Troubleshooting; Detection And Elimination Of Faults; Detecting Errors With The Sunny Central String-Monitor Controller - SMA SUNNY CENTRAL STRING-MONITOR US Technical Description

Troubleshooting

12 Troubleshooting
12.1 Detection and Elimination of Faults
By means of the Sunny WebBox you can look at the spot value "Error" for the Sunny Central String-
Monitor Controller or the Sunny Central String-Monitor. These spot values indicate that errors have
occurred.
12.1.1 Detecting errors with the Sunny Central String-Monitor
Controller
1. Log into the Sunny WebBox as an installer.
2. Go to "System > Devices" on the web interface.
3. Select the Sunny Central String-Monitor Controller "SCSMC" in the list.
4. Select the tab "Spot values".
5. Select the spot value "Error".
☑ If the spot value "Error" displays an alert, compare the message with the following table and
eliminate the error. If the spot value "Error" does not display any warning, go on to next point.
Display Meaning
> Warning 380 A string is not reaching the
< Warning 380
74 SSMUS-TUS094511
normal current. String failure or
error trigger
>: Incoming warning
<: Outgoing warning
Corrective measures
• Check which Sunny Central String-
Monitor is faulty (see spot value
"SSMUWrnCode"in Section
11.3.1 "Spot values Sunny Central
String-Monitor Controller" (page 64)).
• Check string current values in the Sunny
Central String-Monitor
☑ If the string current values are
correct:
– Adjust parameter "ErrLevGr" in the
Sunny Central String-Monitor
Controller.
☑ If the string current values are
incorrect:
– Check the hardware of the Sunny
Central String-Monitor.
– Use clamp meter to test the PV field/
panel.
SMA Solar Technology AG
Technical Description