What's with the red flashing light?

[rockliffe]

As a newbie, I';m aware that any issues I';m encountering are likely to be finger trouble at my end, so maybe someone could offer an explanation. Twice now I have experienced the red flashing light on the Naza replacing a slow green flashing light during flight. It seems to appear after about five minutes of flight time, but the quad still seems to be in GPS mode and still appears to respond to my inputs, but I';m very wary of flying any height or distance. At the moment I';m very fearful of losing control of my Spyder 850 and so am being very careful with my flying. Can anyone offer some guidance on this? I';m seeing conflicting information on YT videos which makes it very difficult as a newbie to decide what is right or wrong!

Once GPS is locked on, after the Naza dance and calibration, is it still possible to lose a GPS connection?

BTW, once I have done the first 360 turn with the quad, the green light flashes but doesn';t extinguish...I thought it was supposed to go out before I did the vertical 360 turn?

In fact the green light simply flashes on and off slowly. Is this supposed to be ready for flight?

Is GPS mode a good mode to fly in?

There are a few questions here fellas, but if someone could offer an answer to each of them I';d be very grateful. Cheers fellas...

[rockliffe]

edit

[BrianS]

Low battery voltage?

[DarkButterfly]

Either you switched to manual mode or it';s the low voltage warning.

[rockliffe]

Low battery voltage?

Hmm, brand new battery, I check voltage with a meter and charged directly before flight... BTW, I';m getting about 12 minutes flight time, which I think is disappointing (?)

[rockliffe]

Either you switched to manual mode or it';s the low voltage warning.

??? Definitely not manual mode as manual mode is not configured at the moment. I fly, in GPS and ATTI mode, with failsafe on the third position of the front top left switch of my DX9...

[xxpitt]

you have to configure when u want the voltage warning to kick in, it sets it pretty high if you don';t also think there is 2 stages, 1st is warning with lights then 2nd is landing. i thinks anyway, been a long time since i used naza

[BrianS]

Hmm, brand new battery, I check voltage with a meter and charged directly before flight... BTW, I';m getting about 12 minutes flight time, which I think is disappointing (?)

Check the low battery voltage settings in the DJI assistant software.

[rockliffe]

you have to configure when u want the voltage warning to kick in, it sets it pretty high if you don';t also think there is 2 stages, 1st is warning with lights then 2nd is landing. i thinks anyway, been a long time since i used naza

Hiya, hmm, so how do I know what voltage to set for the first warning % is it by trial and error?

[xxpitt]

no its an actual voltage which you naza reads from the vu unit, and which you set in the naza assistant, think it the last page, u need to tell it how many cells you are running , then what voltage you want it to kick in, or think you can just disable it, but not 100%

[DarkButterfly]

Hiya, hmm, so how do I know what voltage to set for the first warning % is it by trial and error?

No you need to find the line loss by taking a fully charged LiPo, set the loss to 0 on both stages, fly until the the warning light flashes, land, write down the end voltage, subtract that from your fully charged voltage, that will give you the line loss, enter this number into the loss setting, then enter when you want the first stage to kick in, then enter when you want the second stage to kick in and what should happen when it does.

[rockliffe]

No you need to find the line loss by taking a fully charged LiPo, set the loss to 0 on both stages, fly until the the warning light flashes, land, write down the end voltage, subtract that from your fully charged voltage, that will give you the line loss, enter this number into the loss setting, then enter when you want the first stage to kick in, then enter when you want the second stage to kick in and what should happen when it does.

Hi matey, hmm, sorry, but you';re talking to a real nube! OK, I understand the bit about finding the voltage after the light flashes (I think) and subtracting that from the full voltage, but then I';m lost! Also, which I find strange, the battery charger, B6 10, is set with 4 cell, 6000mah, which is correct, but charges the battery up to 16.8v, which I have been told is correct... is this right? Should it not be 14.8v?

[DarkButterfly]

Hi matey, hmm, sorry, but you';re talking to a real nube! OK, I understand the bit about finding the voltage after the light flashes (I think) and subtracting that from the full voltage, but then I';m lost! Also, which I find strange, the battery charger, B6 10, is set with 4 cell, 6000mah, which is correct, but charges the battery up to 16.8v, which I have been told is correct... is this right? Should it not be 14.8v?

16.8v for a 4s is correct.

For example, your start voltage is 16.8v, when you fly then land after the light comes on, if the voltage reads 14.8v, then your line loss is 2v.

[rockliffe]

16.8v for a 4s is correct.

For example, your start voltage is 16.8v, when you fly then land after the light comes on, if the voltage reads 14.8v, then your line loss is 2v.

Ahh, thanks for that. OK, nearly there, with you so far.. but...and forgive me but would you be kind enough to expand on this a little...

then enter when you want the first stage to kick in, then enter when you want the second stage to kick in and what should happen when it does.

[DarkButterfly]

Ahh, thanks for that. OK, nearly there, with you so far.. but...and forgive me but would you be kind enough to expand on this a little...

then enter when you want the first stage to kick in, then enter when you want the second stage to kick in and what should happen when it does.

The first stage can be set after you enter the line loss value, theis can be set at 14.8v nominal voltage for 4s

The second stage is the absolute safety limit, this can be set at 13.8v and the action could be set to auto land.

[rockliffe]

The first stage can be set after you enter the line loss value, theis can be set at 14.8v nominal voltage for 4s

The second stage is the absolute safety limit, this can be set at 13.8v and the action could be set to auto land.

Ah, great, but do I set the absolute safety limit to 13.8v regardless? is this the voltage that should be set for any 4cell LiPo, no lower? Here';s what I have at the moment with a fully charged LiPo...

[DarkButterfly]

Ah, great, but do I set the absolute safety limit to 13.8v regardless? is this the voltage that should be set for any 4cell LiPo, no lower? Here';s what I have at the moment with a fully charged LiPo...

You don';t want the low voltage alarm kicking in too soon, which is why I suggested those settings.

13.8v is what I would consider the minimum, any lower and you risk goosing your batteries or possibly crashing your aircraft.
You don';t want to go below 3.2v a cell ideally.

[rockliffe]

You don';t want the low voltage alarm kicking in too soon, which is why I suggested those settings.

13.8v is what I would consider the minimum, any lower and you risk goosing your batteries or possibly crashing your aircraft.
You don';t want to go below 3.2v a cell ideally.

Hi, so those settings you suggested, 14.8v and 13.8v should be in the ';no load'; boxes, with 13.8v as the second level protection?

[DarkButterfly]

Hi, so those settings you suggested, 14.8v and 13.8v should be in the ';no load'; boxes, with 13.8v as the second level protection?

Yes enter those in the no load boxes 

[rockliffe]

Yes enter those in the no load boxes 

OK matey, thanks. I';ll try with these settings and do some very low test flights tomorrow. Thanks for all your advice, appreciated. In the meantime, it';s over to YouTube