To determine the operation mode, check the status LED. The LED is visible through the cover of the QML data logger.
| LED | Operation mode | Notes |
|---|---|---|
| Flashes all the time | QML data logger has been reset but setup has not been examined yet. | – |
| Flashes once every 5 seconds | Setup is running without errors. | – |
| Flashes once every 10 seconds | Setup is interrupted due to an error. | A communication module is missing or there is no script in the \cfg directory. |
| Flashes quickly 2 times in a row | Setup is running but there are warnings. | The interval is 5 or 10 seconds, depending on if the script is running or not. |
| Flashes quickly 3 times in a row, then at 5‑second intervals | Setup is running but there are errors. | The interval is 5 or 10 seconds, depending on if the script is running or not. |
| LED is not on | None | Either there is no power in the QML data logger or there is a device failure. Check the power supply. |