2 • The temperature on the press/heat toller does not reach the correct temperature within the predetermined period after self-diagnostic code 6100 is cleared. The period for detection is longer than the condition for selfdiagnostics code 6100.
• Causes: Defective engine controller PWB (KP-801). Defective lower heater lamp. Defective lower thermostat. Defective fuser PWB (KP-811). Defective lower fuser thermistor, or fitting is not proper. Defective AC power source (Abnormal low voltage). Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective lower heater lamp. Replace the fuser unit (lower heater lamp).
  Defective lower thermostat. Replace the fuser unit (lower thermostat).
  Defective fuser PWB (KP-811). Replace the fuser unit (fuser PWB [KP- 811]).
  Defective lower fuser thermistor, or fitting is not proper. Replace the fuser unit (upper fuser thermistor).
  Defective AC power source (Abnormal low voltage). Connect to the proper AC power source.
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit, or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6120
• Description: Press/heat roller abnormal high temperature
  • The temperature on the press/heat roller has risen up to the predetermined abnormal temperature.
• Causes: Defective engine controller PWB (KP-801). Defective lower heater lamp. Defective fuser PWB (KP-811). Defective lower fuser thermistor. Defective power supply unit. Defective AC power source (Abnormal high voltage). Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit, or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective lower heater lamp. Replace the fuser unit (lower heater lamp).
  Defective fuser PWB (KP-811). Replace the fuser unit (lower thermostat).
  Defective lower fuser thermistor. Replace the lower fuser thermistor.
  Defective power supply unit. Replace the power supply unit.
  Defective AC power source (Abnormal high voltage). Connect to the proper AC power source.
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit, or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6130
• Description: Lower fuser thermistor broken detection
  • The temperature detection is not obtained from the lower fuser thermistor.
• Causes: Defective engine controller PWB (KP-801). Defective fuser PWB (KP-811). Defective lower fuser thermistor, or improper fitting. Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (lower fuser thermistor), or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective fuser PWB (KP-811). Replace the fuser unit (fuser PWB [KP- 811]).
  Defective lower fuser thermistor, or improper fitting. Replace the fuser unit (lower fuser thermistor).
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (lower fuser thermistor), or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6140
• Description: Lower fuser thermistor abnormal temperature detection
  • The temperature detection output from the lower fuser thermistor is out of the normal range.
• Causes: Defective engine controller PWB (KP-801). Defective fuser PWB (KP-811). Defective lower fuser thermistor, or fitting is not proper. Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (lower fuser thermistor), or poor contact of the connector terminals.
• Remedy: Defective engine controller PWB (KP-801). Replace the engine controller PWB (KP- 801).
  Defective fuser PWB (KP-811). Replace the fuser unit (fuser PWB [KP- 811]).
  Defective lower fuser thermistor, or fitting is not proper. Replace the fuser unit (lower fuser thermistor).
  Defective harness (S02572) between engine controller PWB (KP-801) and fuser unit (lower fuser thermistor), or poor contact of the connector terminals. Check the continuity of the harness (S02572). Check the insertion of connectors.

• Code: 6430
• Description: Oil roller unit fuse break error
  • The engine controller PWB (KP-801) is not able to cut the fuse on the oil roller unit.
• Causes: Defective oil roller unit fuse. Defective harness (S02619) between engine controller PWB (KP-801) and oil roller unit detection sensor, or poor contact of the connector terminals.
• Remedy: Defective oil roller unit fuse. Replace the oil roller unit.
  Defective harness (S02619) between engine controller PWB (KP-801) and oil roller unit detection sensor, or poor contact of the connector terminals. Check the continuity of the harness (S02619). Check the insertion of connectors.