• Code: 43
• Description: The head thermistor has been opened or shorted abnormally.
• Causes:
• Remedy: Head flat cables not connected correctly Correct those flat cables. Head flat cables broken Replace the carriage PCB ASSY. Carriage PCB defective Main PCB defective Replace the main PCB.

• Code: 44
• Description: The temperature of the print head driver has risen abnormally. The head driver chip temperature sensor in the head driver detects abnormally high temperature.
• Causes:
• Remedy: Head property parameters incorrect in the EEPROM Enter the correct parameter values. Air bubbles in the head/ carriage unit Perform the initial purge. Head flat cables and carriage-head flat cable not connected correctly Correct those flat cables. Head flat cables broken Replace the carriage PCB ASSY. Carriage-head flat cable broken Replace the head/carriage unit. Head/carriage unit broken Main PCB defective Replace the main PCB.

• Code: 46
• Description: The number of performed purge sequences has reached the limit. The ink absorber box may be filled with drained ink.
• Causes: Purge counter overflown
• Remedy: Replace both the ink absorber box and flushing box and reset their counters. (When you need to replace the ink absorber box or flushing box, replace both.)

• Code: 46
• Description: The number of flushing operations has reached the limit. The flushing box may be filled with drained ink.
• Causes: Flushing counter overflown
• Remedy: Replace both the ink absorber box and flushing box and reset their counters. (When you need to replace the ink absorber box or flushing box, replace both.)

• Code: 48
• Description: Weak connection of the head flat cables.
• Causes: Head flat cables or carriagehead flat cable broken or not connected
• Remedy: Correct the connection of the head flat cables. Replace the carriage PCB ASSY. Replace the head/carriage unit. Replace the main PCB.

• Code: 49
• Description: The head drive voltage has not risen to the specified level.
• Causes:
• Remedy: Head flat cables and carriage-head flat cable not connected correctly Correct those flat cables. Head/carriage unit defective Replace the carriage PCB ASSY. Replace the head/carriage unit. Main PCB defective Replace the main PCB. Power supply PCB defective Replace the power supply PCB.

• Code: 4F
• Description: The head drive voltage has dropped from the high to low level in an abnormally short period. The head drive voltage has not risen to the specified level within the specified period in the self-diagnosis.
• Causes:
• Remedy: Piezoelectric ceramic actuator defective (Cracks or rare short) Replace the carriage PCB ASSY. Replace the head/carriage unit. Main PCB defective Replace the main PCB.

• Code: 50, 51
• Description: The purge cam switch does not come ON or OFF even after the purge cam has been driven by the specified number of pulses.
• Causes:
• Remedy: Planetary arm assembly not engaged correctly Set the maintenance unit into place. If the planetary arm does not move smoothly, clean it. Purge cam switch harness not connected correctly Correct the connection. Purge cam switch broken Replace the maintenance unit. Gear(s) on the maintenance unit broken Paper feed motor defective Replace the paper feed motor. Power supply PCB defective Replace the power supply PCB. Main PCB defective Replace the main PCB.