Problems with Optipower Ultra guard

[Mark_T]

I just noticed that the red lamp is turned on as soon as I steer the sticks rapidly. Does this mean that it is engaging?

It means it is getting ready to alarm and is just helping out a bit with the voltage ...

Very short momentary voltage drops are pretty much normal with almost every BEC or regulator, what matters more is how low it goes and for how long.

The UG430 will step in and support the voltage if it drops by 0.5V or more but will only alarm if the voltage stays low for more than a very brief period.

Net effect is your voltage is never allowed to fall by more than 0.5V but the alarm doesn't go off unless there is a real problem

[waqr]

So this is normal?

[David Drew]

I noticed on that instruction manual posted above that if you move the servos during start-up the Guard may not arm.

[heathy]

Can you give us a bit more detail on your setup, which BEC, the voltage it is set to etc. ?

Also more details on the model, servos, wiring etc. would help.

7hv
Gryphon quaser bec @ 8.4v
Bec wired into neg side of 6s pack only 22.2v
Opti guard was working fine but just stopped.

[Mark_T]

7hv
Gryphon quaser bec @ 8.4v
Bec wired into neg side of 6s pack only 22.2v
Opti guard was working fine but just stopped.

Thanks, so the fault you see is that the white alarm LED is flashing shortly after you power everything up?

Do you have any telemetry on the heli that would show what the actual voltage is at the time this happens?

[Mark_T]

So this is normal?

Generally, yes.

If it happens with only moderate stick movement it can indicate a weak BEC as the voltage really shouldn't fall so easily, but most BECs will drop briefly under a heavy load.