APsystems YC1000-3 Installation/User Manual
16
Troubleshooting
Troubleshooting a non-operating APsystems Microinverter
To troubleshoot a non-operating APsystems Microinverter, Follow the steps
below in order:
1.
Verify the utility voltage and frequency are within ranges shown in the Technical Data
section of this manual.
2.
Check the connection to the utility grid. Verify utility power is present at the inverter
in question by removing AC, then DC power. Never disconnect the DC wires while
the microinverter is producing power. Re-connect the DC module connectors and
3.
watch for three short LED flashes.
4.
Check the AC branch circuit interconnection between all the microinverters. Verify
each inverter is energized by the utility grid as described in the previous step.
5.
Make sure that any AC breaker are functioning properly and are closed.
6.
Check the DC connections between the microinverter and the PV module.
7.
Verify the PV module DC voltage is within the allowable range shown in the Technical
Data of this manual.
8.
If the problem persists, please call APsystems Technical Support.
Do not attempt to repair the APsystems microinverter. If troubleshooting methods fail,
please call APsystems Customer Support.
