How to display status for On, Off, Faulty

Question

I have a table which shows whether devices are ON or OFF.
Currently, it looks like this

Status	Name	Some other columns
🟢	DeviceA
🟢	DeviceB
🔴	DeviceC

There is a new requirement, which is to show devices which are FAULTY.
A faulty device can be ON or OFF.

The most straightforward solution would be to put the FAULTY label next to the ON/OFF icon, like so

Status	Name	Some other columns
🟢	DeviceA
🟢 FAULTY	DeviceB
🔴 FAULTY	DeviceC

However, I'm concerned about users confusing the 🔴 for FAULTY

Some possible alternatives I've considered:

• Spell out ON OFF instead of using 🟢🔴
• Make FAULTY its own column, instead of sharing a column with ON``OFF
• Find an appropriate icon for FAULTY & possibly HEALTHY

What would be the best solution?

Answer 1

As it is correlated with the function status: ON / OFF, it's a good choice to show both statuses close to each other as they both indicate the need for action.

But other than that, you should asses what kind of devices you are running, what the damage is when they run with faults or when they stop, how quick action is needed in order to signal, notify responsible people and make sure corrective measures are taken when needed.