What to do if the red 'LVD OPEN' LED is lit on Lucent Technologies Industrial Electrical?
- CcaseykarenAug 5, 2025
If the red 'LVD OPEN' LED is lit on your Lucent Technologies Industrial Electrical equipment, it could mean a few things. It might be due to plant voltage dropping below the disconnect threshold. Another possibility is a failed contactor, in which case you should refer to the 'LVD/R Contactor Replacement' procedure. Also, check the cable assembly from CP5 to the contactor (drawing T-82670-30) for any open circuits in the wiring that powers the contactor. Finally, it's possible that both redundant LVD sensing circuits have failed, requiring you to replace the CP5 circuit pack, following the 'LVD/Fuse Board (CP5) Replacement' procedure.