question

southsideph avatar image
southsideph asked

Multiplus Fails Firmware Update with latest version VRM

Only Guessing, Multiplus 12/1600/70 failed to update firmware 4.89 at 40% "writing firmware". Is this the latest firmware or latest VRM?



VRMfirmware update
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

2 Answers
Paul B avatar image
Paul B answered ·

Make sure that the DMC is disconnected and if a VE-BMS is connected then unplug this.

basically ONLT the Multiplus and the GX device is to be connected to the VE-Bus when doing the upgrade

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Sarah avatar image
Sarah answered ·

Hopefully this has already resolved but I found I also needed AC power to be present (as well as battery) to complete the upgrade of a MultiPlus II. This is in addition to Paul’s advice above.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.