How do I fix Grid Sensor Error! / Fault Code (4)4 on a myenergi?

Check CT arrow — must point toward consumer unit (direction of import). CT must be on main grid incomer, upstream of ALL loads and ALL generation. Then: Check Zappi Linked Devices — only ONE CT set to GRID across entire installation. Remove any duplicate Grid CT assignments.

myenergi

ZP-017

Grid Sensor Error! / Fault Code (4)4

Grid CT incorrectly installed or reading incorrectly. Zappi cannot accurately measure grid import/export.

Common causes

CT arrow pointing wrong directionCT on wrong cable — not main grid incomerMore than one Grid CT set — conflictCT clipped around wrong conductors

What to check

STEP 1

Check CT arrow — must point toward consumer unit (direction of import). CT must be on main grid incomer, upstream of ALL loads and ALL generation.

STEP 2

Check Zappi Linked Devices — only ONE CT set to GRID across entire installation. Remove any duplicate Grid CT assignments.

Escalate if

CT correct direction, correct position, only one Grid CT, error persists — contact myenergi support

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