© 2019 Hoymiles Converter Technology Co., Ltd. All rights reserved.
17
MI-500/MI-600/MI-700
6.2 Status LED Indicator
The LED flashes six times at start up. All green flashes indicate normal start up.
Flashing Slow Green
(
2s gap
): Producing power and communicating with DTU.
Flashing Fast Green (
4s gap
): Producing power and not communicating with DTU.
Flashing Red
(
1s gap
): Not producing power AC grid invalid (Voltage or frequency out of range).
Flashing Red (
always
): GFDI Fault.
The LED will remain red and the fault will continue to be reported
by the DTU.
6.3 On-site Inspection (For qualified installer only)
To troubleshoot an inoperable microinverter, follow the steps in the order shown.
1. Verify the utility voltage and frequency are within ranges shown in the in appendix Technical Data of
this microinverter.
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 watch for five short LED flashes.
3. 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.
4. Make sure that any AC breaker are functioning properly and are closed.
5. Check the DC connections between the microinverter and the PV module.
6. Verify the PV module DC voltage is within the allowable range shown in appendix Technical Data of
this manual.
7. If the problem persists, please call Hoymiles customer support.
Warning
Do not try to repair the microinverter. If the troubleshooting fails, please return it to the factory for
replacement.
Summary of Contents for MI-500
Page 1: ...Version B1 0 2019...
