Inverter error because of "UPS: The load exceeds 100% of rated capacity." What can I do to prevent this again?

[mikeinnyc]

Unfortunately, I have learned the hard way what a P13 Inverter Error is. That lesson is to read the log files and take action. My primary SRT5KRMXLT APC Unit is no longer starting and the LCD is fire engine bright red. I have tried everything, including trying to load firmware and switching batteries, but it is still DOA. When I have the time, I will try to replace the inverter chips and transistors on the board, but for now, I am using my backup SRT5KRMXLT.

My problem is that my running load never exceeds 50% of the rated watts and usually around 25%, but when it cold starts, it goes above 100% of the rated. How do I find the exact amount over the rated amount?

My temporary solution was to load shed my servers so they do not startup in the BIOS. If power is shut down by myself, then do not start up cold when called to power up by the APC locally. This seemed to help eliminate the overload condition sometimes but not all. However, when I tested this out about 50% of the time it would still show the error "UPS: The load exceeds 100% of the rated capacity." I needed my cold startup to completely be error-free.

Ultimately, I had to physically switch off my step-down transformer switch in the back of the unit rendering Server Nodes 3 and 4 completely off. I have two Step down transformers. One for Primary server nodes 1 and 2 and another for the secondary Nodes 3 and 4. After turning off the step-down transfer switch the error, "The load exceeds 100% of rated capacity" is completely gone and works as advertised.

Can I physically switch off the breaker in the back of my step-down transformer 208v to 120v after a scheduled shutdown to help load shedding? I'll switch to the ON position after the APC has started Nodes 1 and 2 and when the servers Nodes 3 and 4 are off (Bios settings are Off).

I know adding another 30-amp line and segregating nodes 3 and 4 is the correct way but is the above ok also?

I'll take any free advice after this fiasco.

Mike