Currently, the double-beep fault is only elicited after appx. 15 minutes of use, at which time it is initially reported as a triple-beep error.
After the fault has been reported, if I try to "reset" the unit by cycling its power supply, or even by disconnecting that head's line and then re-connecting it to either its own control box or the second control box, it reports the double-beep error note. Thereafter, no matter how many times I try to "reset," and no matter by what means, I continuously receive the double-beep error tone.
If the unit is then left alone, and re-powered after appx. 7+ hours, it will repeat this pattern of having an initial 15-minutes of seemingly OK operation, followed by incessant and repeated double-beep messages. (Attempts to re-power the unit after a shorter time span of having it turned-off results in, immediately
, the double-beep error tone being reported.)