APsystems error codes explained
What 6 APsystems inverter fault and error codes mean, in plain English, with safe checks you can do and when to call a licensed electrician.
Safety first: never open the switchboard, remove covers, or pull apart or disconnect the inverter, batteries, isolators or wiring. Only use the switches and buttons described here. Anything else must be done by a licensed electrician. Call 1300 209 503 or book a service request.
| Code | Message & meaning |
|---|---|
| LED ten short green blinksInfo |
Successful start-upTen short green blinks when DC power is first applied indicate a successful microinverter start-up. What you can do
DS3 / DS3-S / DS3-L microinverters (APAC) · Guide only. All work must be done by a licensed electrician. |
| LED flashing slow greenInfo |
Producing and communicatingFlashing slow green (5 s gap): producing power and communicating with the ECU. What you can do
DS3 / DS3-S / DS3-L microinverters (APAC) · Guide only. All work must be done by a licensed electrician. |
| LED flashing slow redWarning |
Not producing powerFlashing slow red (5 s gap): the microinverter is not producing power. What you can do
DS3 / DS3-S / DS3-L microinverters (APAC) · Guide only. All work must be done by a licensed electrician. |
| LED flashing fast greenWarning |
No ECU communication, still producingFlashing fast green (2 s gap): not communicating with the ECU for over 60 minutes, but still producing power. What you can do
DS3 / DS3-S / DS3-L microinverters (APAC) · Guide only. All work must be done by a licensed electrician. |
| LED flashing fast redFault |
No ECU communication and not producingFlashing fast red (2 s gap): not communicating with the ECU for over 60 minutes and not producing power. What you can do
DS3 / DS3-S / DS3-L microinverters (APAC) · Guide only. All work must be done by a licensed electrician. |
| LED steady redCritical |
GFDI error (DC ground fault protection)A solid red LED means the microinverter detected a Ground Fault Detector Interrupter (GFDI) error in the PV system. The LED stays red and the ECU keeps reporting it until cleared. What you can do
DS3 / DS3-S / DS3-L microinverters (APAC) · Guide only. All work must be done by a licensed electrician. |
No codes match. Try fewer characters, or ask us.
Common APsystems questions
What does APsystems LED flashing fast red "No ECU communication and not producing" mean?
Flashing fast red (2 s gap): not communicating with the ECU for over 60 minutes and not producing power. Check that your home Wi-Fi/internet is working and restart your router This is a guide only; any electrical work must be done by a licensed electrician.
What does APsystems LED ten short green blinks "Successful start-up" mean?
Ten short green blinks when DC power is first applied indicate a successful microinverter start-up. No action needed - this is a status message, not a fault This is a guide only; any electrical work must be done by a licensed electrician.
What does APsystems LED flashing slow green "Producing and communicating" mean?
Flashing slow green (5 s gap): producing power and communicating with the ECU. No action needed - this is a status message, not a fault This is a guide only; any electrical work must be done by a licensed electrician.
What does APsystems LED flashing slow red "Not producing power" mean?
Flashing slow red (5 s gap): the microinverter is not producing power. Check whether the rest of your house or street has power, and check your network operator's outage map This is a guide only; any electrical work must be done by a licensed electrician.
What does APsystems LED flashing fast green "No ECU communication, still producing" mean?
Flashing fast green (2 s gap): not communicating with the ECU for over 60 minutes, but still producing power. Check that your home Wi-Fi/internet is working and restart your router This is a guide only; any electrical work must be done by a licensed electrician.
Need help with this fault?
Get a licensed electrician to call you back.
Total Solar can help: our licensed electricians install and service systems. Based in Ellenbrook, WA, with Victoria and Queensland also available.
Or call 1300 209 503
Sources
Meanings are summarised from these manufacturer documents. Check your own model's manual, as codes vary between models and firmware versions.
APsystems is a trademark of its owner. Total Solar is not affiliated with the manufacturer unless stated. All fault code guides