APC SMX750i Failing Firmware Upgrade

[Ghoster]

Hello,

          I have an issue where a SMX750i is failing upgrade at 7%, obviously it starts the process and switches the UPS off, then that's where it stays.

I have installed a new battery pack - still fails the same

I have tried with UPS switched off - still fails the same

I would like to think I am doing everything right as I have no problem with other APC UPS's when using the same FirmwareUpgradeWizard_v4.2.1

UPS Firmware details:

UPS 09.1

MCU 09.1

UBL50E.7

MBL 06.0

The tool automatically selects SMT20UPS_10-2.enc

Any assistance would be great as I would really like to be able to enable the Modbus communications that the later firmware supports.

[APC_Matt]

Hi Ghoster

Could you try the latest firmware upgrade wizard 4.3.0 and see if that helps.

https://www.apc.com/uk/en/faqs/FA279197/ 

If it doesn't I can decode the FUW.log file it produces and see if that highlights the issue.

Thanks

Matt

[Ghoster · Accepted solution]

Hi Matt,

             Thanks for the advice, I must admit I did try and download v4.3 but that was only available outside of UK, seems like they have released it here now, the firmware file is the same.

What I did read on here is that someone had issue and were advised to do a factory reset if they had the 5 button version, I done that and found that upgrade via USB still failed but via serial then worked, so yesterday I was successful lifting it to v10.2 and giving me the Modbus communication.

Thanks again, and hopefully this will help anyone else with similar issues.