Rtu was not working upon arrival. After further diagnostics I found that the high voltage fuses were blown, this was preventing the system from doing anything at all. I then found that the compressor has failed and is what caused the fuses to blow. With that being said we would have to replace the compressor and recharge the system with refrigerant, replace the high voltage fuses and then the motor booster as well. Once all of this has been completed then we can test the system out and check the operation. I will follow up later today on the cost to repair. I do highly recommend looking into replacing this unit to avoid any further issues or high costing repairs.