Panasonic KX-TD500 Installation Manual page 245

5.2 Troubleshooting Guide
System Reset caused by CPU Runaway (Restart Procedure)
Error Code 1000 : Hard WDT overflow.
1001 : Illegal interrupt
1002 : Soft WDT overflow
1.
Possible cause of
the malfunction
2.
3.
4.
Countermeasures
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Note 1.
246
External circumstance, such as induction noise
Hardware is defective
The CPR software is terminated by executing illegal instruction.
The CPR software is terminated by executing infinite loop.
Does the trouble occur frequently?
Yes
Re-program the system programming data.
condition
Replace the CPU card*.
condition
Replace the TSW card.
condition
Remove the LPR cards one by one.
condition
condition
Consult the Service Center.
If a reset occurs 16 times/in one hour due to overflow of the watchdog timer,
the restart procedure is not activated and the system will be shut down. Press
the RESET button to restart the procedure.
*It is recommended to have a current copy of the program on disk to facilitate
accurate and rapid recovery.
Replace the Shelf.
End
No
OK
OK
OK
OK
OK
Troubleshooting