A page fault (Exception 14) occurs when the page being requested has not been successfully loaded into memory. There are both healthy and unhealthy page faults:
Please refer following KB,
VMware KB: Understanding Exception 13 and Exception 14 purple diagnostic screen events in ESX 3.x/4....
Take a look at VMware KB: VMware ESXi 5.x host experiences a purple diagnostic screen mentioning E1000PollRxRing an... which explains the issue. I'd suggest you consider upgrading the host using HP's March 2015 image profile that you can download from https://my.vmware.com/web/vmware/details?downloadGroup=HP-ESXI-5.5.0U2-GA&productId=353.