Panasonic UF-890 Service Manual page 121

4.3.2 Information Codes: 401, 402, 422
401
START
Is the ID Number programmed
into your machine?
Yes
Is the Receiving unit set up for
Selective Receive?
No
Is the Receiving unit set up for
Password Reception?
No
Are you sending a Confidential
Mail?
No
END
402, 422
START
Is communication with the
reference unit successful?
Check the remote unit in question.
(Remote unit is defective)
END
No
Program the ID Number.
Yes
Check the Selective Receive
settings at the receiving unit.
Yes
Program the Receive Password
to match the receiving unit.
(Fax Parameter No. 044)
Yes
Check with the receiving end,
the mailboxes may be full.
121
No
Yes
Replace the FCB PCB.