Xantrex solar inverters were originally made by a Canadian company but have since been bought out by Schneider Electric. A few years ago they discontinued the Xantrex model and introduced the Conext range of solar inverters to replace it. Due to the model being discontinued when a Xantrex solar inverter fails under warranty (standard warranty was 5 years) Schneider replace it with the new Conext model.
The Xantrex solar inverters can show a range of different fault and error messages, the following is a list of the error messages and fault codes from the Xantrex GT inverter user manual. The list contains procedures for rectifying possible problems and provides you with solutions to get your Xantrex inverter back in action. Please note that safety measures should be observed to avoid any risk of injury. If in any doubt please contact a local qualified solar accredited electrician for assistance.
The inverter’s LEDs and display are blank and the inverter does not operate in sufficient sunlight.
Utility service panel AC and DC breakers are switched off
Turn on the breakers in the sequence described in “Commissioning Procedure” below.
The display reads Inverter Offline and AC Voltage Fault.
Utility service panel breakers are switched off. AC grid voltage is not present or incorrect.
Turn on utility panel breakers. Check AC connections at the inverter’s terminals. Ensure AC voltage is within the range specified and “Output” below is present.
The display reads Inverter Offline with sufficient sunlight.
DC breakers are switched off (if installed), or DC fuses are blown (if installed). DC array voltage is not present.
Turn on any DC breakers and check any DC fuses. Check DC connections at the inverter’s positive and negative DC terminals. Check for incorrectly wired PV arrays.
The display reads Inverter Offline and DC Voltage Fault with sufficient sunlight.
DC voltage is present but incorrect.
Check DC connections at the inverter’s positive and negative DC terminals. Check for incorrectly wired PV arrays. Ensure a voltage within the operating voltage range is present at the inverter’s terminals.
Only the inverter RED LED is illuminated and the display reads Ground Fault.
Ground fault condition detected on the PV array
The PV system should be checked by a qualified electrician and repaired. See “PV Ground Fault Detection” on page viii. To reconnect: 1. Make sure the GT Inverter is not outputting power, and then switch off the DC breaker. If a DC breaker is not used, then disconnect the DC input. 2. Switch off the AC breaker. 3. Remedy the actual ground fault. 4. Restart the unit using the sequence described in “Commissioning Procedure” below.
The System value (power being produced by the system) displayed on each inverter’s LCD is different on inverters connected to the same daisy-chained network.
Inverters can display different system values when one of the inverters is set to a different baud rate than the rest. That particular inverter’s baud rate screen shows Tx and/or Rx error (see Table 5-3 on page 5–6 of the Xantrex GT inverter manual).
Check each inverter’s baud rate and compare the settings. Change any inverters with an incorrect baud rate. Make sure to follow the recommended procedure supplied by Xantrex. See the Application Note, Xantrex Grid Tie Solar Inverter Baud Rate Change Procedure (976-0216-01-01 available on www.xantrex.com).
Here are the steps of the Commissioning Procedure:
To start the GT Inverter:
1. Ensure the AC breaker is off.
2. Ensure the correct multi-contact PV connectors are firmly plugged into the GT Inverter as described in “Connecting the DC Wiring” on page 3–2 of the Xantrex Solar Inverter manual.
3. (GT 2.8-AU only) Ensure the AC quick connect is firmly inserted into the GT Inverter and that the coupling ring is tight.
4. Uncover the PV array and/or close the main DC disconnect switch, if one is installed. Ensure the PV array is producing the required output voltage.
5. Connect the utility grid voltage by switching the AC circuit breaker on.
The AC Voltage should be within below Output range:
Maximum output power
2800 W ac
5000 W ac
Maximum output current
Nominal grid voltage
Nominal grid frequency
Total Harmonic Distortion (THD)
>0.99% (at rated power) >0.95% (full power range)
Output current waveform
If you need to check the full details, you can find them on the Xantrex solar inverter manual’s Troubleshooting section. Should you follow the troubleshooting steps above but the issue is not fixed on your Xantrex solar inverter check if it’s still within the warranty period so you can contact the equipment installer or supplier.
If your Xantrex solar inverter is outside the warranty period we suggest that you contact a professional solar power expert. Fill out the following form and we’ll help as much as we can.