Eaton ETN2000 Solar InverterThe 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.

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Possible actions

System Fault Ground I Fault 1. 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 Fault 1. 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 Utility 1. Grid is not connected.
2. Check grid connection cables.
3. Check grid usability.
Inverter Failure PV over Voltage 1. 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 Fault 1. Disconnect PV (+) or PV (-) from the input,
restart the PV-Inverter
2. If it does not work, call service
Over Temperature 1. 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 Eaton.

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

Operating conditions



System Fault
Isolation failure Isolation fault Earth fault of the PV-panels or failure of surge voltage protection
GFCI active Ground I fault Leakage current detected from ground conductor is too high
Grid failure Grid fault Grid measured data is beyond the specification (voltage & frequency)
No utility No Utility Utility is not available
Input voltage too high PV over voltage Input voltage is higher than the maximum input voltage
Inverter Fault
Consistent failure Consistent Fault The readings of 2 microprocessors are not consistent. It could be caused by CPU and/or other circuits do not function well.
Temperature too high Over temperature The internal temperature of inverter higher than normal value
Output relay failure Relay Failure The relay between inverter and functional
Output DC injection too high DC INJ High Output DC injection is higher than expected
EEPROM problem EEPROM Failure EEPROM inside has data access problem
Communication failure between microprocessors Communication failure SCI Failure The communication between MCU inside is abnormal
DC bus voltage is too high High DC Bus The DC BUS voltage is higher than expected
DC bus voltage is too low Low DC Bus The DC BUS voltage is lower than expected
2.5V reference voltage inside problem Ref 2.5V Fault The 2.5V reference inside are abnormal
Output DC sensor abnormal DC Sensor Fault Detection of DC output sensor is abnormal
GFCI detection problem GFCI Failure The GFCI detection circuit is abnormal

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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 Gold Coast Power Solutions 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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Eaton ETN2000 Solar Inverter Fault & Error Messages
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