Upon arrival, we found that the service valves were never opened allowing refrigerant to flow. We opened them and looked into the E0 code. This is a communication issue. We found that the inverter board is sending too much voltage to it. We compared the one that is working to the one that is not in our video. The inverter board has a faint shorted smell. We could not locate the model and serial for the outdoor unit but have a picture of some information for the inverter board for research. The unit is a Costway