Code :

Code: H4-01
Description: Fusing section low temperature trouble (TH_LM)
Causes: Thermistor trouble, heater lamp trouble, PCU PWB trouble, thermostat trouble, AC power source trouble, interlock switch trouble
Remedy: 1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the PCU PWB thermistor input circuit section. 3) If it is not lighted, check for the heater lamp disconnection and the thermostat breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. 4) Use SIM14 to cancel the trouble.

Code: H4-02
Description: Sub thermistor fusing section low temperature trouble (TH_US)
Causes: Thermistor trouble, heater lamp trouble, PCU PWB trouble, thermostat trouble, AC power source trouble, interlock switch trouble
Remedy: 1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the PCU PWB thermistor input circuit section. 3) If it is not lighted, check for the heater lamp disconnection and the thermostat breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. 4) Use SIM14 to cancel the trouble.

Code: H4-04
Description: External heating thermistor fusing section low temperature trouble (TH_EX1)
Causes: Thermistor trouble, heater lamp trouble, PCU PWB trouble, thermostat trouble, AC power source trouble, interlock switch trouble
Remedy: 1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the PCU PWB thermistor input circuit section. 3) If it is not lighted, check for the heater lamp disconnection and the thermostat breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. 4) Use SIM14 to cancel the trouble.

Code: H4-30
Description: Detection thermistor input abnormality (TH_UM)
Causes: HL_UM does not turn on. Thermistor trouble, harness trouble, PCU PWB trouble
Remedy: 1) Use SIM5-2 to check blinking of the heater lamp. 2) If it blinks normally, check the thermistor and the harness. Check the PCU PWB thermistor input circuit section. 3) If it is not lighted, check for the heater lamp disconnection and the thermostat breakage. Check the interlock switch. Check the AC PWB and the PCU PWB lamp control circuit. 4) Use SIM14 to cancel the trouble.

Code: H5-01
Description: 5 continuous detection of POD1 notreached jam
Causes: 5 continuous detection of POD1 not-reached jam
Remedy: Case 1 Cause The fusing jam is not removed completely. (Jam paper remains.) Check and remedy Check the fusing section for jam paper. (winding, etc.) Case 2 Cause POD1 sensor trouble or harness connection trouble Check and remedy Check the POD1 sensor harness. Use SIM14 to cancel the trouble. Case 3 Cause Fusing unit installation trouble Check and remedy Check the fusing unit installation.

Code: H7-10
Description: Low temperature detection during the temperature control reset operation after stopping the alarm in a JOB (HL_UM)
Causes: When the alarm is stopped, the set temperature is not reached within the specified time. * Alarm stop: When the fusing temperature falls below the specified level in a print JOB, printing is interrupted temporarily and the temperature is reset.
Remedy: Case 1 Cause Connector and harness connection trouble Check and remedy Check connection of the connector and the harness. Case 2 Cause Thermistor trouble, thermostat trouble, heater lamp trouble, PCU PWB trouble, AC power source trouble, interlock switch trouble Check and remedy Use SIM 5-2 to check lighting of the heater lamp. Check conduction of the thermostat. Replace the heater lamp, the PCU PWB, and the AC PWB.

Code: H7-11
Description: Low temperature detection during the temperature control reset operation after stopping the alarm in a JOB (HL_LM)
Causes: When the alarm is stopped, the set temperature is not reached within the specified time. * Alarm stop: When the fusing temperature falls below the specified level in a print JOB, printing is interrupted temporarily and the temperature is reset.
Remedy: Case 1 Cause Connector and harness connection trouble Check and remedy Check connection of the connector and the harness. Case 2 Cause Thermistor trouble, thermostat trouble, heater lamp trouble, PCU PWB trouble, AC power source trouble, interlock switch trouble Check and remedy Use SIM 5-2 to check lighting of the heater lamp. Check conduction of the thermostat. Replace the heater lamp, the PCU PWB, and the AC PWB.

Code: H7-12
Description: Low temperature detection during the temperature control reset operation after stopping the alarm in a JOB (HL_US)
Causes: When the alarm is stopped, the set temperature is not reached within the specified time. * Alarm stop: When the fusing temperature falls below the specified level in a print JOB, printing is interrupted temporarily and the temperature is reset.
Remedy: Case 1 Cause Connector and harness connection trouble Check and remedy Check connection of the connector and the harness. Case 2 Cause Thermistor trouble, thermostat trouble, heater lamp trouble, PCU PWB trouble, AC power source trouble, interlock switch trouble Check and remedy Use SIM 5-2 to check lighting of the heater lamp. Check conduction of the thermostat. Replace the heater lamp, the PCU PWB, and the AC PWB.