[bryanbdp]

Hi. I recently purchased this 1989 MC-4VA and have run into an issue with the X axis.
On startup, it shows the error code 201-X Alarm A Servo Amp 2E6 on the X axis.
It tripped the breaker on the board one time, but not always.
We used a megger to check the motor windings and wiring, but it tested fine.
I am getting an error LED as shown on the drive.
Can anyone tell me what this alarm code and LED means and how to troubleshoot?
Many thanks!!!

Attachment 493730
Attachment 493732

[cncmakers001]

Hi. I recently purchased this 1989 MC-4VA and have run into an issue with the X axis.
On startup, it shows the error code 201-X Alarm A Servo Amp 2E6 on the X axis.
It tripped the breaker on the board one time, but not always.
We used a megger to check the motor windings and wiring, but it tested fine.
I am getting an error LED as shown on the drive.
Can anyone tell me what this alarm code and LED means and how to troubleshoot?
Many thanks!!!

Attachment 493730
Attachment 493732

The X axis servo driver should be broken.
You can swap a driver from other axis to confirm it.

[GuntisK]

As previously mentioned problem is with X axis servo driver. On BL-D**A board I see that red "VR" LED is lit on- from manuals it means that there is a problem with SVC-A board (top one). First check if the fuses are ok (they are located near connectors CN2 and CN3). If they are burnt it could be a sign that base unit transistor drivers are bad and should be replaced. Another things to check- base unit transistor module, and all electrolythic capacitors on driver.