Problem with Mitsubishi MELSERVO SA-202 Drive

I have 2 drives of MR-SA202 on one of our cylindrical grinders. The machine was relocated and re wired at the new place. The problem is that the motor is hunting and the drive trips with an error code#51.

I checked the phase sequence, and all standard parameters but the problem is as is.

Can you please help me with this?

Thanks in advance for your help.

what you means "new place" ?

Taken out from one facility and installed at another facility of the same company.

first i not familiar with this drive,

if you wiring correct,termination cable good,parameters same as before every thing like previous,

if you replace with new drive and the fault same,

the issue probably come from your incoming power supply,

problem at Pune the voltage not stable,