Troubleshooting
10.  Troubleshooting
LED Indicator (Green/Red)
Green   - ON: Operating
    Blinking: Countdown
Red   - ON: Error/Fault
    Blinking: Warning
Figure 10.6.:  LED Indicator
Message Red LED 
on
Red LED 
blinks
Solution
Errors
AC Freq High X  ► Check grid frequency on the inverter 
terminal
 ► Check the country setting
AC Freq Low X  ► Check grid frequency on the inverter 
terminal
 ► Check the country setting
Grid Quality X  ► Check the harmonics of the grid  
voltage
 ► Grid connection of the inverter may 
need to be further away from a non-
linear load.