PowerEdge R420 has issue: "System board 1 riser config err 0 config error out of 434 sensors"

Hi all,

My server has deployed VMware  ESXi 5.5.0 and has alert as title:

""System board 1 riser config err 0 config error out of 434 sensors"

I performed some workarounds  but the issue still happens:

+Clearing alert/log from iDRAC then rebooting server

+Disable iDRAC

Could you please help me to cover this problem?

Thanks in advance,

Nhan