Solar Guides and Tips

Like other solar inverters, the Delta inverters also have fault or error codes that identify a specific problem with the inverter. When a fault is present, an error message will be displayed on the screen and typically, one or a number of the LED’s will be lit. Some common Delta error messages, explanations on the error or fault, and a list of actions to take to resolve the issue are provided below:

Error Code 471

If Error Code 471 shows up in your Delta inverter LCD screen, it is only an information error type which means there is a long time grid out.

Delta Inverter Installation Manual and Tech Support

The error codes and what they actually mean are easier to look up with your Delta inverter installation manual. However, the fixes or repairs for each errors are not stated in the manual. For tech support, you might call Delta’s service line or email them your questions.

Isolation Error

If your Delta inverter is showing an Isolation Error message, it could mean that there is an internal problem with the inverter or something is wrong with the DC and AC and might result in a short circuit. It also means that the inverter will not convert the power to prevent electrical problems.

You can try resetting the inverter manually by following these steps:

  1. Turn off the solar supply main switch or AC isolator.
  2. Turn off DC isolator.
  3. Wait for 1 minute before turning the main switch or AC isolator back on.
  4. Turn on DC isolator.

If the error is still there after rebooting, make sure to contact us so that a solar technician can help you with it.

Warning 143

Alert 143 means ‘Get command index failure’ according to the user installation manual. This might be a problem with the software so you need to contact a solar expert or technician to fix the problem.

For more troubleshooting tips, check out the answers and solutions to some commonly asked solar power system questions here.

Contact us on 1800 836 374 if you have a Delta solar inverter which is in need of a health check or a repair.