Panasonic KX-TD500 Installation Manual page 253

5.2 Troubleshooting Guide
Basic shelf AC power down
Error Code 1200
1.
Possible cause of
the malfunction
2.
3.
Countermeasures
No change in
No change in
1.
Note
254
AC power cord is unplugged
Power Failure
Malfunction of the Power Supply Unit of the Basic Shelf or Power Supply
System (Backboard, CPU card) failure of the Shelf
Did the above item 1) or 2) occur
at the recorded time of the Error
Log?
No
Does the trouble occur frequently?
Yes
Replace the Power Supply Unit.
condition
Replace the CPU card*.
condition
It is desirable to store the system programming data on a floppy disk to
facilitate accurate and rapid recovery, considering the limited running time
(about 3 years) of the backup battery in case the Power Failure continues for a
long time.
Replace the Shelf.
End
Yes
NO
OK
OK
Troubleshooting