• Code: 39
• Description: HUM sensor failure
• Causes: 1 Harness connection failure of THM/HUM sensor. 2 THM/HUM sensor failure. 3 Engine PCB failure.
• Remedy: 1 Harness connection failure of THM/HUM sensor Check the harness connection of the THM/HUM sensor and reconnect it. 2 THM/HUM sensor failure Replace the THM/HUM sensor holder ASSY. 3 Engine PCB failure Replace the engine PCB ASSY.

• Code: 3A
• Description: Engine communication error
• Causes:
• Remedy:

• Code: 3B
• Description: Main PCB RAM failure
• Causes: 1 Main PCB failure
• Remedy: Replace the main PCB ASSY.

• Code: 3D
• Description: Main PCB failure
• Causes:
• Remedy:

• Code: 3F
• Description: Writing error into engine firmware
• Causes:
• Remedy:

• Code: 50
• Description: Replace the drum unit
• Causes:
• Remedy:

• Code: 51
• Description: Replace the MP paper feeding kit
• Causes:
• Remedy:

• Code: 52
• Description: Replace the T1 paper feeding kit
• Causes:
• Remedy: