• Code: U30, U31
• Description: Flash Failure The Flash Memory device on the Engine Control Board has failed. Code U30: Flash Hardware Failure Code U31: Flash Software Failure
• Causes: • Engine Control Board, PL1.1.4
• Remedy: 1 Cycle power to the printer. Does the error reappear? Replace the Engine Control Board. Complete

• Code: U32
• Description: Fuser Fan Failure The Fuser Fan rotation signal indicates that the fan is no longer operational.
• Causes: • Fuser Fan, PL2.1.111 • IDFAN harness, PL5.1.31 • Engine Control Board, PL1.1.4
• Remedy: 1 Check the following for evidence of fault or damage: • Fuser Fan • P/J250 • FSRFAN Harness Is there any damage? Replace any damaged parts. Go to Step 2. 2 Check the Fan connection. Is P/J250 on the printer frame securely connected? Go to Step 3. Connect the Fan. 3 Check for +24 V at the Fan connector. Disconnect the P/J250. Is there +24 V between J250-1 <=> ground? Replace the Fuser Fan. Go to Step 4. 4 Check for +24 V at the IDFAN connector. Disconnect IDFAN from the Imaging Unit Sensor Board. Is there +24 V between IDFAN-7 <=> ground? Go to Step 5. Go to Step 6. 5 Check continuity of the FSRFAN Harness. Disconnect IDFAN and P/J250. Is the wiring harness conductive? Replace the Fuser Fan. Replace the harness. 6 Check continuity of the CTG1 Harness. Is the wiring harness conductive? Replace the Engine Control Board Replace the harness.

• Code: U33
• Description: Fuser 110v/220v Mismatch Failure An error was detected in the Fuser.
• Causes: • Fuser PL1.1.21 • Engine Control Board, PL1.1.4
• Remedy: 1 Ensure the proper Fuser (110v vs. 220v) is installed in the printer. Is the correct Fuser installed? Replace the Engine Control Board. Replace the Fuser.

• Code: U34
• Description: Unsupported Duplex Unit ROM The installed Duplex Unit does not contain the correct firmware.
• Causes: • Duplex Unit, PL16.1.0 • Engine Control Board PL1.1.4
• Remedy: 1 Check the following for evidence of fault or damage: • Duplex Connector Is there any damage? Replace any damaged parts. Go to Step 2. 2 Check that the Duplex Unit is correctly installed and fully seated. Go to Step 3. Reseat the Duplex Unit 3 Check the Duplex Unit version using the Service Diagnostics General Status menu. Is the version current? Replace Engine Control Board, if the error persists, replace the DUPLEX harness. Replace the Duplex Unit.

• Code: U35 ... U38
• Description: Unsupported Tray [3][4][5][6] ROM The printer has detected an incompatible LTA or HCF assembly. Code U35: Unsupported Tray 3 ROM Code U36: Unsupported Tray 4 ROM Code U37: Unsupported Tray 5 ROM Code U38: Unsupported Tray 6 ROM
• Causes: • Option Control Board
• Remedy: 1 Check the following for evidence of fault or damage: • Option Connector Is there any damage? Replace any damaged parts. Go to Step 2. 2 Check that the optional tray is correctly installed and fully seated. Go to Step 3. Reseat the option tray. 3 Check the Option Control Board version using the Service Diagnostics General Status menu. Is the version current? Replace the Engine Control Board Replace the Option Control Board.

• Code: U50
• Description: Unsupported Inverter Unit ROM The printer has detected an incompatible Inverter assembly.
• Causes: • Inverter Control Board
• Remedy: 1 Check the Inverter firmware version using the Service Diagnostics General Status menu. Is the version current? Replace the Engine Control Board Replace the Inverter Control Board.

• Code: U51
• Description: Inverter Unit Interface Failure A communication error has occurred in the Finisher Inverter.
• Causes: • Inverter Control Board • Engine Control Board, PL1.1.4
• Remedy: 1 Check the following for evidence of fault or damage: • Inverter Interface Cable • Inverter connections Is there any damage? Replace any damaged parts. Go to Step 2. 2 Check the Inverter connection. Is the Inverter interface cable securely connected at both ends? Go to Step 3. Connect the Inverter to the Finisher. 3 Check all pins on the OPTIF Harness for continuity. Disconnect OPTIF from the Engine Control Board and Option connector. Is the harness conductive? Replace the Inverter Control Board. If the error persists, replace the Engine Control Board. Replace the OPTIF Harness.

• Code: U55
• Description: Unsupported Finisher Unit ROM The printer has detected an incompatible Finisher.
• Causes: • Finisher Control Board
• Remedy: 1 Check the Finisher firmware version using the Service Diagnostics General Status menu. Is the version current? Replace the Engine Control Board Replace the Finisher Control Board.