--- title: "Troubleshooting: The Maxem Energy Controller has an error. What to do?" description: The Maxem Energy Controller has 5 led indicators. In this article we describe what the indicators mean and how to troubleshoot when there is a problem with the controller. --- [Skip to content](https://support.maxem.io/the-maxem-energy-controller-has-an-error.-what-to-do#main-content) - [English](https://support.maxem.io/the-maxem-energy-controller-has-an-error.-what-to-do) - [Nederlands](https://support.maxem.io/nl/the-maxem-energy-controller-has-an-error.-what-to-do-nl) English Show submenu for translations [![Logo-white](https://support.maxem.io/hs-fs/hubfs/Logo-white.png?width=230&height=37&name=Logo-white.png)](https://maxem.energy/) - Create support ticket Show submenu for Create support ticket - [Sales request](https://share-eu1.hsforms.com/2FZyysmEyRAKSZ2IKnHrf0Q2dyw99) - [Technical support](https://share-eu1.hsforms.com/26WB8z3cYTPWv02MIx6nr7w2dyw99) - [Finance support](https://share-eu1.hsforms.com/2mMsLOqRLQl2l8S6q3ZbgDA2dyw99) - [Report a bug](https://share-eu1.hsforms.com/220XTdV4ZQ726tz1CtoOw7A2dyw99) - [Feature request](https://share-eu1.hsforms.com/2g75JWLunRbqueEKBytvYvg2dyw99) Open main navigation Close main navigation - Create support ticket Show submenu for Create support ticket - [Sales request](https://share-eu1.hsforms.com/2FZyysmEyRAKSZ2IKnHrf0Q2dyw99) - [Technical support](https://share-eu1.hsforms.com/26WB8z3cYTPWv02MIx6nr7w2dyw99) - [Finance support](https://share-eu1.hsforms.com/2mMsLOqRLQl2l8S6q3ZbgDA2dyw99) - [Report a bug](https://share-eu1.hsforms.com/220XTdV4ZQ726tz1CtoOw7A2dyw99) - [Feature request](https://share-eu1.hsforms.com/2g75JWLunRbqueEKBytvYvg2dyw99) - - [English](https://support.maxem.io/the-maxem-energy-controller-has-an-error.-what-to-do) - [Nederlands](https://support.maxem.io/nl/the-maxem-energy-controller-has-an-error.-what-to-do-nl) English Show submenu for translations How can we help you? - There are no suggestions because the search field is empty. 1. [Maxem Knowledge Base](https://support.maxem.io/?hsLang=en) 2. [Products & Services](https://support.maxem.io/products-services?hsLang=en) 3. [Maxem Energy Controller](https://support.maxem.io/products-services?hsLang=en#maxem-energy-controller) March 24, 2026 # Troubleshooting: The Maxem Energy Controller has an error. What to do? The Maxem Energy Controller has 5 led indicators. In this article we describe what the indicators mean and how to troubleshoot when there is a problem with the controller. The Maxem controller requires a working internet connection with correct VPN settings to transmit the measurements. *(Note: led 4 and 5 are only for SCC controllers and home controllers. **Those indicators are not used for Localproxy controllers**)* ##### 1. No power ![](https://support.maxem.io/hs-fs/hubfs/image-png-Nov-10-2025-10-37-28-2304-AM.png?width=670&height=145&name=image-png-Nov-10-2025-10-37-28-2304-AM.png) 1. 1. LED is off. Check whether connected to power (wall outlet socket). ##### 2. Not online ![](https://support.maxem.io/hs-fs/hubfs/image-png-Nov-10-2025-10-39-48-4471-AM.png?width=670&height=178&name=image-png-Nov-10-2025-10-39-48-4471-AM.png) 1. 1. Check whether the controller is connected correctly to internet via 4g router / or regular internet line. 1. Led is orange: 1. connected via LAN port. Check if the connection has an internet connection by connecting the cable to your laptop. 2. The controller must dynamically receive an IP address from the on-site network via DHCP and the router must support MTU=1500, which indicates the packet size of the messages that should be able to be sent to our VPN server. 2. Led is red: check internet cable or router   ##### 3. VPN not connected ![](https://support.maxem.io/hs-fs/hubfs/image-png-Nov-24-2025-12-03-00-7622-PM.png?width=670&height=170&name=image-png-Nov-24-2025-12-03-00-7622-PM.png) 1. 1. Led is orange: Contact Maxem through a support ticket. 2. Led is red: check firewall settings:  1. The following network settings are required. Don’t be alarmed by the jargon, these are normal network settings. In corporate networks some options can be blocked. - - - - Maxem has to receive an IP address via DHCP. - This IP address may not be in the following range: 10.40.0.0/16, 10.41.0.0/16., and 192.168.25.1/24. - In case of a firewall outgoing traffic has to be allowed on the following ports: 853, 80, 123, 443, 1192 t/m 1200 en 9090. - The firewall must not contain DNS rebind protection.   ##### 4. No meter values *(Note: only for SCC controllers and home controllers. **Indicator 4 is not used for Localproxy controllers**)* ![](https://support.maxem.io/hs-fs/hubfs/image-png-Nov-24-2025-12-26-42-0984-PM.png?width=670&height=184&name=image-png-Nov-24-2025-12-26-42-0984-PM.png) 1. 1. Led is orange 1. The configuration is not complete. Go to http//install.maxem.io to reconfigure. 2. Led is red: Are meters connected in the right way?: 1. Check if TCP is correctly installed with unmanaged switch in ETH port 2. Is the RTU via RS1 port with 120 ohm resistance? 3. Are meters configured correctly in accordance to meter installation instructions? ##### 5. No connection with assets *(Note: only for SCC controllers en home controllers. **Indicator 5 is not used for Localproxy controllers**)* ![](https://support.maxem.io/hs-fs/hubfs/image-png-Nov-24-2025-12-31-23-2381-PM.png?width=670&height=183&name=image-png-Nov-24-2025-12-31-23-2381-PM.png) 1. 1. The configuration is not complete. Go to http//install.maxem.io to reconfigure. 2. Led is red, there is no communication with the charging stations: 1. check cabling to ethernet switch 2. The cables should not be longer than 100m 3. Does the asset have the correct backoffice url? ##### 6. 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