• Code: B9
• Description: Scanning light adjustment error is detected.
• Causes: FB unit failure. Main PCB failure
• Remedy: 1 FB unit failure Replace the FB unit. 2 Main PCB failure Replace the main PCB ASSY.

• Code: BB
• Description: White level data error
• Causes: FB unit failure. Main PCB failure.
• Remedy: 1 FB unit failure Replace the FB unit. 2 Main PCB failure Replace the main PCB ASSY.

• Code: E6
• Description: NVRAM error on main PCB
• Causes: Main PCB failure.
• Remedy: 1 Main PCB failure Replace the main PCB ASSY.

• Code: EC
• Description: Fan performance malfunction
• Causes: Harness connection failure of fan motor. Fan motor failure. Main PCB failure.
• Remedy: 1 Harness connection failure of fan motor Check the harness connection of the fan motor, and reconnect it. 2 Fan motor failure Replace the fan motor. 3 Main PCB failure Replace the main PCB ASSY.

• Code: F8
• Description: Battery connection failure
• Causes: Battery harness connection failure. Battery exhausted. Main PCB failure.
• Remedy: 1 Battery harness connection failure Reconnect the battery harness. 2 Battery exhausted Replace the battery. 3 Main PCB failure Replace the main PCB ASSY.

• Code: F9
• Description: Maintenance mode 74 Non-decision (Inputting omission of the customizing code.)
• Causes: Turn the power off, when the Maintenance mode 74 is in progress.
• Remedy: 1 Turn the power off, when the Maintenance mode 74 is in progress. Implement the Maintenance mode 74 again.