Kyocera TASKalfa 2551ci Service Manual page 398

Code
2231 Connection with the FTP server has
failed.
(FTPS communication)
3101 FTP server responded with an error.
Contents Check procedures/corrective measures
1. Confirm device's network parameters.
2. Confirm the network parameters the device is con-
nected.
1. Confirm device's network parameters.
2. Confirm the network parameters the device is con-
nected.
3. Check the FTP server.
1-4-91
2NP