SMA SC 250U - Manual (Page 33)

SMA America, LLC Error Diagnosis
User Manual SCUS-BE-BUS120514 33
7.1 Diagnosis
The displayed faults are divided into the three areas of the PV system:
• PV generator (see Section 7.1.1 ”PV Generator Fault” (page 33)).
• Sunny Central (see Section 7.1.2 ”Sunny Central Fault” (page 34)).
• Grid (see Section 7.1.3 ”Grid Fault” (page 36)).
7.1.1 PV Generator Fault
If the fault is on the PV generator side, a two-digit error code
appears on the left side of the system display (see figure to the
right: A). With this error number you can narrow down the
type of malfunction. The table below describes the type of
fault, its cause and what you can do to rectify the fault.
No. Description
34 Error text:
DC-Overvoltage
Cause of fault:
The voltage of the PV generator is too high.
Corrective measures:
• Immediately disconnect the PV generator from the Sunny Central! The
Sunny Central can be damaged by the high input voltage.
• Check the input voltage.
• Check module wiring and system design.
35 Error text:
Ground Fault
Cause of fault:
The PV generator has a connection to ground.
Corrective measure:
• Check the PV generator for a ground fault.