• Code: F9 84
• Description: Communication trouble between MCU and printer PWB (Framing error)
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.

• Code: F9 88
• Description: Communication trouble between MCU and printer PWB (Timeout error)
• Causes: Printer PWB connector disconnection Harness trouble between the printer PWB and the MCU PWB Motherboard connector pin breakage Printer PWB ROM trouble/Data disturbance
• Remedy: Check the connectors and harness of the printer PWB and MCU PWB. Check the grounding of the copier. Check ROM on printer PWB.

• Code: F9 99
• Description: The machine language setup does not coincide with the PCL board language setup.
• Causes: PCL board connection error SIM setup error
• Remedy: Check the firmware of the PCL board and the combination of the panel screen data, and download the correct version, if necessary. Check the machine language information. (Machine language setup: SIM 26-22)

• Code: H2 00
• Description: Thermistor open detection Fusing unit not installed
• Causes: Thermistor defect Control PWB failure Fusing section connector contact failure Fusing unit not installed
• Remedy: Check the harness and the connector of the thermistor and the MCU. Clear the display of self-diagnostics with SIM 14. Remarks Thermistor open

• Code: H3 00
• Description: Heat roller abnormally high temperature. The fusing temperature is over 220°C.
• Causes: Thermistor defect Control PWB failure Fusing section connector contact failure
• Remedy: Check the heater lamp blinking with SIM 5- 2. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. If lamp lights and stays lit: Check the power PWB and the MCU PWB lamp control circuit. Clear the display of self-diagnostics with SIM 14.

• Code: H4 00
• Description: Heat roller abnormally low temperature. The setup temperature (about 90°C is not reached within the specified time (about 35sec) from turning on the power ON SW. (When the temperature falls below 120°C in the standby mode.)
• Causes: Thermistor defect Heater lamp failure Thermostat failure Control PWB failure
• Remedy: Check the heater lamp blinking with SIM 5- 2. When the lamp blinks normally: Check the thermistor and the harness. Check the MCU PWB thermistor input circuit. When the lamp does not light: Check for disconnection of the heater lamp and thermostat. Check the interlock switch. Check the power PWB and the MCU PWB lamp control circuit. Clear the display of self-diagnostics with SIM 14.

• Code: H5 01
• Description: 5 continuous T10D(T20D) not-reaching JAM. T10D(T20D) not-reaching JAM was detected 5 continuous times.
• Causes: The fusing JAM is not completely removed. (Jam paper remains.) T10D or T20D sensor breakdown or harness connection trouble Fusing unit installation failure
• Remedy: Check for jam paper in the fusing section. (paper winding, etc.) Check fusing unit installation Clear the trouble with SIM 14.

• Code: H5 02
• Description: Fusing thermistor abnormality detect. Fusing thermistor temperature transient abnormality (Paper winding)
• Causes: Paper wound around the fusing roller. Fusing pawl abnormality Fusing unit installation failure
• Remedy: Check for jam paper in the fusing section. (paper winding, etc.) Check installation of the fusing unit. Check the fusing pawl. Clear the trouble with SIM 14.