Storm-Damaged Lighting Controls Repaired with WattStopper Power Supply Replacement

A storm hit and took out the entire lighting control system at this facility. Not just one switch - sensors, controlled outlets, and wall stations all went down at once. That kind of widespread failure usually points to one thing: a dead power supply feeding the whole system.

We traced the problem to a failed WattStopper P115/277 power supply. That unit is the backbone of WattStopper LI and LMCP series lighting control panels - when it fails, everything downstream fails with it. Pulling it out and getting eyes on it confirmed the issue. Once we had the new unit in hand, the path forward was clear.

The control panel itself - a fully loaded board with Legrand modules, Lutron power supplies, and multiple zone controllers - was intact. That's actually good news in a situation like this. It means the surge hit the power supply hard enough to take it out before it could cascade further into the system. A failed power supply is a much easier fix than a fried control board.

With the new WattStopper power supply installed, the whole system came back online. Sensors started communicating, wall switches lit up, and controlled outlets were back in service. The Legrand LMCT-100-2 commissioning tool we had on hand let us verify everything was talking correctly before we wrapped up. No guessing - just confirmed operation across the board.

Storm damage to commercial lighting control systems is something a lot of building managers don't think about until it happens. These systems are more vulnerable than people realize. If your building's lighting controls are acting up after a storm, it's worth getting someone who actually knows these systems to dig in - not just a general electrician swapping breakers.