Pro Tip: Never swap the AC input wires with the DC output wires. Connecting 277V to the LED output side will instantly destroy the driver and possibly the LED array.
The internal power supply (driver) often burns out before the LEDs themselves. Photocell Issues: altair al-2161 led driver
Most original drivers are encased in black epoxy, making individual component repairs impossible; replacement of the entire driver unit is standard. Replacement and Retrofitting Pro Tip: Never swap the AC input wires
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