SMA SC 500HE-US - Manual (Page 50)

8 Reactive Power Regulation SMA America, LLC
50 SC500HEUS-eng-BE-BUS120320 Operating Manual
8.2 Error Messages and Warnings for the Reactive Power Setpoint
The instantaneous value "Q-VArModFailStt" displays errors or warnings relating to the reactive power
setpoint.
• Display the instantaneous value " Q-VArModFailStt" on the Sunny WebBox user interface (see
section 6.1 "Displaying the Instantaneous Values", page 34).
Display Cause and corrective measures
"Off" No procedure for specifying the reactive power setpoint has been selected.
"Ok" A procedure for specifying the reactive power setpoint has been selected and there
are no errors.
"ComFail" The procedure "VArCtlCom" or "PFCtlCom" has been selected and the expected
signal with a valid reactive power setpoint has been absent for at least 5 minutes.
Corrective measures:
• Ensure that the Sunny WebBox and the Power Reducer Box can be accessed
via the Internet.
• Ensure that the Sunny WebBox is connected correctly.
• Ensure that the cabling between the Sunny WebBox and the inverter is OK.
"AnInFail" The procedure "VArCnstNomAnIn" or "PFCnstNomAnIn" has been selected and the
value measured at the analog input is less than 2mA.
Corrective measures:
• Ensure that the signal cable is correctly connected to the analog input.