June 29, 20241 yr Hi everyone. As I mentioned before, I’m working on upgrading the firmware of a bunch of inverters (all exactly the same), the process was smooth with 38 units so far except for one that couldn’t be upgraded through the RS232 port or using my ugly USB-Serial cable directly to the controller board. When I press "Update Firmware" the inverter clicks and fans run at high speed then after a few seconds I get the failure message. I found that the controller of this particular unit didn’t have this small board in place of the circled IC as all the others. Any thoughts? And thank you all. Edited June 29, 20241 yr by AMalakani
June 29, 20241 yr Some F32 Error are same message. Some F32 error are ok when upgrade Communication Sw and U1 Sw upgrade. But some F32 error not ok. It found just like that.
June 30, 20241 yr 21 hours ago, AMalakani said: When I press "Update Firmware" the inverter clicks and fans run at high speed then after a few seconds I get the failure message. The fans default to 100% speed by hardware after a reset; the firmware needs to be running to set them to a low speed. So my wild guess is that the firmware crashed or the power supply failed, causing the DSP to reset, but since the bootloader was running (possibly the main firmware was erased at this point), there was nothing to quieten the fan. Perhaps the small daughter board is needed for comms. It's in a position that is normally occupied by an SPI port expander in earlier control boards, but that's a 16 pin chip, and I think that later control boards don't need or use them. So I have no idea what chip takes its place.
July 1, 20241 yr Author On 2024/06/30 at 4:04 PM, Coulomb said: The fans default to 100% speed by hardware after a reset; the firmware needs to be running to set them to a low speed. So my wild guess is that the firmware crashed or the power supply failed, causing the DSP to reset, but since the bootloader was running (possibly the main firmware was erased at this point), there was nothing to quieten the fan. I tried so many times with the update but had no luck and inverter works fine when unplug and plug it again to power. Yesterday I received a half-burnt inverter with a controller board which has the daughter PCB. I switched the controllers and the firmware got updated fine ... and problem solved 😅 On 2024/06/30 at 4:04 PM, Coulomb said: Perhaps the small daughter board is needed for comms. It's in a position that is normally occupied by an SPI port expander in earlier control boards, but that's a 16 pin chip, and I think that later control boards don't need or use them. So I have no idea what chip takes its place. I don't think so, because today I opened a new inverter out of the box and surprisingly the controller board has a missing daughter board and its base is broken. I thought it won't work or get updated, but it worked fine and was updated without problems ... strange. 🤔 Edited July 1, 20241 yr by AMalakani
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