APsystems Microinverter QT2 Installation manual
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6. Troubleshooting
Qualified personnel can use the following troubleshooting steps if the PV system does not operate correctly:
6.1 Status Indications and Error Reporting
Assuming they are easily accessible and visible, Operation LEDs can give a good indication of the microinverters
status
6.1.1 Start up LED
Ten short green blinks when DC power is first applied to the Microinverter indicates a successful
Microinverter startup.
6.1.2 Operation LED
Flashing Slow Green (5 sec. gap)
- Producing power and communicating with ECU
Flashing Slow Red (5 sec. gap)
- Not producing power
Flashing Fast Green (2 sec. gap) -
Not communicating with ECU over 60mins, but still producing power.
Flashing Fast Red (2 sec. gap) -
Not communicating with ECU over 60mins and not producing power.
Steady Red
– default, DC side ground fault protection, see 6.1.3
6.1.3 GFDI Error
A solid red LED indicates the Microinverter has detected a Ground Fault Detector Interrupter (GFDI) error in
the PV system. Unless the GFDI error has been cleared, the LED will remain red and the ECU will keep
reporting the fault. Please contact your local APsystems Technical Support.
6.2 ECU_APP
APsystems ECU_APP (available in the EMA Manager APP) is the recommended tool to do on-site troubleshooting.
When connecting the ECU_APP to the ECU hotspot (please check ECU User Manual for more detailed
information), installer can check every microinverter status (production, communication) but also ZigBee signal
strength, grid profile and other insightful data helping the troubleshooting.
6.3 Installer EMA (web portal or EMA Manager APP)
Before going on site for troubleshooting, installer can also check all information remotely using his installer
account, either on the web or using the EMA Manager APP (see EMA Manager APP User Manual for more
detailed information). Having access to module data (DC, AC, voltages and currents) gives the first indication on
potential issues.
6.4 Trouble Shooting Guide
Professional installers can also refer to our Troubleshooting Guide
(
https://aunz.apsystems.com/resources/library/
, section libraries) to have more in depth guideline on how to
troubleshoot and fix PV installations powered by APsystems microinverters.
