SMA SC 400HE - Manual (Page 82)

7 Troubleshooting SMA Solar Technology AG
82 SC4-63HE-BE-BEN103280 Operating Manual
201 Error text:
Ground fault or Overtemperature Error type 2
Failure cause:
• The overtemperature failure chain is interrupted (refer to the circuit diagram).
• Switch cabinet overtemperature
• Transformer overtemperature
• Diode overtemperature
• The insulation resistance of the PV plant is lower than the set limiting value.
• GFDI tripped
Corrective measures:
• Check the cooling fans for proper function.
• Clean or replace dirty air filters.
• Ambient or cooling air temperature too high.
• Check the insulation resistance of the PV array.
• 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 section 7 "Troubleshooting", page 75 and additional
documentation in the download area of SMA Solar Technology AG at
www.SMA.de/en).
206 Error text:
Emergency shutdown activated Error type 4
Failure cause:
The device's own emergency shut-off was activated.
Corrective measures:
Unlock emergency and confirm failure (see section 7.6 "Confirming Errors", page 88).
209 Error text:
DC Short circuit Error type 4
Failure cause:
An internal short circuit was detected on the DC side within the inverter. The DC main switch
was switched off.
Corrective measures:
• Check the Sunny Central from the outside.
• If possible, the Sunny Central should be externally disconnected.
• Contact the SMA Serviceline.
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