While the battery count is happening it will flash the LED with the tones to count out cells.
Once that is done the ESC waits for a 0 throttle input before it will arm. If you do not have the Rx/FBL connected and powered up this will not happen, obviously. If you have not down endpoint setup it will not happen either.
Endpoint setup:
0) Remove blades. Always do this when doing bench work, but especially important when working with ESC and and throttle settings adjustments.
1) Power up Tx, throttle to mid stick. Select mode with linear 0-100 throttle curve.
2) Power up Rx. If your Rx/FBL needs to see zero throttle before it will initialize (7200BX for example) then move to zero throttle to init it and then bring back up to mid stick.
3) Tx travel adjust on throttle channel so that MAX is 70% and MIN is 30%. Throttle stick till mid stick.
4) Power up ESC with the throttle cable connected. It will do it's cell count beeping and then should sit there waiting.
5) Move throttle stick to full up position, and then adjust travel adjust MAX up until you hear it beep (then add another few clicks of travel adj to be safe).
6) Move throttle stick to low position, and then adjust travel adjust MIN down until you hear it do a bunch of beeps (indicating it is initialized) and add a few more clicks down for safety (not a lot, 1-2% is all that's needed for safety margin).
That's it. Endpoints set. Move throttle up and down and the motor will spin up and whatnot.
Now, power it all down as you would normally. Then power it all up normally and the ESC will initialize when the throttle is put at low stick position, after cell count.
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As for your flashing LED issue... It will flash once every 10 seconds (and beep the motor) to indicate it is powered up and waiting, after the cell count. Looking at the manual, I don't think there is an error where the LED flashes RED without the motor being beeped simultaneously.
