1. Measure to ensure mains AC input voltages are within specification.2. Ensure the neutral wire is firmly connected to the plan grid and isnot “floating”.2.1 Verify grounding bus bar MDB is integrated to ground site.2.2 Verify that all AC cable wiring uses the correct color coding.2.3 Verify that the Neutral cable is firmly terminated to the plan supply.2.4 AC Input voltage measurements: Line – Neutral (180Vac – 250Vac) Neutral to Ground (