Panasonic KX-TD500 Installation Manual page 292

Troubleshooting
(8) CPU RAM battery alarm
Error Code
Possible cause of
the malfunction
Countermeasures
Note
292
1112: CPU RAM battery alarm
1.
Defective rechargeable lithium battery on the CPU card
2.
Defective CPU card
After replacing lithium battery,
turn on the POWER switch.
Is there a new related error mes-
sage in the Error Log?
Yes
Replace the CPU card.
Enter the system data.
End
Consult the nearest service center.
*1
It is recommended to have a current copy of the program on disk
*2
to facilitate accurate and rapid recovery.
*1
No
*2
Installation Manual