That would be determined by the device specs. Whoever installed it (ACA) should have that information.
As far as basic troubleshooting, start with a multimeter to confirm the device is getting power. Ground the black probe and touch the red probe to the spade the red wire is connected to. You should get 12v. Touch the red probe to the contacts inside the adapter and you should also get 12v.
As far as basic troubleshooting, start with a multimeter to confirm the device is getting power. Ground the black probe and touch the red probe to the spade the red wire is connected to. You should get 12v. Touch the red probe to the contacts inside the adapter and you should also get 12v.