Minimum AC voltage for the 2000watt and 3000watt Aries models (AR-20AE, AR-20SE, AR-30AE and AR-30SE) is 160vac. Below this AC voltage level, the drive's firmware will have a low voltage fault. The AR-30 requires 3phase input. The AR-20 can be run with 1phase (single phase) or 3phase.
This info was in revision E of the user guide but removed at the request of Underwriter's Laboratory (UL).