| Warning Do not substitute parts or modify the system, or install unsuitable parts in the system. Improper modification can damage the product or lead to malfunction. |
| Warning Do not open the power supply unit. There are no user-serviceable parts inside the unit. If the power supply unit is faulty, replace it. |
| CAUTION Contact Vaisala or its authorized representative for repairs. |
| CAUTION Improper modification can damage the product or lead to malfunction. Any modification voids your warranty. |
| CAUTION Only qualified maintenance personnel may perform maintenance procedures. |
In general, RSI51 needs very little maintenance. However, it is important to keep the unit clean and regularly check that all parts are in good condition and properly attached.