SMA America, LLC Troubleshooting
Technical Description SI5048U-TUS121440 207
20.8.8 AUX Category
Display no. Level Description
F801 4 Plausibility check of the contactors in a Multicluster Box has failed
W804 1 Grid operation not possible
W805 1 Generator operation not possible
F806 4 Multicluster Box settings do not correspond to the software settings.
W807 1 No valid grid voltage with the requested grid operation
W808 1 Error Q4 contactor
F809 4 Error Q10 contactor (load shedding)
F810 4 Error in 15 V supply of the Multicluster Box
F811 4 Error in 24 V supply of the Multicluster Box
W815 1 Error Q5 contactor
F816 2 Error Q7 contactor
F817 4 Error Q9 contactor
F818 4 A phase is missing, Multicluster Box goes into ”Failure” status
W851 1 Pole of battery connection is reversed or short-circuit on the Sunny
Island Charger 1
W852 1 Battery overvoltage Sunny Island Charger 1
W853 1 Overvoltage PV generator Sunny Island Charger 1
W854 1 No PV voltage or short-circuit on Sunny Island Charger 1
W855 1 Sensor error (or undertemperature) on Sunny Island Charger 1
W856 1 Overtemperature Sunny Island Charger 1
W857 1 No communication with Sunny Island Charger 1 for more than 24 h
W861 1 Pole of battery connection is reversed or short-circuit on the Sunny
Island Charger 2
W862 1 Battery overvoltage Sunny Island Charger 2
W863 1 Overvoltage PV generator Sunny Island Charger 2
W864 1 No PV voltage or short-circuit on Sunny Island Charger 2
W865 1 Sensor error (or undertemperature) on Sunny Island Charger 2
W866 1 Overtemperature Sunny Island Charger 2
W867 1 No communication with Sunny Island Charger 2 for more than 24 h
W871 1 Pole of battery connection is reversed or short-circuit on the Sunny
Island Charger 3
W872 1 Battery overvoltage Sunny Island Charger 3
W873 1 Overvoltage PV generator Sunny Island Charger 3
W874 1 No PV voltage or short-circuit on Sunny Island Charger 3
W875 1 Sensor error (or undertemperature) on Sunny Island Charger 3
W876 1 Overtemperature Sunny Island Charger 3
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