Eaton ETN2000 Solar Inverter Fault and Error Messages

The Eaton ETN2000 solar inverter can develop a number of different faults and when a fault is present an error message will be displayed on the screen and usually the fault light will be lit. Below is a list of error messages, explanations on the error or fault and a list of possible actions to take to resolve the issue.

View the Eaton ETN2000 Solar Inverter manual here.

FaultDisplayPossible actions
System FaultGround I Fault1. The ground current is too high.
2. Unplug the inputs from the PV generator and check the peripheral AC system
3. After the cause is cleared, re-plug the PV panel and check PV-Inverter status.
4. If the problem persists please call service.
Grid Fault1. Wait for 5 minutes, if the grid returns to normal, PV-Inverter automatically restarts.
2. Make sure grid voltage and frequency meet the specifications
3. If the problem persists please call service
No Utility1. Grid is not connected.
2. Check grid connection cables.
3. Check grid usability.
Inverter FailurePV over Voltage1. Check the open PV voltage, see if it is greater than or too close to 500VDC
2. If PV voltage is less than 500VDC, and the
problem still occurs, please call local service
Consistent Fault1. Disconnect PV (+) or PV (-) from the input,
restart the PV-Inverter
2. If it does not work, call service
Over Temperature1. The internal temperature is higher than
specified normal value
2. Find a way to reduce the ambient temperature.
3. Or move the inverter to a cooler environment
4. If it is not effective, call local service
Relay Failure
SCI Failure
High DC Bus
Low DC Bus
Ref 2.5V Fault
DC Sensor
GFCI Failure
1. Disconnect ALL PV (+) or PV (-)
2. Wait for few seconds
3. After the LCD switches off, reconnect and check again
4. If the message reappears, please contact

Here are some error messages and descriptions that you may see on the Eaton ETN2000 Solar Inverter display screen.

Operating conditionsDisplayDescription
System Fault
Isolation failureIsolation faultEarth fault of the PV-panels or failure of surge voltage protection
GFCI activeGround I faultLeakage current detected from ground conductor is too high
Grid failureGrid faultGrid measured data is beyond the specification (voltage & frequency)
No utilityNo UtilityUtility is not available
Input voltage too highPV over voltageInput voltage is higher than the maximum input voltage
Inverter Fault
Consistent failureConsistent FaultThe readings of 2 microprocessors are not consistent. It could be caused by CPU and/or other circuits do not function well.
Temperature too highOver temperatureThe internal temperature of inverter higher than normal value
Output relay failureRelay FailureThe relay between inverter and functional
Output DC injection too highDC INJ HighOutput DC injection is higher than expected
EEPROM problemEEPROM FailureEEPROM inside has data access problem
Communication failure between microprocessors Communication failureSCI FailureThe communication between MCU inside is abnormal
DC bus voltage is too highHigh DC BusThe DC BUS voltage is higher than expected
DC bus voltage is too lowLow DC BusThe DC BUS voltage is lower than expected
2.5V reference voltage inside problemRef 2.5V FaultThe 2.5V reference inside are abnormal
Output DC sensor abnormalDC Sensor FaultDetection of DC output sensor is abnormal
GFCI detection problemGFCI FailureThe GFCI detection circuit is abnormal

For more details checkout the Eaton ETN2000 Solar Inverter manual’s Troubleshooting section. If you still have an issue after following the recommendations listed above we recommend that you contact a professional solar power expert. If you’re in the Gold Coast or Brisbane area contact SAE Group here and we will be in touch to provide you with further assistance.

View the Eaton ETN2000 Solar Inverter manual here.

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