# System Errors

There are a couple of station errors which can happen during the execution of a test. The so called **system errors** are treated like [limit errors](/ltt/documentation/ltt-gui-manual/teststand/limittests.md) and have error numbers < 50.

{% hint style="warning" %}
Do not provide error numbers < 50 for your limit tests.
{% endhint %}

| Error Number | Meaning                                                            |
| ------------ | ------------------------------------------------------------------ |
| 0            | System error.                                                      |
| 5            | Power supply voltage limit error.                                  |
| 6            | Power supply current limit error.                                  |
| 9            | Temperature sensor limit error.                                    |
| 13           | Power fail error. Happens in case of an overall LTT power failure. |
| 16           | Power supply communication error.                                  |
| 18           | Temperature sensor communication error.                            |

Like with limit errors, you can set the error tolerance in [F6 dialog](/ltt/documentation/ltt-gui-manual/lttgui/dialogs/f6errorconfiguration.md).


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