# Em24 disappears in device list and system goes in passthru mode **URL:** \ **Category:** DESS\ **Tags:** dess, victron\_community, cerbo\_gx, vrm, diy\ **Created:** [15 December 2024 14:39 UTC](https://community.victronenergy.com/t/em24-disappears-in-device-list-and-system-goes-in-passthru-mode/15486 "2024-12-15T14:39:24Z")\ **Posts on this page:** 1\ **Showing post:** 2
**Author:** ![robmeerwijk](https://avatars.discourse-cdn.com/v4/letter/r/3be4f8/32.png) [@robmeerwijk](https://community.victronenergy.com/u/robmeerwijk)\ **Post date:** [20 December 2024 00:18 UTC](https://community.victronenergy.com/t/em24-disappears-in-device-list-and-system-goes-in-passthru-mode/15486/2 "2024-12-20T00:18:29Z")
Hi, I have a very similar problem with my CG EM340. Except that my grid meter returns within a few seconds and my meter is connect via USB-modbus. Could you take a look and see if you find an error message in “Console | Services | Modbus/TCP”? > [@External grid meter dissappears frequently while charging causing Passthru mode](https://community.victronenergy.com/t/external-grid-meter-dissappears-frequently-while-charging-causing-passthru-mode/15981/1): > > During charging my 3-phase MPII 5000 system switches frequently to Passthru mode. There seems to be a relation between SoC and occurances. This starts to happen more often when the SoC increases. It can happen as often as 30 times per charging cycle. When debugging this issue I used Node-RED for alarming me. I found that it happens when the connection with my external Grid Meter is lost. This is a CG-EM340. The grid meter works fine otherwise. So I made an alarm in Node-RED for a frozen power … --- _[View the full topic](https://community.victronenergy.com/t/em24-disappears-in-device-list-and-system-goes-in-passthru-mode/15486)._