strange problem with HK ESC

[og]

so i bought this

https://hobbyking.com/en_us/hobbykingtm-ss-series-90-100a-esc-opto-only.html

 

problem is it wont work when i connect 7s lipo but its fine with 6s

the listing states 2 -7s and also on the esc itself

i just get a continuous beep - any thoughts anyone

Edited By og on 04/07/2017 13:05:45

[Bill_B]

I'm not sure running it on 7s would be wise despite Hobbyking's claims. There's some info that may be useful on RCGroups HERE  (check the link on post #8 too).

Edited By Bill_B on 04/07/2017 13:36:35

[Denis Watkins]

OG, as daft as it sounds a continuous beep means Low Voltage !

[Simon Chaddock]

According to the manual provided by HK

Problem:

After powering up,motor doesn’t work and emits continuous warning tone

Reason:

Throttle stick not at the bottom

Solution:

Move the throttle stick to the bottom and calibrate throttle again.

The minimum throttle position changes moving from 6 to 7 cells?

[og]

simon tried it, thought for a minute you were on to something there simon

 

its meant to have a auto cell detector

 

works fine switching between 3,4,5 & 6 cell

Edited By og on 04/07/2017 18:11:26

Edited By og on 04/07/2017 18:12:14

[Steve Hargreaves - Moderator]

Have you tried lowering the trim too? Some escs won't register low throttle unless the trim is lowered right down too.....

[graeme jones]

OG - have you tried using the 7 cell pack when it's not fully charged? 6 X 4.2 = 25.2 7 X 3.7 is 25.9 7 X 3.6 = 25.2 If it's a voltage issue there should be a point where the ESC can't tell the difference. Otherwise, is there a faulty cell in the pack of 7? And have you put the throttle TRIM all the way down to trigger the arming system?

Graeme

PS I had a similar but unrelated problem with a K-Force ESC. Testing different batteries and props I found it wouldn't work with 9 cells, but was fine with 8 or 10.

Edited By graeme jones on 04/07/2017 19:47:02

[og]

spent all night on this and i am now convinced it is an overvoltage protection thing despite HK claims it is 2 -7s

put 8s thro it - same thing !

[kc]

I notice that my programming card for a different ESC ( Turnigy Plush ) has a setting for the number of Lipo cells and it's the same setting as music - marked " Music/Lipo Cells " the instructions say " The 4 LEDs have different meaning for the normal voltage ESC (works with 2S to 6S) or the high voltage Esc ( works with more than 6S )  It also seems to say that Auto detect is up to 4S and 5S ,6S and 7S need differnt setting of the programme card = different LEDs light up.

Could it be you need to adjust yours using a programme card?

Edited By kc on 05/07/2017 12:02:10

Edited By kc on 05/07/2017 12:06:19

[og]

update - HK issuing full refund