VNXe 3150 LCC Replacement

I had an LCC on SP-B go bad, EMC sent me the new part. I found replacement instructions online, and it tells me to put SP-B into service mode, replace the LCC, take it out of service mode and reboot the SP. I assume during this entire process, the SAN will still be communicating with my VMs over SP-A, and at no time *should* this process cause the SAN as a whole to reboot? Ultimately, I want to know if this is safe to do during business hours?