Panasonic KX-T336 System Reference Manual page 1495

4.00 Troubleshooting via User-Reported Troubles
If a problem is not detected by the system, a report from the user is very useful to
determine the trouble.
The basic procedure to determine the cause of the trouble according to a report
from the user is shown in the following flow chart.
Can related error message be read
out ?
No
Check the status of the device from
the maintenance terminal
Fault
Is the failure report printed out?
No
No
Is the Remote Alarm reported?
No
Infer the probable defective device
through the User-Reports
NG
Replace the probable defective
device
User-Reported Troubles
Not fault
Is the Local Alarm reported?
Enter the system data
End
Detect failures according to the
Error Code
NG
OK
14-E-38
Yes
Yes
Yes
Yes
OK