Technical data

118
Confidential
Error Messages (3)
CODE Displayed description
Possible cause Action
E020 DC-DC Relais Fail Input relay failure
Inverter swap
E021 Inverter Relais fail Output relay failure
Inverter swap
E022 Autotest timeout Internal failure
Inverter swap
E023 DC Injection Error DC voltage Sensor failure Inverter swap
E024 Unknown Error Unknown internal failure
Inverter swap
E025 Riso low
PV Field insulation failure
(Insulation-resistance < 1 Mohm)
Insolation resistance of Module verifcation or
externe Overvoltage surge arresters check
E026 VRef Error Internal reference out of limit
Inverter swap
E027 VGrid measure Fault
Redundant grid voltage
meaurement out of limit
Grid voltage verification
Otherwise: Inverter swap
E028 FGrid Measure Fault
Redundant grid frquency
meaurement out of limit
Check country settings of inverter (IT for Italy, DE
for Germany, etc.) , check frequency: Otherwise
Inverter Swap