How To Troubleshoot an Inoperable APsystems
Microinverter
A flashing red LED indicates the AC grid is either not present or not within specification.
The microinverter does not sense that the utility grid is within voltage/frequency
specifications, and cannot produce power until this is resolved. To troubleshoot an
inoperable APsystems microinverter, follow the steps in the order shown to diagnose
your solar system.
* WARNING: Risk of electric shock. Always de-energize the AC branch circuit before
servicing. Never disconnect the DC connectors under load.
* WARNING: The APsystems Microinverters are powered by DC power from the PV
modules. Make sure you disconnect the DC connections and reconnect DC power and
then watch for three green blinks after connection to DC power.
Troubleshooting an APsystems System - 15 Steps:
1. Make sure AC breakers and disconnects are closed (off).
2. Check the connection to the utility grid and verify that the utility voltage is within
allowable ranges.
To Next Page
Need help?
General
