9 Troubleshooting RJ-901C/RJ-900C 　 Maintenance Manual
9-18
NOTE
• The square bracket pair in a message may contain the applicable command code.
• For the PC settings, refer to your PC's operation manual.
9.2.5 Errors Requiring Reboot
This section describes the contents of reboot-requiring errors as well as the check items and recovery actions.
These errors are issued when any of the following critical problems occurs.
• Obstacle that prevents the machine's operation
• Damage of electric circuits (boards, motors, sensors)
• Abnormal operation of control programs
When any of the above conditions occurs, the machine follows the steps shown below before stopping its
operation.
1. Turn OFF the driving system power automatically.
2. Flash all lamps in the operation panel and generate intermittent audible alarm.
3. Display the applicable error message on the LCD.
The error can be cancelled by removing the error causes and restarting the machine.
(1) CPU system serious error
Table 9-6 Symptoms and Check Items for CPU System Serious Errors
No. Message Event/
symptom
Check item Action Reference
1 E 001 error
DRAM
Standard
DRAM error:
Abnormal
condition in
standard
memory
mounted on
main board
assembly
Main board assembly
may be defective.
Replace main board
assembly.
"4.3.3
Replacing
Main Board
Assembly"
p.4-21
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