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Growatt · Growatt MOD TL3-X (three-phase grid inverter, 3–15 kW) · Operation

Growatt MOD: green and red LED, the display and what to tell service

Summary (editorial)

Green means normal operation, red means a fault with the message shown on the OLED screen. In weak or no sunlight the inverter disconnects automatically – this is normal.

✎ editorial – written from the cited sources, not a manufacturer statement. Status: draft.

From the manufacturer's documentation (English source wording, with page)

  1. Normal mode: the inverter converts the energy of the solar panels into AC power and exports to the grid, and the green LED will light up[1]
  2. When the DC voltage is lower than 140 V, the inverter will automatically disconnect from the grid and exit the normal operation mode; when conditions return to normal it will automatically connect to the grid[2]
  3. Failure mode: when the inverter monitors unexpected conditions such as system failure and inverter failure, the display will show the fault information, the indicator turns red and the output is disconnected from the grid[3]
  4. Shutdown mode: when the sunlight is weak or there is no sunlight, the inverter stops[4]
  5. Touch button: single touch – switch the display interface or current number plus 1; double touch – enter the setting state or confirm; triple touch – return to the previous display interface; long press for 5 s – the current data returns to the default value[5]
  6. When a malfunction occurs, an error message will be displayed on the OLED screen and the LED indicator red will light up[6]
  7. When contacting Growatt, provide: serial number, model, error message on OLED, a short description of the problem, grid voltage, DC input voltage, can you reproduce the failure, has this problem occurred in the past, what were the environmental conditions[7]

⚠ Work on refrigerant circuits, mains electricity and PV DC wiring is for qualified technicians only.

The Polish page has more detail (plain-language explanation, safe checks, guides): Read in Polish →

Sources

Every statement has a footnote to the document and PDF page. “Quote verified” means the quote was found automatically in the text of that page.

  1. [1] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 20 official manufacturer document quote verified and export to the grid, and the green mark describe explain led will light up.
  2. [2] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 20 official manufacturer document quote verified when the dc voltage is lower than 140v, the inverter will automatically disconnect
  3. [3] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 20 official manufacturer document quote verified the display will show the fault information.in the failure mode,
  4. [4] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 20 official manufacturer document quote verified when the sunlight is weak or there is no sunlight,the inverter
  5. [5] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 20 official manufacturer document quote verified enter the setting state or double touch
  6. [6] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified an error message will be displayed on the oled screen and the led indicator red will light up.
  7. [7] Installation & Operation Manual – MOD 3–15KTL3-X (GR-UM-212-A-05, AU ed. 2021-12) (GR-UM-212-A-05) , p. 25 official manufacturer document quote verified what were the environmental conditions when the problem occurred?