SMA SC 200 - Manual (Page 87)

SMA Solar Technology AG Troubleshooting and Problem Solving
User Manual SC-BEN100262 87
111 Error text:
Grid frequency to high or to low Error type 2
Cause of error:
Grid limits breached.
Corrective measures:
• Check the display of the grid monitoring relay.
• Check the fuses in the load circuit.
112 Error text:
External Grid Monitoring triggered Error type 2
Cause of error:
Voltage or frequency on the AC side is outside the permitted range.
Corrective measures:
• Check the grid connections.
• Check grid stability.
• Check right-hand rotating field.
201 Error text:
Ground fault or Overtemperature Error type 2
Cause of error:
• The overtemperature fault chain is interrupted (see wiring diagram).
• Switch cabinet overtemperature
• Transformer overtemperature
• Diode overtemperature
• The insulation resistance of the PV system is lower than the set threshold value.
• GFDI tripped
Corrective measures:
• Check function of cooling fans.
• Clean or replace clogged air filters.
• Ambient or cooling air temperature too high.
• Check insulation resistance of PV generator.
• In the event of an insulation fault, separate and connect individual strings to detect the
faulty one.
• Check the function of the ground fault monitoring system.
• Check GFDI (see additional documentation in the download area at www.SMA.de/en).
No. Description