• Code: 557-00
• Description: Zero cross frequency error The frequency of the power source is 66Hz or more. This SC is detected just after the main power is turned ON.
• Causes: • Noise (High frequency) • Defective PSU
• Remedy: 1. Check the power supply source. 2. Replace the PSU.

• Code: 559-00
• Description: Consecutive fusing jam The paper jam counter for the fusing unit reaches three consecutive times (the fusing exit sensor does not detect the paper).
• Causes: • Paper jam in the fusing unit.
• Remedy: 1. Replace the separation plate. 2. Replace the gear (fusing unit). 3. Replace the fusing unit. 4. Replace the fusing motor. 5. Replace the gear (mainframe), if damaged.

• Code: 561-01
• Description: Pressure roller thermistor (center) disconnection Pressure roller thermistor (center) detects a temperature of -11 degrees C for 20 consecutive seconds after the fusing lamp is activated when the main power is turned on or during feeding paper or low power.
• Causes: • Thermopile disconnection • Loose connector
• Remedy: • Reconnect the connectors between the fusing drawer connector, the BiCU, and the pressure roller thermistor. • Replace the thermistor. • Replace the fusing unit. • Replace the harnesses between the BiCU and the pressure roller thermistor. • Replace the BiCU. • Replace the AC controller board.

• Code: 561-11
• Description: Pressure roller thermistor (center) disconnection (low power) Pressure roller thermistor (center) detects a temperature of -11 degrees C for 20 consecutive seconds after the fusing lamp is activated when the machine starts, or during feeding paper or in low power.
• Causes: • Thermistor disconnection • Loose connector
• Remedy: • Reconnect the connectors between the fusing drawer connector, the BiCU, and the pressure roller thermistor. • Replace the thermistor. • Replace the fusing unit. • Replace the harnesses between the BiCU and the pressure roller thermistor. • Replace the BiCU. • Replace the AC controller board.

• Code: 562-02
• Description: Heating roller warm-up error (sensor 3) Pressure roller thermistor (Center) detects that the temperature does not reach a temperature of 40 degrees C for 25 consecutive seconds when the main power is turned on.
• Causes: • Dirty or deformed thermistor • Input voltage out of specification (out of warranty) • Fuse blown out
• Remedy: • Check the input voltage and replace the power plug. • Replace the fusing thermostat. • Replace the fusing lamp. • Replace the thermistor. • Replace the BiCU. • Replace the AC controller board.

• Code: 562-12
• Description: Pressure roller thermistor (center) cannot be reloaded (low power) Pressure roller thermistor (center) detects that the temperature does not reach a temperature of 40 degrees C for 25 consecutive seconds when the main power is turned on.
• Causes: • Dirty or deformed thermistor • Input voltage out of specification (out of warranty) • Fuse blown out
• Remedy: • Check the input voltage and replace the power plug. • Replace the fusing thermostat. • Replace the fusing lamp. • Replace the thermistor. • Replace the BiCU. • Replace the AC controller board.

• Code: 563-00
• Description: Pressure roller overheat (software error): Center Pressure roller thermistor (center) detects a temperature of 230 degrees C 10 times after the fusing relay is ON.
• Causes: • Shorted triac • IOB error • BiCU error
• Remedy: 1. Reconnect the connectors between the fusing drawer connector, BiCU, and the pressure roller thermistor. 2. Replace the thermistor. 3. Replace the harnesses between the BiCU and pressure roller thermistor. 4. Replace the BiCU. 5. Replace the fusing unit if all the above steps cannot resolve the issue.

• Code: 564-00
• Description: Pressure roller overheat (hardware error): Center Pressure roller thermistor (center) detects the prescribed temperature.
• Causes: • Shorted triac • IOB error • BiCU error • Fusing unit: out of control
• Remedy: 1. Reconnect the connectors between the fusing drawer connector, BiCU, and the pressure roller thermistor. 2. Replace the thermistor. 3. Replace the harnesses between the BiCU and pressure roller thermistor. 4. Replace the BiCU. 5. Replace the fusing unit if all the above steps cannot resolve the issue.