TA Triumph-Adler P-3525 MFP - Manual (Page 178)

Appendix-14
U19000 Memory reception was stopped because there is
no more free space in the memory of this
machine. Create free space by outputting the data
stored in the memory, and ask the sender to
resend.
U19100 Transmission was stopped because there is no
more free space in the memory of the recipient
machine. Check with the recipient.
U19200 Memory transmission was stopped due to a data
error occurring during transmission. Send again.
U19300 Transmission was stopped due to a data error
occurring during transmission. Send again.
U19400 Reception was stopped due to a data error
occurring during reception. Ask the sender to
resend.
Error Code Possible Cause/Action