• Code: H3 00, H3 HL1
• Description: Fusing section high temperature trouble. The fusing temperature exceeds 242°C. (An input voltage of 0.27V or above is detected.)
• Causes: thermistor trouble Control PWB trouble Fusing section connector disconnection AC power trouble
• Remedy: Use DIAG (SIM5-2) to check the heater lamp Blinking operation. If the heater lamp blinks normally: Check the thermistor and its harness. Check the thermistor input circuit in the control PWB. If the heater lamp keep lighting: Check the AC PWB and the lamp control circuit in the control PWB. Use DIAG (SIM14) to cancel the trouble

• Code: H3 01, H3 HL2
• Description: Fusing section high temperature trouble. The fusing temperature exceeds 242°C. (An input voltage of 0.27V or above is detected.)
• Causes: thermistor trouble Control PWB trouble Fusing section connector disconnection AC power trouble
• Remedy: Use DIAG (SIM5-2) to check the heater lamp Blinking operation. If the heater lamp blinks normally: Check the thermistor and its harness. Check the thermistor input circuit in the control PWB. If the heater lamp keep lighting: Check the AC PWB and the lamp control circuit in the control PWB. Use DIAG (SIM14) to cancel the trouble

• Code: H4 00, H4HL1
• Description: Fusing section low temperature trouble. •The set temperature is not reached within the specified time (normally 3 min) when warming up or resetting from pre-heating. •Under the ready state. (An input voltage of 1.21V or below is detected 5 times continuously.)
• Causes: thermistor trouble Heater lamp trouble Control PWB trouble Thermostat trouble AC power trouble Interlock switch trouble
• Remedy: Use DIAG (SIM5-2) to check the heater lamp Blinking operation. If the heater lamp blinks normally: Check the thermistor and its harness. Check the thermistor input circuit in the control PWB. If the heater lamp does not light: Check for heater lamp disconnection and thermostat disconnection. Check the interlock switch. Check the AC PWB and the lamp control circuit in the control PWB. Use DIAG (SIM14) to cancel the trouble.

• Code: H4 01, H4HL2
• Description: Fusing section low temperature trouble. •The set temperature is not reached within the specified time (normally 3 min) when warming up or resetting from pre-heating. •Under the ready state. (An input voltage of 1.21V or below is detected 5 times continuously.)
• Causes: thermistor trouble Heater lamp trouble Control PWB trouble Thermostat trouble AC power trouble Interlock switch trouble
• Remedy: Use DIAG (SIM5-2) to check the heater lamp Blinking operation. If the heater lamp blinks normally: Check the thermistor and its harness. Check the thermistor input circuit in the control PWB. If the heater lamp does not light: Check for heater lamp disconnection and thermostat disconnection. Check the interlock switch. Check the AC PWB and the lamp control circuit in the control PWB. Use DIAG (SIM14) to cancel the trouble.

• Code: H5 01
• Description: 5-time continuous POD1 not-reaching jam detection
• Causes: A fusing section jam is not properly removed. (Jam paper remains.) POD1 sensor trouble, or harness disconnection Improper installation of fusing unit
• Remedy: Check jam paper in the fusing section. (winding, etc.) Check POD1 sensor harness, and check installation the fusing unit. Use DIAG (SIM14) to cancel the trouble.

• Code: L4 01
• Description: Main motor lock detection. The motor lock signal is detected for 1.5sec during rotation of the main motor.
• Causes: main motor trouble Check connection of harness between the PCU PWB and the main motor. Control circuit trouble
• Remedy: Use DIAG (SIM25-1) to check the main motor operation. Check harness and connector between the PCU PWB and the main motor.

• Code: L4 02
• Description: Drum motor lock detection. The motor lock signal is detected for 1.5sec during rotation of the drum motor.
• Causes: Drum motor trouble Improper connection of harness between the PCU PWB and the drum motor. Control circuit trouble
• Remedy: Use DIAG (SIM25-1) to check the drum motor operation. Check harness and connector between the PCU PWB and the drum motor.

• Code: L6 10
• Description: Polygon motor lock detection. It is judged that the polygon motor lock signal is not outputted. Lock signal is checked in the interval of 10sec after starting the polygon motor, and it is judged that the polygon motor does not rotate normally.
• Causes: The LSU connector or harness in the LSU is disconnected or broken. Polygon motor trouble
• Remedy: Use DIAG (SIM61-1) to check the polygon motor operation. Check connector and harness connection. Replace LSU.