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strange problem with HK ESC

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og04/07/2017 12:51:49
61 forum posts
5 photos

so i bought this


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_B04/07/2017 13:35:15
1147 forum posts
11 photos

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 Watkins04/07/2017 14:25:54
4684 forum posts
135 photos

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

Simon Chaddock04/07/2017 17:49:51
5844 forum posts
3100 photos

According to the manual provided by HK


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


Throttle stick not at the bottom


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

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

og04/07/2017 18:10:41
61 forum posts
5 photos

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


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 - Moderator04/07/2017 19:41:46
6765 forum posts
199 photos

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

graeme jones04/07/2017 19:44:25
277 forum posts
28 photos

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?


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

og04/07/2017 20:54:58
61 forum posts
5 photos

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 !

kc05/07/2017 12:00:42
6914 forum posts
175 photos

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

og05/07/2017 20:39:35
61 forum posts
5 photos

update - HK issuing full refund yessmiley

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