I have SPI-10K-UP (which is an OEM version of SRNE ASF48100U200-H) 10K split phase 120/120 inverter. Within the first few hours of use, while top charging my battery (which has 200 amp JK BMS) at 80 amps, the system cut off with an error 20 for over temperature and reads 120 deg C as the heatsink temperature. Well, I am certain it was not that hot. After "cooling" overnight, and every time I start the inverter up since then, it still registers 120 deg C and the same error code, 20.
My dealer of the inverter in China had me disconnect all 8 of the thermistor leads to see if the problem will continue. It did. I tested each thermistor and they were all approximately 18.8K ohm at approximately 22 deg C, which is fine.
The dealer now wants to replace the controller board. This will take a few weeks by the time it arrives to me from China. I am skeptical that it is the controller board since if a thermistor signal path is shorted the temperature would read maximum temperature (which is probably the 120 deg C indicated) AND such a short could be anywhere in the signal path of any of the 8 thermistors. These thermistors do not connect directly to the controller board but rather through the PCBs that have all the heatsinks, inductors, and capacitors. The auto reset of the over temperature disconnect is enabled. I tried disabling that reset and reenabling it and that did not help. I also removed and re-seated the controller board and that did not help.
Anyone seen this problem with the temperature sensing stuck on the highest value?
I asked if I could re-flash the firmware just to make sure that did not somehow get corrupted. The SRNE engineer told my vendor that they felt that could damage the inverter and that such a re-flash would void the warranty (huh?)
So I wait for a new controller board, skeptical it will solve the problem. Anyone seen this issue? When I ask if SRNE has seen this issue before, I get crickets.
My dealer of the inverter in China had me disconnect all 8 of the thermistor leads to see if the problem will continue. It did. I tested each thermistor and they were all approximately 18.8K ohm at approximately 22 deg C, which is fine.
The dealer now wants to replace the controller board. This will take a few weeks by the time it arrives to me from China. I am skeptical that it is the controller board since if a thermistor signal path is shorted the temperature would read maximum temperature (which is probably the 120 deg C indicated) AND such a short could be anywhere in the signal path of any of the 8 thermistors. These thermistors do not connect directly to the controller board but rather through the PCBs that have all the heatsinks, inductors, and capacitors. The auto reset of the over temperature disconnect is enabled. I tried disabling that reset and reenabling it and that did not help. I also removed and re-seated the controller board and that did not help.
Anyone seen this problem with the temperature sensing stuck on the highest value?
I asked if I could re-flash the firmware just to make sure that did not somehow get corrupted. The SRNE engineer told my vendor that they felt that could damage the inverter and that such a re-flash would void the warranty (huh?)
So I wait for a new controller board, skeptical it will solve the problem. Anyone seen this issue? When I ask if SRNE has seen this issue before, I get crickets.
