Description: Pressure roller warm-up error - Timing & Condition - The pressure roller thermistor does not output an analog value corresponding to the ready temperature within 12 minutes after the main switch is turned on.
Causes: • Poor connection of connectors • Pressure roller fusing lamp brown • Pressure roller thermofuse opened • Brown fuse • Power fluctuation • Defective main control board • Defective I/O control board • Defective AC drive board
Remedy: 1. Check if the following connectors are properly connected; • Pressure roller fusing lamp connectors • CN303 on the main control board • CN212 and CN229 on the I/O control board • CN7 on the AC drive board 2. Replace the hot roller fusing lamp if it is opened. 3. Replace the hot roller thermofuse if it is opened. 4. Check if the power supplied from the outlet fluctuates. 5. Replace the main control board, I/O control board, or AC drive board by checking the trigger signal at each pin. [ Signal Check ] • Pressure roller fusing trigger: CN303-B7 on main control board / CN212-B5, TP240, or CN229-4 on I/O control board / CN7-7 on AC drive board.
Code: SC553
Description: Pressure roller overheat - Timing - at every 1 second when the fusing unit is set - Condition - The pressure roller thermistor output is lower than about 0.3V, which is correspond to 220°C, for 3 seconds continuously.
Causes: • Fusing unit not set properly • Poor connection of connector • Defective thermistor • Defective I/O control board • Defective main control board • Defective AC drive board
Remedy: 1. Check if the fusing unit is properly set. 2. Check if the thermistor connector is properly connected. 3. Replace the thermistor if it is deformed. 4. Replace the thermistor if it is opened by measuring the resistance. (Refer to the attached Temperature/ Resistance Conversion Reference Table.) 5. Replace the main control board, I/O control board, or AC drive board by checking output from the thermistor and the trigger signal at each pin. [ Signal Check ] • Thermistor: CN214-A9, TP232, or CN211-B2 on I/O control board / CN302-B8 or TP118 on main control board. • Pressure roller fusing trigger: CN303-B7 on main control board / CN212-B5, TP240, or CN229-4 on I/O control board / CN7-7 on AC drive board.
Code: SC554
Description: Pressure roller low temperature - Timing - at every 1 second after the warm-up is completed - Condition - The pressure roller thermistor output is higher than about 3V, which is correspond to 87°C, for 8 seconds continuously after the warm-up is completed.
Causes: • Fusing unit not set properly • Poor connection of connector • Defective thermistor • Defective I/O control board • Defective main control board • Defective AC drive board
Remedy: 1. Check if the fusing unit is properly set. 2. Check if the thermistor connector is properly connected. 3. Replace the thermistor if it is deformed. 4. Replace the thermistor if it is opened by measuring the resistance. (Refer to the attached Temperature/ Resistance Conversion Reference Table.) 5. Replace the main control board, I/O control board, or AC drive board by checking output from the thermistor and the trigger signal at each pin. [ Signal Check ] • Thermistor: CN214-A9, TP232, or CN211-B2 on I/O control board / CN302-B8 or TP118 on main control board. • Pressure roller fusing trigger: CN303-B7 on main control board / CN212-B5, TP240, or CN229-4 on I/O control board / CN7-7 on AC drive board.
Code: SC555
Description: Pressure roller ready temperature abnormal - Timing - at every 1 second after the temperature reaches to the ready condition - Condition - The pressure roller thermistor output does not reach to the ready temperature within 7 minutes continuously.
Causes: • Fusing unit not set properly • Poor connection of connector • Defective thermistor • Defective I/O control board • Defective main control board • Defective AC drive board
Remedy: 1. Check if the fusing unit is properly set. 2. Check if the thermistor connector is properly connected. 3. Replace the thermistor if it is deformed. 4. Replace the thermistor if it is opened by measuring the resistance. (Refer to the attached Temperature/ Resistance Conversion Reference Table.) 5. Replace the main control board, I/O control board, or AC drive board by checking output from the thermistor and the trigger signal at each pin. [ Signal Check ] • Thermistor: CN214-A9, TP232, or CN211-B2 on I/O control board / CN302-B8 or TP118 on main control board. • Pressure roller fusing trigger: CN303-B7 on main control board / CN212-B5, TP240, or CN229-4 on I/O control board / CN7-7 on AC drive board.
Code: SC557
Description: Pressure roller temperature does not increase - Timing - at every 1 second, 2minutes after the main switch turned on and before the hot roller temperature does not reach to the ready condition - Condition - The pressure roller temperature does not increase by no more than 3°C for a minutes during warm-up.
Causes: • Poor connection of connectors • Pressure roller fusing lamp brown • Pressure roller thermofuse opened • Defective main control board • Defective I/O control board • Defective AC drive board
Remedy: 1. Check if the following connectors are properly connected; • Hot roller fusing lamp connectors • CN303 on the main control board • CN212 and CN229 on the I/O control board • CN7 on the AC drive board 2. Replace the hot roller fusing lamp if it is opened. 3. Replace the hot roller thermofuse if it is opened. 4. Replace the main control board, I/O control board, or AC drive board by checking the trigger signal at each pin. [ Signal Check ] • Pressure roller fusing trigger: CN303-B7 on main control board / CN212-B5, TP240, or CNCN229-4 on I/O control board / CN7-7 on AC drive board.
Code: SC558
Description: Zero cross signal abnormal - Timing & Condition - Zero cross signals generated within certain period does not reach a predetermined number.
Causes: • Poor connection of connectors • Blown fuse • Defective AC drive board • Defective main control board • Defective I/O control board
Remedy: 1. Check if the following connectors are properly connected; • CN212 and CN229 on the I/O control board • CN303 on the main control board • CN7 on the AC drive board 2. Check the continuity of the signal lines of the above harnesses. 3. Replace the fuse (FU101) if it is blown. 4. Replace the AC drive boar, I/O control board, or main control board by checking the signal line at each pin. [ Signal Check ] • Zero cross: CN7-5 on AC drive board / CN229-6, TP216, or CN212-B8 on I/O control board / CN303-B4 or TP120 on main control board