Find the cause before the crew leaves the depot, so the right people take the right parts.
- Cable fault or failed lamp?: The pattern of dark lights tells you where to look.
- Voltage outside the window: Normal supply limits, and what to do outside them.
- When a controller stops reporting: No data is not the same as no light.
- Finding a cable fault: From “the cable is bad” to the point to dig.
- Earth leakage and electrical safety: A live pole is the most dangerous fault on the network.
- Theft and illegal connections: Signs in the data before someone reports it.