Troubleshooting (Online Form At The Bottom Of This Page)

You have reached the troubleshooting page and you may be able to resolve the issue yourself. The majority of issues require a basic inverter reset which can be accessed with your after sales installation pack.

Please fill in the form at the bottom of the page ensuring you fill out all of the columns so that your issue can be resolved as quickly and effectively as possible. 

All of our techs are on the road and we understand this can be frustrating. Our techs have all the information to help resolve your issues so they are the best people to talk to. Our administration staff do not have all the information you are after. 

Before reading on, here are the support numbers and emails for all the inverter brands we supply and install – their 24/7 support lines are a great way to get your issues resolved in a timely manner as you have access to their in-house engineers. 


Phone: 03 8340 2900



Phone: 1800 746 630



Phone: 1800 465 567



Phone: 1300 482 934



Phone: 02 9491 4200



Phone: 1800 786 476



Phone: 1800 476 928



Phone: 02 5104 0612


Common Issues

  • Flashing red light
    If this occurs we recommend you follow your inverters shutdown procedure in reverse. All inverters have a shutdown procedure that is provided with the manual, and in most cases physically on the inverter.
  • Changing network providers
    If you happen to change network providers your WiFi password will have changed. If this is the case, your inverter will not be able to pick up the new WiFi connection as it is unaware of the new network password. To connect your inverter follow the user manual and it will show you step-by-step how to get your inverter back online.
  • Error codes
    If you have read the user manual and followed the first step there may potentially be an issue with your inverter. If this is the case contact Westsun Energy and we will provide you with more information on the situation and help you to try resolve it ASAP.

Huawei Solar Inverter

Solar Inverter Troubleshooting Information

If your inverter begins to drop out or cause you wi-fi issues below is Huawei’s 24/7 service phone number and email. All you need to do is provide your serial number from your inverter and one of their in-house engineers will be able to guide you through the process of fixing the issue. 


SMA Solar Inverter

Solar Inverter Troubleshooting Information

Growatt Solar Inverter

Growatt Inverter Troubleshooting Information

Whenever a Growatt solar inverter experiences faults, it will display the fault error code. These codes indicate a particular problem or fault that the inverter is in. Listed below are some common error and fault codes that Growatt inverter users may face in the future and how it can be resolved:

  • Error Code 102
    When your Growatt solar inverter displays the Error Code 102, it means that the two CPU sampling date is inconsistent. To fix this problem, turn off the DC switch and wait until the inverter is totally shut down. Turn the inverter on again and observe if it still displays the same error.
  • Error Code 111
    An Error Code 111 usually happens with a Growatt TL3 inverter series. When this error shows up, it means that there is an IGBT drive fault and that you should contact your solar installer for a checkup.
  • Error Code 117
    An Error Code 117 on a Growatt solar inverter means that there is a problem in the relay circuit. Try to restart the inverter and if the problem persists, you should contact your solar installer.
  • Error Code 120
    When a Growatt solar inverter displays the Error Code 120, it means that there is a problem with the current sensor. This Error Code is also known as an HCT fault.
  • Fault Codes
    Growatt solar inverters can experience two types of faults: system faults and inverter faults.
  • HVT Fault
    As stated above, HCT faults mean the inverter is having problems with its current sensor. To repair this, simply restart the inverter and if it still doesn’t work, contact Westsun Energy.
  • PV Isolation Low
    PV Isolation Low is a system fault on a Growatt solar inverter. This means that the inverter’s PV insulation impedance is too low or out of range.

Fronius Solar Inverter

Fronius Inverter Troubleshooting Information

For us to best assist you when submitting your form please let us know any of the below information

  • Fronius fault code displayed (if any)
  • Your inverter model
  • The serial number of your inverter 
  • The purchase date of your inverter

A great thing about Fronius Inverters is that they perform self-diagnosis which automatically informs the owner about the problem immediately. Fronius inverter models have different fault and error codes. These codes are categorised as:

  • Class 1 which is a momentary problem and probably caused by the public grid
  • Class 3 which are usually problems in feeding energy to the grid but only for a short period of time
  • Class 4 which already needs the intervention of an accredited solar installer or engineer
  • Class 5 which do not generally interfere with energy feeding but may cause some restrictions
  • Error Code 314
    Error Code 314 on a Fronius inverter means that there is a current sensor calibration timeout or there is an internal system error. Usually, this problem just fixes itself as the inverter repeats its startup routine. If the problem persists, you should contact us on 08 9303 9810 to investigate the issue.
  • Error Code 509
    If your Fronius inverter encounters Error Code or State Code 509, it means that there was no energy fed into the grid in the last 24 hours. There could be a lot of reasons for this and one of them is that the solar panels are covered in dirt. For maintenance and repairs we recommend Solar PV repairs.

Please allow 1-2 business days for our Technician to get back to you.


Support Form

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