APsystems QS1 - 6. Troubleshooting; 6.1 Status Indications and Error Reporting

QS1 Installation/User 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
6.1.1 Start up LED
When the 1st PV module is connected to the microinverter, the LED flashes once red, then 3
times green quickly. This indicates correct operation.
6.1.2 Operation LED
Flashing Slow Green (10 sec. gap) - Producing power and communicating with ECU
Flashing Fast Green (2 sec. gap) - Producing power and not communicating with ECU
over 60mins
Flashing Red
- Not producing power
Steady Red - Electrode assembly
6.1.3 GFDI Error
A solid red LED indicates the Microinverter has detected a Ground Fault in the PV
system(GFDI alarm).Until the GFDI alarm has been cleared, the LED will remain red and
the ECU will keep reporting the fault.After the ground fault is fixed, follow the instructions
in the ECU Installation and Operation Manual to clear this GFDI error reporting.
6.1.4 Other Faults
All other faults are reported to the ECU. Refer to the ECU Installation and Operation
Manual for a list of additional faults and troubleshooting procedures.
Only qualified personnel should directly handle the APsystems microinverter.
1
. Never disconnect the DC wire connectors under load. Ensure that no current
is flowing in the DC wires prior to disconnecting.
2
. Always disconnect AC power before disconnecting the PV module wires from
the APsystems Microinverter.
3 . The APsystems microinverter is powered by DC current of the PV module.
After reconnecting DC, please check that the LED behaves as in 6.1.1 above.