SMA SB 5000-US - Manual (Page 78)

Troubleshooting SMA America, LLC
78 SB50US-80US-IA-en-37 Installation Manual
9 Troubleshooting
9.1 General
Every inverter is checked prior to leaving the plant. If there are faults in the operation of the inverter,
perform the following steps to rectify the faults.
• Pay attention to Sunny Boy flashing codes. Look up the meaning of the flashing code being
displayed in section 7 ”Commissioning” (page 58).
• Monitor operating modes and error messages on the LCD of the Sunny Boy or via connected
PV plant monitoring. Look up the meaning of messages being displayed in section 8 ”Displays
and Messages” (page 62).
• Monitor the DC and AC voltage at the terminals in the inverter. Please observe all safety
precautions listed in the course of this manual.
• If the fault cannot be rectified, contact SMA Service Line. For contact data, see section
14 ”Contact” (page 103).
If it is necessary to return the Sunny Boy for maintenance, use the original box in order to prevent
shipping damage.
9.2 Error Messages
Error type Error code Description
Interference Ocu-Srr Communication between micro-controllers is
interrupted.
Warning Derating The inverter reduces the output power due to high
internal temperatures.
Interference Disturbance AFCI Electric arc in the PV system. Eliminate the fault in
the PV system. Perform an AFCI self-test. Observe
section ”The Message "Disturbance AFCI" Is
Displayed” (page 60).
Error EarthCurMax-B The ground current of the OCU between PV+ and
GND is outside of the tolerable range.
Error EarthCurMax-S The ground current of the SRR between PV+ and
GND is outside of the tolerable range.
Interference EEPROM Transfer fault while reading or writing data from
the EEPROM. This data is not essential for safe
operation. This fault does not have any influence
on performance.
Error 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.
Interference EeRestore Internal interference.