| Problem | Possible cause | Solution |
|---|---|---|
| Green status LED is flashing. | DGA monitor is in standby mode. | Start the measurement mode. See Starting measurement. |
| Yellow status LED is lit. | A device warning is active. | Log in to the user interface. Check system status and active alerts. See sections System statuses and Device alerts. |
| DGA monitor has been installed but not initialized. | Perform commissioning and initialization according to the OPT100 Installation Guide (M211857EN). | |
| DGA monitor has been uninstalled. | Confirm the cause from the user interface. | |
| Yellow status LED is flashing. | Gas level alert is active, caution limit exceeded. | Log in to the user interface. Check gas levels and active alerts. |
| Red status LED is lit. | A device error is active. | Log in to the user interface. Check system status and active alerts. See sections System statuses and Device alerts. |
| Red status LED is flashing. | Gas level alert is active, alarm limit exceeded. | Log in to the user interface. Check gas levels and active alerts. |
| Data missing in measurement view (gaps in graphs) | Measurement cycles have not produced reliable results for some or all measurement parameters. | Can be caused by rapid temperature changes. Make sure the DGA monitor doors are closed and locked. See Notes for normal operation. |
| DGA monitor has been in standby mode or turned off. | Keep the DGA monitor powered on and in measurement mode. | |
| My web browser warns me that the connection is not secure when connecting to the user interface. | User interface is secured using a self-signed certificate that is not trusted by your web browser, because the certificate is not publicly distributed. | To get rid of the warning permanently, create a trusted certificate
and key and configure the user interface security to use them (recommended) or disable
HTTPS security (not recommended). See Configuring user interface security. Alternatively, you can ignore the warning and proceed to the user interface. HTTPS traffic is always encrypted even if the certificate is not trusted. |
| I am unable to log in to the user interface as Admin user. | Forgotten password. | Contact Vaisala. See Technical support. |
| DGA monitor LED lights are off. | Issue with the power supply. | Check power input from the power supply unit (switches F1 and S1). |
| Oil is leaking from inside the DGA monitor or the connecting pipes. | Loose connection or faulty piping. | Tighten any loose connections. If there is still leakage, stop measurement and complete uninstallation procedure before maintenance. If maintenance work cannot be started immediately, close transformer valves to prevent more oil leaking into the system. |
| There is water inside the DGA monitor. | Faulty cabinet or cabinet door left open. | Dry with rags or if necessary, drain the liquid out by opening a connector at the bottom of the DGA monitor (Spare, item 8; see OPT100 cable glands and connectors). Remove the cables or black plug to drain the liquid out. Reinstall cables or plug after draining. |