Optimate 4 Can-Bus odd LED illumination

2007 R1200R with a new Yuasa AGM battery.

The Optimate 4 is displaying an LED pattern that isn't described in the instruction sheet (a truly opaque piece of work IMO). I plugged the Optimate's Can-Bus plug into the bike, then plugged the Optimate into the wall socket. The Optimate shook hands with the bike, and opened the bike's 12v connection as described in the instruction sheet. A few hours later, however, the LEDs are doing this: the green LED (#1) is illuminated solidly. LEDs nos. 3, 4, 5, 6, and 7 are off...but every five or six seconds all five flash twice, then go off again. The pattern then repeats continually.

The bike cranks briskly, so I'm pretty sure the battery is actually fully-charged.

Have any of you seen this behavior? The merchant (RevZilla) was friendly but clueless; I've written to Optimate but they haven't answered yet.

EDIT: I started the bike later this morning (started right up), then turned it off again and reconnected the Optimate. Now LED #5 is blinking, which matches the instructions' description of "Step 7 - TEST after charge." Perhaps it's back on track.

I think a power surge or quick drop cycle can cause something like this although my LED's blink a little differently. I pull the plug out of the wall, count to 10 then plug it back in. It usually initializes just fine after that.

Thanks Mike, I think you're right.

After almost a day plugged in, the Optimate now shows two green LEDs (#1, for plugged into the wall, and #5, for 100% charged). Maybe it just had to get used to things, or the battery did, or they were waiting for a particular phase of the moon.