SMA Solar Technology AG Troubleshooting
Technical Description SI5048-TEN093630 197
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
W877 1 No communication with Sunny Island Charger 3 for more than 24 h
W881 1 Pole of battery connection is reversed or short circuit on the
Sunny Island Charger 4
W882 1 Battery overvoltage Sunny Island Charger 4
W883 1 Overvoltage PV generator Sunny Island Charger 4
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
W890 2 Fault at the external measuring point of the Multicluster Box
W891 2 Fault at the external measuring point of the Multicluster Box slave 1
W892 2 Fault at the external measuring point of the Multicluster Box slave 2
Display no. Level Description