> For the complete documentation index, see [llms.txt](https://docs.revrobotics.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.revrobotics.com/ion-control/pdh/status-led.md).

# Power Distribution Hub Status LED Patterns

{% hint style="info" %}
These led patterns only apply to firmware version 21.1.7 and later
{% endhint %}

## General Status LED

<table><thead><tr><th>LED Status</th><th width="232">LED Description</th><th width="126">When</th><th>Hub Status</th></tr></thead><tbody><tr><td><img src="/files/bHi7kdWOlH5qKlwyGofG" alt="" data-size="line"></td><td>Blue Solid</td><td>Anytime</td><td>Device on but no communication established</td></tr><tr><td><img src="/files/otQbRiBvjSHuuMB5TIjU" alt="" data-size="line"></td><td>Green Solid</td><td>Anytime</td><td>Main Communication with roboRIO established</td></tr><tr><td><img src="/files/NHsBCz79Mn71sqgCv9HZ" alt="" data-size="line"></td><td>Magenta Blinking</td><td>Anytime</td><td>Keep Alive Timeout</td></tr><tr><td><img src="/files/XDJWbxJhkZIWLbO67cvB" alt="" data-size="line"></td><td>Solid Cyan</td><td>Anytime</td><td>Secondary Heartbeat (Connected to REV Hardware Client)</td></tr><tr><td><img src="/files/jW7yqlQgUJjgwnVC1qdx" alt="" data-size="line"></td><td>Orange/Blue Blinking</td><td>Anytime</td><td>Low Battery</td></tr><tr><td><img src="/files/P4kLmvIjgXhybKif45TJ" alt="" data-size="line"></td><td>Orange/Yellow Blinking</td><td>Anytime</td><td>CAN Fault</td></tr><tr><td><img src="/files/XuvnoA1d5hjoKf0fuDVS" alt="" data-size="line"></td><td>Orange/Cyan Blinking</td><td>Anytime</td><td>Hardware Fault</td></tr><tr><td><img src="/files/vRGqfI4IcXyEKYmLYdQG" alt="" data-size="line"></td><td>Orange/Magenta Blinking</td><td>Anytime</td><td>Device Over Current</td></tr></tbody></table>

### Channel Status LED

<table><thead><tr><th>LED Status</th><th width="175">LED Description</th><th width="138">When</th><th>Component Status</th></tr></thead><tbody><tr><td><img src="/files/tjlCcwsHvsm1L3Xfb8Kx" alt="" data-size="line"></td><td>LED off</td><td>Anytime</td><td>Channel has voltage and is operating as expected</td></tr><tr><td><img src="/files/vF4Tz1S5AlgStIMnT8dK" alt="" data-size="line"></td><td>Red Solid</td><td>Anytime</td><td>Channel has NO voltage and there is an active fault. Check for tripped or missing circuit breaker</td></tr><tr><td><img src="/files/pRoI2VRZkEM3I5Nu2k5j" alt="" data-size="line"></td><td>Red Blink</td><td>Anytime</td><td>Sticky fault on the channel. Check for tripped circuit breaker. </td></tr></tbody></table>

{% hint style="success" %}
**Sticky Fault** - an indicator that a fault has occurred that will stay until the indicator has been cleared manually.&#x20;
{% endhint %}

### Switched Channel LED

<table><thead><tr><th>LED Status</th><th width="182">LED Description</th><th width="140">When</th><th>Component Status</th></tr></thead><tbody><tr><td><img src="/files/LJ3RyKZiv36XSFakxV0R" alt="" data-size="line"></td><td>LED off</td><td>Anytime</td><td>Channel has voltage and is operating as expected</td></tr><tr><td><img src="/files/PqYI4M00MPFXAcoIVAwU" alt="" data-size="line"></td><td>Red Solid</td><td>Anytime</td><td>Channel has NO voltage and there is an active fault. Check for blown or missing fuse</td></tr><tr><td><img src="/files/Pju4J32rWQ6VdoJ5kySw" alt="" data-size="line"></td><td>Red Blink</td><td>Anytime</td><td>Sticky fault on the channel. Check for blown fuse</td></tr></tbody></table>