SMA SI 5048 - Troubleshooting

Troubleshooting SMA Solar Technology AG
198 SI5048-TEN093630 Technical Description
20.9 Troubleshooting
Answers are provided below for faults that may occur in practice:
Why does the Sunny Island not connect to the running generator?
• Is the fuse on the generator ok?
• Has the power which is allowed to be fed back into the generator during the permissible time
been exceeded ("233.14 GnRvTm" parameter)? If yes, "!" appears on the display. Generator
connection is blocked for the set time. Set the "540.02 GnAck" parameter to Ackn.
• If the generator control relay (GnReq) is open has the generator been started manually
("234.07 GnStrMod" parameter)? Change the setting to autostart, if required.
• Is a GenMan used in the system?
– Check the return signal (DigIn)
– The generator can only be started using GenMan.
Why is the display of the Sunny Island dark and why is nothing shown on the
display?
• Is the DC circuit breaker on the Sunny Island set to "On"? In this case, the device has switched
off to protect the battery against deep discharge (see also section 13.3”State of Charge /
SOC and SOH” (page93)). To restart the Sunny Island, see section 9.5”Reactivating the
Device Following Automatic Shutdown” (page63).
• The external battery fuse may have been triggered.
Why is it not possible to change parameters?
• Has the installer password been entered correctly? Check whether you are actually in "Installer
Level" (see section 10.5”Entering the installer password” (page73)). If necessary, repeat the
calculation and entry of the password.
• You are in the "100-Meters" (measuring data) menu or the "300-Diagnose" (diagnosis) menu.
You can only read the data values shown here.
• Some parameters can only be changed in standby mode or in the QCG (see for example the
parameter "234.07 GnStrMod" in chapter 19.2”Adjustable parameters” (page147)). Stop
the Sunny Island as described in section 9.2”Stopping the Sunny Island (Standby)” (page61).
Note that this causes a dropout in the stand-alone grid and the loads are no longer supplied.
Why does the Sunny Island connect to the running generator only for a short
time?
• The limits for the maximum permissible AC voltage or the minimum permissible frequency of the
generator are too strict (parameter in the menu "233# Generator Control"). Change voltage
and/or frequency limits while observing the technical data for your generator.