Troubleshooting SMA America, LLC
78 SB50US-80US-eng-IUS112633 Installation Guide
Disturbance EEPROM Transfer fault whilst reading or writing data from
the EEPROM. This data is not essential for safe
operation. This fault does not have any influence
on performance.
Fault EEPROM p Data from the EEPROM are defective. The
operation of the inverter is permanently inhibited
as the data loss affects important functions of the
inverter. Contact SMA.
Disturbance EeRestore Internal disturbance.
Disturbance Fac-Bfr, Fac-Srr The AC power frequency is exceeding the
permissible range. To prevent islanding, the
Sunny Boy disconnects itself from the power
distribution grid.
If the power frequency is within the tolerable
range and the error message "Fac-Bfr" or "Fac-
Srr" continues to be displayed, contact SMA.
Warning GFDI Fuse Open The GFDI fuse is cleared. Before replacing the
fuse, check the PV array for a ground fault error.
Disturbance Grid-Timeout, Grid-
Fault-S
The system configuration cannot be detected
(208 V/240 V/277 V).
If a 277 V grid is configured: Check whether the
cables for L1 and N are located in the correct
connection terminals.
Disturbance Imax Overcurrent on the AC side. The current to the AC
grid exceeds the guidelines. The reason for this
may be a severe system incidents. If "Imax"
appears frequently, check the AC grid. If you
require help, contact SMA.
Disturbance K1-Close Relay test failed. Contact SMA.
Fault K1-Open, K2-Open
Disturbance MSD-FAC, MSD-Idif Internal measurement comparison fault:
The BFR and SRR values measured by the Sunny
Boy differ too strongly from one another.
Contact SMA.
Fault MSD-VAC
Disturbance OFFSET Grid monitoring self-test failed.
Fault ROM The internal test of the Sunny Boy control system
firmware failed. If this fault occurs frequently,
contact SMA.
Disturbance Shut-Down Continuous internal overcurrent.
Fault Type Fault Code Description
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