RevPi AIO has 3 status LEDs. The signals have the following meaning:
| LED | Signal | Meaning |
| Power | on, green | A connection to RevPi base module has been established. |
| flashes, red | A connection to RevPi base module has not yet been established (initialisation phase). | |
| on, red | The connection to RevPi base module has been interrupted. Check to see if PiBridge has been plugged in properly. | |
| Out | off | A connection to RevPi base module has not yet been established (initialisation phase). |
| on, green | Outputs are ready for use. | |
| flashes, red | Range error. The RevPi base module values are too high or too low. | |
| on, red | Another fault. Check the output status in the process image. | |
| In | off | A connection to RevPi base module has not yet been established (initialisation phase). |
| on, green | Inputs are ready for use. | |
| flashes, red | Range error. A too high a voltage or too high a power supply at one or more inputs. Check the input status in the process image. |