there is a process similar to the password recovery process on Cisco devices. I couldn't find it documented anywhere but Aruba support was able to get me in and i captured the console session for reference. You will lose any existing configuration and have to reprogram the device from scratch.
1) perform a boot break from the console port at 'Hit any key to stop autoboot:'
2) change the config file environment variable
setenv cfgfile default1.cfg
saveenv
3) issue the 'reset' command
4) reconfigure the device with the initial setup dialog, system will reboot when complete
5) perform a boot break at 'Hit any key to stop autoboot:'
6) unset the config file environment variable
setenv cfgfile
saveenv
7) issue the 'boot' command
8) login to device from console when prompted
9) issue 'write mem' command
i've attached the session capture for reference