SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC508-00

B

Bypass bottom plate operation error

The signal from the bypass bottom plate position sensor has not changed (the signal has not changed from ON to OFF or vice versa) for 4 seconds or more after the start of reverse Paper Feed Unit rotation. If the error is detected three times in succession, the SC number is displayed on the operation panel.

  • Bypass bottom plate clutch connector disconnected or other error
  • Bypass bottom plate sensor connector disconnected or other error
  • Bypass bottom plate sensor feeler stuck or other error
  • Check and replace the bypass bottom plate sensor connector connection.
  • Replace the bypass bottom plate sensor feeler.
  • Replace the harness.
  • Replace the BiCU.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC520-00

D

Main motor error

When the main motor is driven, the lock (state of rotation) signal is checked every 100 milliseconds. If the machine detects the lock signal in the High status 20 times in succession, it reports this error.

  • The main motor incurs too much load from a defective unit.
  • The main motor is defective.

Replace the defective unit or the motor.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC530-00

D

Fusing fan error

The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to receive the lock signal 50 times in succession.

  • Failure in the motor
  • Loose connector
  • Harness damaged
  • Failure in the BiCU
  • Replace the fan motor.
  • Check the connector.
  • Replace the harness.
  • Replace the BiCU

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC531-00

D

Development Cooling fan error

The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to receive the lock signal 50 times in succession.

  • Failure in the motor
  • Loose connector
  • Harness damaged
  • Failure in the BiCU
  • Replace the fan motor.
  • Check the connector.
  • Replace the harness.
  • Replace the BiCU.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC532-00

D

PSU Cooling fan error

The fan motor lock (rotating state) signal is sampled at 100 ms intervals and the machine fails to receive the lock signal 50 times in succession.

  • Failure in the motor
  • Loose connector
  • Harness damaged
  • Failure in the BiCU
  • Replace the fan motor.
  • Check the connector.
  • Replace the harness.
  • Replace the BiCU.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC541-00

A

Broken fusing (Center) thermistor wire

The condition whereby the temperature is -20 deg C or less for 5 seconds has been detected 10 times or more.

  • Broken thermistor wire
  • Bad connector contact
  • Clear the SP: fusing SC.
  • Check the connector connection.
  • Replace the fusing (Center) thermistor.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC542-01

A

Fusing lamp (Center) not reloaded (Deformed thermistor)

The heater thermistor has increased by less than 20 degrees C in 3 seconds 5 times in a row.

  • Deformed or floating thermistor
  • Input voltage out of range
  • Clear the SP: fusing SC.
  • Replace the thermistor.

SC542-02

A

Fusing lamp (Center) not reloaded (Broken heater wire)

The heater (Center) thermistor does not reach the reload temperature 23 seconds after the start of motor rotation.

  • The overtemperature prevention mechanism started working
  • Clear the SP: fusing SC.
  • Replace the thermistor.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC543-00

A

Fusing (Center) thermopile high-temperature detected (software)

The temperature is detected to stay at 250 degrees C or higher for one second.

  • Shorted triac
  • Failure in the BiCU
  • Clear the SP: fusing SC.
  • Replace the BiCU.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC544-00

A

Fusing (Center) thermopile high-temperature detected (hardware)

The hardware high-temperature error sensor flag is detected (250 degrees C or higher).

  • Damaged triac (shorted)
  • Failed engine control board
  • Failed fusing thermopile
  • Failed fusing thermistor
  • Abnormal fusing control software behavior
  • The PWM signal is continuously supplied from the IH inverter (due to a software or temperature sensor error).
  • Clear the SP: fusing SC.
  • Replace the PSU.
  • Replace the Engine Board.
  • Replace the fusing thermopile.
  • Replace the fusing thermistor.
  • Replace the Fusing Unit.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC545-00

A

Fusing (Center) lamp stays ON

The thermistor (center) has not detected the target temperature, even after the fusing lamp stays ON for more than 11 seconds after reloading.

  • Deformed or floating thermistor
  • Broken fusing lamp wire
  • The overtemperature prevention mechanism started working
  • Clear the SP: fusing SC.
  • Replace the fusing thermistor.
  • Replace the fusing (Center) lamp.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC547-01

D

Zero-crossing error (adhered relay contact)

When the fusing relay is in an OFF state, a "zero-crossing interrupt request" occurs in 50 ms.

  • Damaged fusing relay (adhered contact)
  • Failure in the fusing relay drive circuit
  • PSU fuse (24VS) blown
  • Unstable frequencies at the commercial power supply
  • Check the commercial power supply.
  • Replace the fuse.
  • Replace the PSU.

SC547-02

D

Zero-crossing error (bad relay contact)

If a "zero-crossing interrupt request" does not occur in three seconds after the fusing relay is in an ON state, an error results.

  • Damaged fusing relay (open contact)
  • Failed fusing relay drive circuit
  • PSU fuse (24VS) blown
  • Unstable frequencies at the commercial power supply
  • Check the commercial power supply.
  • Replace the fuse.
  • Replace the PSU.

SC547-03

D

Zero-crossing error (low frequency error)

The number of zero-crossing interrupts does not reach a certain value in 500 ms.

  • Unstable frequencies at the commercial power supply
  • Check the commercial power supply.
  • Replace the PSU.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC551-00

A

Broken fusing (End) thermistor wire

At least ten times, the temperature is detected to stay at -20 degrees C or less for 5 seconds.

  • Broken thermistor wire
  • Bad connector contact
  • Clear the SP: fusing SC.
  • Check the connector connection.
  • Replace the fusing (End) thermistor.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC553-01

SC553-02

A

Fusing (End) thermistor high-temperature detected (software)

(553-01)

In a condition of 235 degrees C or higher temperature, the temperature has increased more than 10 degrees C per 1 second, the heater has continuously reached 100% (maximum) duty, and the center thermistor has detected the failure to reach the target temperature by 11 degrees C.

(553-02)

The temperature is detected to stay at 250 degrees C or higher for one second.

  • Failed fusing (end) thermistor
  • Clear the SP: fusing SC.
  • Replace the fusing (end) thermistor.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC554-00

A

Fusing (End) thermistor high-temperature detected (hardware)

The hardware high-temperature error sensor flag is detected (250 degrees C or higher).

  • Damaged triac (shorted)
  • Failed engine control board
  • Failed fusing thermopile
  • Failed fusing thermistor
  • Abnormal fusing control software behavior
  • The PWM signal is continuously supplied from the IH inverter (due to a software or temperature sensor error).
  • Clear the SP: fusing SC.
  • Replace the PSU.
  • Replace the Engine Board.
  • Replace the fusing thermopile.
  • Replace the Fusing Unit.

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC557-00

C

Zero-crossing frequency exceeded

The number of zero-crossing interrupts exceeds a certain value in 500 ms.

The frequency of the commercial power supply line is unstable or noise occurs.

None

SC No.

Level

Error Name/Error Condition/Major Cause/Solution

SC559-00

A

Fusing jam detected 3 times in succession

Fusing jam is detected three times in succession.

Paper is wrapped around the fusing roller.

Clear the SP: fusing SC.