Panasonic KX-T336 System Reference Manual page 1590

C. Troubleshooting
1. If the following troubles should occur during
backup operation, stop the operation and
return to the initial screen.
• When the communication cable has been
disconnected.
• When the remote terminal has lost power.
In above case stop the loading and boot the
system with default values compulsorily.
Error Message List
Error Message
Data error 027
Data error 029
Data error 030
Data error 031
* Version=System Data Version
The system firmware (ROM) needs to be changed only in case of a software update
involving an alteration in the data format of the system area. The backup function does not
allow compatibility between different system data versions. Data saved using the old
version of the firmware can be used as is even if the firmware is updated, as long as the
system programming data (RAM) is not changed.
2. Checksum error detection
Contents
Backup device is not connected.
(only when maintenance device is
attendant console)
Different version* at the time of
backup.
A checksum error has been
detected.
Incorrect data has been received.
17-C-1
If checksum error occurs during loading the
saved data, an error message appears on the
screen and loading is terminated.
Then the system is reset and started with
default values automatically.
Countermeasures
Connect the backup device to SIO
#1 Port.
Match the backup version.
Communication line is defective or
backup data is destroyed.
Communication line is defective or
backup data is destroyed.