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How to resolve the error "I2C communication error" on the HMIG5U/HMIG5U2?

Published date: 01 August 2019

Issue:
When powering up the HMIG5U/HMIG5U2, there is an error at the bottom of the screen (when the Schneider Electric logo is displayed) that states "I2C communication error".

Product Line:
HMIG5U, HMIG5U2

Resolution:
The "I2C communication error" appears when the connection from the HMIDT to the HMIG5U/HMIG5U2 is distorted or bad. Check the pins on the back of the HMIDT and the pins on the HMIG5U/HMIG5U2 to ensure there is no rust, corrosion or bent pins.

Removing and reattaching the screen usually resolves this issue.
 

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