Sunway NT 4000, NT 6000, NT 2600 Line Error UDC Overvoltage, Line Error AFI Residual current

· DC overvoltage

A maximum no-load voltage of 750 V is permitted for the PV generator.

All components of the DC input are ade- quately dimensioned with a safety factor. If the threshold is exceeded, the solar inverter stops the feed-in and a «DC over- voltage error» is displayed.

Display for DC overvoltage:

Line 1	Error: UDC
Line 2	Overvoltage

· AFI residual current

The AFI residual current (insulation error, ground fault) is displayed if a residual current has occurred in the PV system and the solar inverter has subsequently discon- nected from the grid. Ground faults are monitored on both the AC and DC side (universal current-sensitive FI). If this error message is displayed, the entire PV system must be checked for insulation errors. The AFI residual current operated device only monitors the phase into which feed-in occurs.

Display for AFI error protection:

Line 1	Error: AFI
Line 2	Residual current

· Overheating fault

Your solar inverter is designed for an ambient temperature of up to +40°C. When the maximum upper temperature threshold is reached, the feed-in is stop- ped. When the heat sink temperature has decreased, the solar inverter starts up again automatically.

Line 1	Error: TEMP
Line 2	Overtemperature

126