Sungrow SG125HV/SG125HV-20 Error 009: Grid underfrequency

Solar inverter · taken from the manufacturer’s manual, pages cited

Fault code009

Grid underfrequency means the grid frequency is lower than the inverter's minimum acceptable limit. The manual's first action is: “set range.”

Model
Sungrow SG125HV/SG125HV-20
Display shows
Grid underfrequency (009)
Type
Fault code
Source
Manual p. 78

What 009 means

Grid underfrequency p. 78

Common causes

  • Grid frequency is lower than the lower limit of the inverter. p. 78

What to do

  1. set range. p. 78
  2. Check whether the protection parameters are appropriately set via the APP or the LCD. p. 78
  3. If the fault is not caused by the foregoing reasons and still exists, contact Sungrow Service. p. 78

Before you service the product, read the safety instructions in the manual p. 5.

If 009 is still not resolved

  • Refer Servicing To Qualified Service Personnel. p. 5
    “Refer Servicing To Qualified Service Personnel.”
  • Check user manual before service! p. 5
    “Check user manual before service!”
Open the manual at page 78 All SG125HV/SG125HV-20 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 009; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with Sungrow. Found a mistake? Report an error.