Panasonic KX-T336 System Reference Manual page 540

3.04 Basic shelf power down (DC)
Error Code
Possible cause of 1) AC power cord is unplugged
the malfunction 2) Power Failure
3) Power Switch is turned off
4) Malfunction in the Power Supply Unit of the Basic Shelf, or the trouble with
the Power Supply System (Backboard, CPU card) of the Shelf
Countermeasures
Note
0400
/
No
1 Does the trouble occur frequently? 1
Yes yy
No change in
OK
.
condiiion
,
w
I
Replace the CPU card*
No change in
OK
condition
3
Reolace the Shelf I
l
It is recommended to have a current copy of the program on disk or tape to
facilitate accurate and rapid recovery.
14-E-7