I don't believe there is a global command that you can run, however you can run this per AP.
(Aruba620) #show ap debug system-status ap-name AP225 | begin "Power Status"
Power Status
------------
Operational State POE-AF: One Ethernet port disabled; USB port disabled; 1x3 chain for 2.4GHz; 3x3 chain for 5GHz
----------------- -----------------------------------------------------------------------------------------------
Current HW State POE-AF: One Ethernet port disabled; USB port disabled; 1x3 chain for 2.4GHz; 3x3 chain for 5GHz
LLDP Negotiated POE Power 0.0W