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Important Notification
GFDI fault
GFDI fault is defined as an unintentional, electrically conducting connection between an ungrounded conductor of
an electrical circuit and the normally non-current-carrying conductors, metallic enclosures, metallic raceways,
metallic equipment or earth. When a Ground fault occurs, the GFDI will trigger the LED light to flash in alternating
Orange and Red colour, and SM-MI-250 will automatically disconnect all the conductors as a safety precaution.
If GFDI has been detected, please contact with the installer and follow the
Operation Manual
to fix this situation.
Or you can contact with UBIQUITI customer support at [email protected].
Make sure that any upstream AC disconnects, as well as the dedicated circuit breakers for each AC branch circuit,
are functioning properly and are closed.
Verify the PV module DC voltage is within the allowable voltage and wattage range (refer Technical Specifications
on page 25.
Make sure DC wires of PV module are connected correctly with DC connectors of micro inverter.
If the problem persists, contact UBIQUITI Technical Support at [email protected].
Disconnecting a Micro Inverter
Ensure the micro inverter is
NOT
disconnected from the PV modules under load. Always disconnect all circuits to
the array before any work is done.
WARNING
Be aware that DC power/voltage is generated when the PV module is exposed to light.
Using a multi meter, verify that the DC conductors between the PV module and the micro inverter do not have any
current.
Disconnect the PV module from the micro inverter. To disconnect the micro inverter’s positive connector, squeeze
the locking mechanism and pull the connectors apart. The micro inverter’s negative connector is tool-removable
only.
