NO-GRID Inverter Does Not Detect Grid

Fault Description

The fault NO-GRID is caused by the inverter not detecting voltage at the grid. 

Possible Solutions

  • The primary cause of the error is the grid code being set improperly. Typically this happens at the factory during the units "burn" in period. They are programmed with a specific grid code for the burn in process, right before they are shipped out the grid code is changed to their country of origin's grid standard. To learn how to change the grid standard go here: 

On the LCD proceed to the ADVANCED SETTING section. Enter the password 0010. Select “Turn Grid off or on”. Select off. Choose SELECT STANDARD select UL-240V-A, UL-208V-A, UL-240V, UL-240V. hit ENTER to confirm setting. Go back to Select “Turn Grid off or on”. Select on. Wait 5 minutes and the alarm should clear. 

US Grid Code Meaning

UL-240V-A - AFCI ENABLED - Split Phase

UL-208V-A - AFCI ENABLED - Single Phase

UL-240V -  AFCI DISABLED - Split Phase

UL-208V -  AFCI DISABLED - Single Phase


Test – DC switch OFF

• Check AC at the inverter test points

• L-L, L-GND

• Do NOT tell me 240VAC

• Check LCD reading, may be a bad

measurement circuit

Test – DC Switch ON

• Check grid standard

• Replace inverter

Victor is the author of this solution article.

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