myenergi zappi [Comms Fault]

Comms Fault, fault code 26, sounds like a Wi-Fi problem and is not one. The comms in question are internal: myenergi define the code as the zappi having detected an issue with the built-in protection components, meaning the main controller and the separate protection board that watches for residual current and checks the earth are no longer agreeing with each other. The zappi treats that as a reason not to charge, because it cannot prove the protection is listening.

The published action is to unplug the EV and press and hold the button to reset the unit, and a single occurrence after a power cut or a firmware update is worth exactly that one reset. What it is not worth is a second and third. A protection board that has stopped responding is a component failure, and the closing line of myenergi’s table applies: if the fault persists, stop using the zappi and contact your supplier or myenergi technical support.

Nothing about this code touches the house wiring, the earth or the supply, so an electrician cannot fix it from outside the unit, and the warranty position is the first thing to establish. It sits in a family with 27, where the same components fail their pre-charge test, and 28, where the main relay has welded; all three are the charger reporting on its own safety hardware.