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4.1 Troubleshooting
120 Installation Manual
002 System Reset • Reset Button is pressed
• Power failure
• Main Board malfunction
• Erroneous processing of
Main Board software
• Software error due to external
factors
• Ignore if not frequent
• Press the Reset Button
• Reprogram the PBX
• Replace the PBX
010 AC power down • AC power down
• Bad connection or breaking of
AC cord
• Check the power supply system
• See if the AC cord is connected
properly
• Check the AC cord
• Replace the AC cord (be sure to turn
off the PBX when replacing)
011 DC power down • AC power down
• Power supply circuit (Main
Board) malfunction
• Detection of over current
(short circuit on optional
service cards)
• Check the power supply system
• See if the AC cord is connected
properly
• Check the AC cord
• Replace the AC cord (be sure to turn
off the PBX when replacing)
• Replace the PBX
• Remove the optional service cards and
restart the PBX
012* MPR RAM
battery low
• Battery out
• Main Board (MPR)
malfunction
• Replace the PBX
020* SD file access
error
• SD Memory Card malfunction
• Bad connection of SD
Memory Card
• Main Board malfunction
• Press the Reset Button
• Reprogram the PBX
• Replace the SD Memory Card
• Replace the PBX
021* SD Memory Card
disconnected
• SD Memory Card not
installed
• Bad connection of SD
Memory Card
• SD Memory Card malfunction
• Main Board malfunction
022 Not enough free
space on SD card
• Not enough memory space
available to save the system
data, or to upload system files
from the KX-TAW848
Maintenance Console
• Delete the files whose file names start
with "$" from SD Memory Card
Note
Do not delete the "PSMPR" file; it is the
program file of the Main Board (MPR).
Error Code Error Message PROBABLE CAUSE SOLUTION