Ofna Micro Fail Safe

[bill61]

I just bought an Ofna Micro Fail Safe for my MP-7.5 and when I turn on the receiver and unit, the light flashes. According to the units instructions that means that the battery power is low. I have tested the battery at the receiver and it shows 6volts. Even tested it with a 2 amp load on it and it still is holding at 6volts. When the two servos are put under load and movement they will draw almost 2 amps through the receiver and the battery still holds the 6 volts, yet the fail safe says there is a low voltage condition. Everything works as it should (including the fail safe) when powered up or with the transmitter turned off.
Anybody have this problem? I only rely on the fail safe for radio interference protection and I don't use it for battery power indication as it is in the radio box and out of sight.

 

[jon2]

did you set it up first?

 

[bill61]

Yes, I followed the instructions. I guess that there are alot of kids on this forum that wouldn't think to do that first, but that is how I determined that everything works fine as far as the brakes being applied when radio is turned off. I tried with the unit set to apply full brakes, and with the unit set to apply partial brakes. I have left it in the latter set-up as I don't see a need to apply full brakes. When I get my engine installed I will also be installing a throttle return spring.

 

[ZANDOR]

iam having the same prob.the fail safe is working fine but after about the thrid run.ill hit the gas and there is a delay in the responce.then it takes off???????????????????????????????and yes i did set it.this is the first out of 5 venom i have run that has did this

 

[jon2]

hmm I had that problem when my TX batteries were low and it was ONE battery in my TX that caused it all to foul up. I would check that and also to make sure there is continuity with the leads.

LMK

Jon

 

[RCAeroguy]

Mine flashes too. As long as it works the way it's supposed to, what's the diff?

 

[bill61]

I have checked the power at the receiver and it is 6 volts. I have checked the power with a load of 2 amps at the receiver and it still holds at 6 volts. 2 amps is what the servos max load is at the receiver as measured at the receiver. If there was a bad cell the voltage would drop to around 4.5 volts with a load on the battery pack.
I made an in line connector set that I can measure battery voltage or amperage as it goes to the receiver.

 

[jon2]

do you have another ride you can test it on? Maybe a different battery pack?

 

[bill61]

Checked it with another battery pack and receiver, yet the low battery warning flashes. I gues that I'll just ignore it as I don't use it as a battery checker anyways.
It works perfect except for the power low warning.

 

[Maskale]

i am sure you have it worked out by now, but i use the same unit and it will be a quick flash when it is working properly, and a slow flash meaning it will stay lit just a bit longer when the battery is low, and will stay on when it is engaging the brake, or there is interferance.

 

[bill61]

I guess that you are right. It just doesn't say anything about the rate of flashing in the manual.
The fail safe works perfect.

 

[FastEddy]

Has anyone bothered to contact the manufacturer?
If this issue is common, maybe they have some info to share with us.

-Ed