Panasonic KX-TD500 Installation Manual page 271

5.2.2 CPU Test (Off-line diagnosis)
4. Click CPU .
• "CPU Test" screen is displayed.
5. Click Execute .
• After executing the test, the CPU Test Result is displayed.
Description
Result
Error Indication
Error Indication Table
RAM failure
Calendar IC failure
Item
Display/Input Value
OK
NG
See "Error Indication
Table."
Error Message
Description
The results of diagnosis.
The details of an error.
Displayed only when Result is NG (no good).
Description
RAM Read/Write failure.
Calendar IC is not functioning properly.
Utility 5-15