If a SmartLockPRO® GFCI is miswired during installation (line-load reversal), it cannot be reset, blocking delivery of power to its feed-through terminals and face. The GFCI is completely dead and the green LED will be ON to indicate a line-load reversal. Once the GFCI is wired properly and the unit can be reset,the LED acts as a power indicator that remains ON as long as the GFCI is operating correctly and providing power.
The SmartLockPRO® GFCI features Leviton’s unique patented lockout action as an end-of-life indication. If a SmartLockPRO® GFCI is damaged so that it cannot respond properly to a ground fault, Leviton’s SmartLockPRO® GFCI prevents reset.