• Code: 1AB1
• Description: Main Board communication error (1)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1AB2
• Description: Main Board communication error (2)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1AB3
• Description: Main Board communication error (3)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1AB4
• Description: Main Board communication error (4)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1AB5
• Description: Main Board communication error (5)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1AB6
• Description: Main Board communication error (6)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1AB7
• Description: Main Board communication error (7)
• Causes: IC failure has occurred on the Main Board.
• Remedy: Replace the Main Board.

• Code: 1F80
• Description: ILS error (1)
• Causes: ILS control error has occurred. • The fuse of the Main Board has blown.
• Remedy: Replace the Main Board.