SMA SC 400HE - Manual (Page 87)

SMA Solar Technology AG 7 Troubleshooting
Operating Manual SC4-63HE-BE-BEN103280 87
7.5 Events
420 Error text:
ADAPSCP Overtemperature Error type 3
Failure cause:
Heat sink temperature is too high (hardware threshold)
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.
421 Error text:
ADAPSCP Overvoltage DC Voltage link Error type 2
Failure cause:
DC voltage is too high on the generator side (hardware threshold).
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.
Event Explanation
> LVRT Low Voltage Ride Through (LVRT) is active
> Net-Parameter Grid parameters are set incorrectly
> NSM Power limitation via grid management activated
< NSM Power limitation via grid management deactivated
> FRQ-Derating Frequency-dependent output limitation activated
< FRQ-Derating Frequency-dependent output limitation deactivated
No. Description