PUS status changed cause stack member reboot

[acmesupport]

Dear ALL,

I'm troubleshooting the ICX stack switch, i found the active member's PUS status changed, the other stack member will reboot, anyone can correct me?

Support

[BenBeck]

Hey @acmesupport 

We cannot allow such links on a public forum. Please open a support case to get official assistance on this item. Or feel free to paste any output and we will give best-effort help here. 

[acmesupport]

I got the smiliar several logs, the unit 1's PSU1 are connected to Mains Electricity, the PSU2 are connected to  UPS.