Panasonic UF-E1 Service Manual page 73

4.3.7. Information Codes: 459, 494, 495
Check the line connection
between the telephone jack on
the wall and the NCU PCB.
Is communication with the
reference unit successful?
Does the trouble occur
regardless of the remote unit?
If the telephone line frequently
disconnects at the beginning of each
communication, ask the telephone
company to check the line.
START
No
Yes
No
Yes
END
1. Replace the SC PCB.
2. Replace the NCU PCB.
Does the problem still occur?
Yes
Have the telephone line checked.
1. Check the remote unit in
question. (Remote unit defective)
2. Refer to Sect. 4.6.
69
No
END
UF-E1