20 Troubleshooting SMA America, LLC
218 SI4548_6048-US-TB_en-13 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, "!" is displayed. 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 manually using GenMan.
Why is the display of the Sunny Island dark and why is nothing shown on the
display?
• Is the DC circuit breaker of the Sunny Island switched to "ON"? In this case, the device has
switched off to protect the battery from deep discharge (see Section 13.3 "State of Charge
(SOC) and State of Health (SOH)", page 107). After self-disconnection, restart the
Sunny Island as described in this document (see Section 9.5 "Reactivating the Device Following
Automatic Shutdown", page 75).
• The external battery fuse has tripped.
W884 1 No PV voltage or short-circuit on Sunny Island Charger 4
W885 1 Sensor error (or undertemperature) on Sunny Island Charger 4
W886 1 Overtemperature Sunny Island Charger 4
W887 1 No communication with Sunny Island Charger 4 for more than 24 h
F890 2 Interference at external measurement point of Multicluster Box
F891 2 Interference at external measurement point of Multicluster Box slave 1
F892 2 Interference at external measurement point of Multicluster Box slave 2
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