A pair of Quattro 5000's in split phase... trying to diagnose why after approx 5hrs of battery charge from the grid, the amperage on one of the legs drops to ½ the current draw every 2 minutes or so. While investigating, I happened to lightly push on the upper front panel, and the whole system went down. (can be recreated by a gentle push on the panel again). The 2nd Quattro does not exhibit this behaviour. Is the circuit board (behind the panel) so sensitive, that the slightest deflection of the front panel shuts it down?