Arrive to home for an outage situation on the AC unit. Ran static pressure tests which were failing. Ran amps on the control board call for cooling was working. Moved to outside unit, compressor was cycling. Connected gauges system has no pressure and is void of all refrigerant. Alerted customer to this and authorized a leak search where we did find a massive leak in the evaporator coil. Reached out to supervisor due to ongoing issues with the system and the high static pressure.