SMA SC 400HE - Manual (Page 85)

SMA Solar Technology AG 7 Troubleshooting
Operating Manual SC4-63HE-BE-BEN103280 85
402 Error text:
Ser. com. with inverter bridge disturbed Error type 2
Failure cause:
• The RS485 communication between the inverter bridge and the Sunny Central Control
is interrupted.
• The inverter bridge or the Sunny Central Control may be faulty.
Corrective measures:
• Check the RS485 wiring.
• Contact the SMA Serviceline if the error persists.
408 Error text:
PV Overvoltage Error type 3
Failure cause:
DC voltage is too high on the generator side.
Corrective measures:
• Immediately disconnect the PV array from the Sunny Central! Danger of damage to
the Sunny Central!
• Check the DC voltage.
• Check module wiring and plant design.
Information:
• If the failure poses a danger to the PV plant or the Sunny Central, the Sunny Central
switches into the "Waiting" operating state for 30 minutes.
409 Error text:
IGBT Stack Temperature Error type 3
Failure cause:
Heat sink temperature is too high (software).
Corrective measures:
• Check the function of the inverter bridge cooling fans.
• Clean soiled air inlet or heat sink.
• Ambient or cooling air temperature too high.
• Contact the SMA Serviceline if the error occurs frequently.
No. Description