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Procedure to determine which of the two causes is responsible for the insulation failure.
Go to the submenu where PV array voltages are shown (PPV and NPV).
PPV and NPV values will show us where is the fault.
We will disconnect the PV array by PV panel quick connectors to determine if the
fault is in or out the inverter.
If Earth Fault is inside the inverter. We will proceed to review Overvoltage Surge
Arresters.
Disconnect the equipment from the power grid and PV array.
Wait at leat 10 minutes for the internal capacitance to discharge.
Open the inverter and check the the DC surge arrester status. Each arrester has an
optical indicator. If the indicator is black, the arresters have been triggered.
Caution: Some three-phase inverter Ingecon
with these surge arresters.
Check the DC fuse status or MT breaker status protecting the surge arresters.
Replace any faulty parts if necessary.
Close the inverter, reconnect to the power grid and to the PV array.
If the fault indication persists, check the PV array insulation. Locate the fault and correct it.
0020H, Temperature, power electronics alarm.
Temperature has reached the limit for the electronics block, and the inverter has stopped.
Pg. 34 de 40
Installation Manual
Ingecon® Sun Three-Phase Inverter
Sun SMART may not be equipped
®
Ref.: AAS2000IKI02
Rev.:_
Dec-2009
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