Technical data

M250 Installation and Operation
 2013 Enphase Energy Inc. 141-00022 Rev 01
23
9. Disconnect and re-connect the DC PV module connectors. The Status LED of each
microinverter will light solid green a few seconds after connection to DC power and then blink
green six times to indicate normal start-up operation about two minutes after connecting to
DC power. The LED subsequently resumes normal operation if the grid is present. See page
21 for normal LED operation.
10. Attach an ammeter clamp to one conductor of the DC cables from the PV module to
measure microinverter current. This will be under one Amp if AC is disconnected.
11. Verify the PV module DC voltage is within the allowable range shown in the Technical Data
section on page 29 of this manual.
12. Swap DC leads with a known good, adjacent PV module. If after checking Enlighten
periodically (this may take up to 30 minutes), the problem moves to the adjacent module, this
indicates that the PV module isn’t functioning correctly. If it stays in place, the problem is with
the microinverter. Call Enphase Customer Support for help in reading the microinverter data
and for help in obtaining a replacement microinverter, if needed.
13. Check the DC connections between the microinverter and the PV module. The connection
may need to be tightened or reseated. If the connection is worn or damaged, it may need
replacement.
14. Verify with your utility that line frequency is within range.
15. If the problem persists, contact Customer Support at [e-mail].