There isn't a list in the PCI-DSS of pre or pro-scribed settings, just this:
2.1.1
For wireless environments connected to the cardholder data
environment or transmitting cardholder data, change wireless
vendor defaults, including but not limited to default wireless encryption
keys, passwords, and SNMP community strings.
I don't know what Aruba's tool checks for, so I can't really tell you what else to look at.
So better go back and check that you're on WPA2 and using a good key.
Also move to SNMP3 with good keys if you haven't already.