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