Code :

Code: 533-00
Description: PSU fan motor error. The motor lock signal error is detected 50 consecutive times (5 seconds) after the motor lock signal was first detected.
Causes: • Defective fan motor • Disconnected or defective harness • Defective BiCU
Remedy: 1. Check or replace the harness. 2. Replace the fan motor. 3. Replace the BiCU.

Code: 540-00
Description: Fusing motor error The machine detects a High signal from the fusing motor 20 consecutive times after the motor turned on.
Causes: • Motor overload • Defective fusing motor • Shorted +24 fuse on the PSU
Remedy: 1. Check or replace the harness. 2. Replace the fusing motor. 3. Replace the +24 fuse on the PSU.

Code: 541-01
Description: Fusing thermopile error. This SC occurs when the machine detects the value of AD is the prescribed value for 0.2 consecutive seconds after the fusing lamp is activated.
Causes: • Broken thermopile • Connector contact failure
Remedy: • Reconnect the connector between the fusing unit and the BiCU. • Replace the fusing thermopile • Replace the harness between the fusing unit and the BiCU. • Replace the BiCU. • Replace the AC controller board.

Code: 541-11
Description: Fusing thermopile error (Low power) This SC occurs when the machine detects the value of AD is the prescribed value for 0.2 consecutive seconds after the fusing lamp is activated.
Causes: • Broken thermopile • Connector contact failure
Remedy: • Reconnect the connector between the fusing unit and the BiCU. • Replace the fusing thermopile • Replace the harness between the fusing unit and the BiCU. • Replace the BiCU. • Replace the AC controller board.

Code: 542-02, 542-03
Description: Fusing thermopile reload error • The heating roller temperature does not reach a temperature of 80 degrees C within the prescribed time. • The center temperature of the heating roller does not reach the target reload permit temperature within the prescribed time. • The center temperature of the heating roller does not reach the target temperature after starting the heater control in warm up with low temperature.
Causes: • Dirty or defective thermopile lenses • Defective thermistor • Input voltage out of specification (out of warranty)
Remedy: 1. Check and clean the thermopile lenses. 2. Check that the fusing thermopile is firmly connected. 3. Replace the thermopile.

Code: 542-12
Description: Fusing thermopile cannot reload (low power) This SC is detected if the temperature does not reach a temperature of 80 degrees C after passing seven seconds when: • The machine starts warming up. • The machine returns from energy saver mode. • The fusing lamp is activated.
Causes: • Dirty or defective thermopile lenses • Input voltage out of specification (out of warranty) • Fuse blown out.
Remedy: 1. Check the power supply voltage (change the power cord). 2. Replace the fusing thermostat. 3. Replace the fusing lamp. 4. Replace the fusing thermopile. 5. Replace the BiCU. 6. Replace the AC controller board.

Code: 542-13
Description: Fusing thermopile cannot reload (low power) This SC is detected if the temperature does not reach the reload permit temperature (center) after passing eight seconds when: • The machine starts warming up. • The machine returns from energy saver mode. • The fusing lamp is activated.
Causes: • Dirty or defective thermopile lenses • Input voltage out of specification (out of warranty) • Fuse blown out.
Remedy: 1. Check the power supply voltage (change the power cord). 2. Replace the fusing thermostat. 3. Replace the fusing lamp. 4. Replace the fusing thermopile. 5. Replace the BiCU. 6. Replace the AC controller board.

Code: 543-00
Description: Fusing thermopile overheat (software error) Fusing thermopile detects a temperature of 240 degrees C or more for 10 seconds after the relay is activated.
Causes: • Triac short • IOB failure • BiCU failure
Remedy: 1. Reconnect the connector between the fusing unit and BiCU. 2. Replace the fusing thermopile. 3. Replace the harness between the fusing unit and BiCU. 4. Replace the BiCU. 5. Replace the AC controller board. 6. Replace the fusing unit (if the problem cannot be resolved).