Sungrow SG125HV/SG125HV-20 Error 078-081: PVx abnormal

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

Fault code078-081

PVx abnormal means there is an issue with the xth solar panel string, possibly due to improper connection or disconnection. The manual's first action is: “1. Check if the xth PV string needs to be connected. If not, ignore the alarm; and If so, check the connection status and make sure it is connected reliably.”

Model
Sungrow SG125HV/SG125HV-20
Display shows
PVx abnormal (078-081)
Type
Fault code
Source
Manual p. 83

What 078-081 means

PVx abnormal p. 83

What to do

  1. 1. Check if the xth PV string needs to be connected. If not, ignore the alarm; and If so, check the connection status and make sure it is connected reliably. p. 83
  2. 2. Check if the xth DC fuse is damaged. If so, replace the fuse. p. 83
  3. 3.If the fault is not caused by the foregoing reasons and still exists, contact Sungrow Service. p. 83

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

If 078-081 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 83 All SG125HV/SG125HV-20 error codes Manual details & download

This page summarises what the manufacturer’s manual says about 078-081; 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.