--- title: Sapiens - How do you solve the error message “A60 inverted level inputs alarm”? description: A60 Inverted level input alarm warns that the board recognized the water through level electrodes in the wrong order. As a result the unit disables the boiler. 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[Home](https://support.lainox.com/en/knowledge) 2. [Sapiens](https://support.lainox.com/en/knowledge/sapiens) 3. [Messages](https://support.lainox.com/en/knowledge/sapiens#messages) # Sapiens - How do you solve the error message “A60 inverted level inputs alarm”? A60 Inverted level input alarm warns that the board recognized the water through level electrodes in the wrong order. As a result the unit disables the boiler. **This message requires the intervention of an authorized technician; causes of the fault must be investigated as per prescriptions.** ### Description The expansion detects the water on the level electrodes in the wrong order. ### Restore The error will automatically reset with the first successfull boiler flush. ### Checks Perform following checks: - Check the correct connection of the level electrodes: Emptying       L1 Minimum        L2 Max               L3 - Check for no limescale on probes. - Check boiler expansion card connections - [Naboo](https://support.lainox.com/en/knowledge/naboo#main-content) - [Installation](https://support.lainox.com/en/knowledge/naboo#installation) - [Use](https://support.lainox.com/en/knowledge/naboo#use) - [Messages](https://support.lainox.com/en/knowledge/naboo#messages) - [How to](https://support.lainox.com/en/knowledge/naboo#how-to) - [How it works](https://support.lainox.com/en/knowledge/naboo#how-it-works) - [Sapiens](https://support.lainox.com/en/knowledge/sapiens#main-content) - [Installation](https://support.lainox.com/en/knowledge/sapiens#installation) - [Use](https://support.lainox.com/en/knowledge/sapiens#use) - [Messages](https://support.lainox.com/en/knowledge/sapiens#messages) - [How to](https://support.lainox.com/en/knowledge/sapiens#how-to) - [How it works](https://support.lainox.com/en/knowledge/sapiens#how-it-works) - [Neo24hours](https://support.lainox.com/en/knowledge/neo24hours#main-content) - [Installation](https://support.lainox.com/en/knowledge/neo24hours#installation) - [Use](https://support.lainox.com/en/knowledge/neo24hours#use) - [Messages](https://support.lainox.com/en/knowledge/neo24hours#messages) - [How to](https://support.lainox.com/en/knowledge/neo24hours#how-to) - [How it works](https://support.lainox.com/en/knowledge/neo24hours#how-it-works) - [Oracle](https://support.lainox.com/en/knowledge/oracle#main-content) - [Installation](https://support.lainox.com/en/knowledge/oracle#installation) - [Use](https://support.lainox.com/en/knowledge/oracle#use) - [Messages](https://support.lainox.com/en/knowledge/oracle#messages) - [How to](https://support.lainox.com/en/knowledge/oracle#how-to) - [How it works](https://support.lainox.com/en/knowledge/oracle#how-it-works) - [Puff](https://support.lainox.com/en/knowledge/puff#main-content) - [Installation](https://support.lainox.com/en/knowledge/puff#installation) - [Use](https://support.lainox.com/en/knowledge/puff#use) - [Messages](https://support.lainox.com/en/knowledge/puff#messages) - [How to](https://support.lainox.com/en/knowledge/puff#how-to) - [How it works](https://support.lainox.com/en/knowledge/puff#how-it-works) - [Zoom](https://support.lainox.com/en/knowledge/zoom#main-content) - [Installation](https://support.lainox.com/en/knowledge/zoom#installation) - [Use](https://support.lainox.com/en/knowledge/zoom#use) - [Messages](https://support.lainox.com/en/knowledge/zoom#messages) - [How to](https://support.lainox.com/en/knowledge/zoom#how-to) - [How it works](https://support.lainox.com/en/knowledge/zoom#how-it-works) [![Chill listening crop-3](https://support.lainox.com/hs-fs/hubfs/LAINOX-1.png?width=88&height=24&name=LAINOX-1.png "Chill listening crop-3")](https://lainox.com/) Copyright © 2026, LAINOX Ali Group S.r.l. a Socio Unico