The PF700 does not directly detect, or care, about an input phase loss. Like all drives, it rectifies the incoming AC to DC anyway, and in the case of this drive, the control power to operate the drive is taken from the DC bus, so it CAN and does operate with a single phase input. People use them for this purpose all the time; run a 3 phase motor from a single phase source.
What the PF700 DOES care about is DC bus ripple. When you are only using 4 or the 6 input diodes on the rectifier bridge, there is a lot more DC bus ripple, and the capacitors in the drive cannot handle it all. But this it completely load dependent, in that the amount of ripple mitigation by the capacitors is directly proportional to the amount of current they are expected to deliver. So if the load is only 50% of the RATED capacity of the drive, you may never know that you lost an input phase.
If, however, the load INCREASES beyond the ability for the DC bus caps to keep it smooth, then the drive will trip. The TRIP DISPLAY will state "Input Phase Loss", because that is the most likely cause of excess DC bus ripple. A failing capacitor will do it too, but that's much much less likely and they tend to have other issues going along with that which make it obvious.
If your drive "blew up", I suspect that it was NOT the RESULT of the input phase loss, because the drive should have tripped BEFORE any damage was done. It's more likely that whatever CAUSED the input line fuse to clear, ALSO was related to (or caused) the drive to "blow up".
You cannot disable the DC bus ripple trip function, it is there to prevent drive failures. What you can do is to ignore the warnings about it by turning off the alarm function (which preceded the trip). I highly recommend AGAINST doing that.
