• Code: 856
• Description: IEEE802.11b interface board error
  Wireless LAN interface board error detected.
• Causes: • Poor connection • Defective wireless LAN interface board

• Code: 857
• Description: USB I/F Error
• Causes: • Defective controller

• Code: 866
• Description: USB interface error detected.
• Causes: • Data corruption

• Code: 867
• Description: SD card access error 1
  After the program saved in the SD card starts running, the SD card is removed from the slot.
• Causes: • SD card removed

• Code: 868
• Description: SD card access error 2
  Incorrect data is detected in the SD card.
• Causes: • SD card defective • SD controller defective

• Code: 870
• Description: Address Book Data Error
  Address book data stored on the hard disk was detected as abnormal when it was accessed from either the operation panel or the network.
• Causes: • Software defective

• Code: 871
• Description: FCU Flash ROM Error
  The address book written into the flash ROM mounted on the FCU is detected as defective.
• Causes: • Flash ROM device defective • Replace flash ROM on the MBU

• Code: 900
• Description: Electrical total counter error
  The electrical total counter does not work properly.
• Causes: • NVRAM on the GW controller board defective