Mitsubishi Electric Melservo-J4 MR-J4-DU*B4-RJ100 Series, Instruction Manual

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6 TROUBLESHOOTING
6.1 Troubleshooting for MR-CV_ power regeneration converter unit
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TROUBLESHOOTING
• The forced stop deceleration does not function for alarms not subject to the forced stop deceleration
function.
For parallel drive systems, if [AL. 34 SSCNET receive error 1] or [AL. 36 SSCNET receive error 2] occurs, the servo motor
stops with the dynamic brake (DB), not with forced stop deceleration (SD).
6.1
Troubleshooting for MR-CV_ power regeneration
converter unit
When an alarm or warning is displayed, refer to "MELSERVO-J4 Servo Amplifier Instruction Manual (Troubleshooting)" to
remove the failure.

MELSERVO-J4 Servo Amplifier Instruction Manual (Troubleshooting)
When an alarm occurs, ALM (Malfunction) will turn off.
Explanation for the lists
No./Name
Indicates each No./Name of alarms or warnings.
Alarm deactivation
After the cause of the alarm has been removed, the alarm can be deactivated by any of the methods marked  in the alarm
deactivation column. Warnings are automatically canceled after the cause of occurrence is removed. Alarms are deactivated
by alarm reset, CPU reset, or power cycling.
*1 Deactivate the alarm in servo-off status. If the alarm is deactivated in servo-on status, [AL. 1B Converter error] will occur.
*2 If the protection coordination cable is not connected, the alarm cannot be deactivated by CPU reset.
Alarm deactivation Explanation
Alarm reset 1. Turn on RES (Reset) with an input device.
*1
2. Input the servo-on command for the drive unit connected with the protection coordination cable.
CPU reset Reset the controller itself.
*2
Power cycling Turn the power off and on again.