ULTRA Guard 430 Backup - LED Only

The ULTRA Guard 430 optional LED can be purchased as a separate item and can be cascaded one to another.

Can I use the Ultra Guard 430 with a BEC?
Yes you can but you need to be aware that this is a safely device and will cut in if your BEC fails. Some BEC do not like a back feed voltage so do not test the unit leaving the BEC connected and pulling the main flight battery leads off as this will back feed the BEC. Isolate the BEC to test by removing the BEC leads. Do not reset until the UG430 is switched off. This way it will relearn the system voltage and set below it.

What voltage will the ULTRA Guard work over?
The minimum voltage it will set at is 4.8V and set to 4.3V the maximum is 8.7V and set to 8.2V

My Ultra Guard get quite hot is this usual?
There parts get hot during charging. The temp with around 65°c is nothing to worry about. The board has an over-temp protection of 80°c. However it also depends a little bit on mounting position and environment temps. The board is absolutely fine. Nothing to worry about. 

But, if the BEC fails and the Ultra guard takes over, isn't there the potential issue of it supplying voltage "backwards" to the ESC through the RX/FBL unit via the throttle cable since the connector bus on the FBL unit is common and can be powered from any port? I'd really hate to fry a $200+ Castle 120HV ESC. The FBL unit in question is the Spektrum AR7200BX.
Under normal circumstances the UG430 sets below the BEC voltage by 0.5V so no damage can be done as its a lower voltage than the BEC output. If the BEC fails you loss everything anyway so you will crash the UG430 will allow the model to be auto rotated down safely with no damage. 

The LED appears to be on all the time?
This might occur on the earlier UG430 with no diodes on the LED, this is caused by leakage voltage when the set voltage is above 7.2V. We can upgrade the firmware and supply a modified LED if this happens just call us.

My Ultra Guard LiPo is only 90% charged is this right?
Yes, the maximum charge is 90% or 4.2V this is correct.

Can I use more than one LED on the Ultra Guard 430
Yes you can cascade them.

Will the Ultra Guard work with the YGE ESC?
Yes it will work fine.

Will the Ultra Guard work with a LiFe pack?
In theory yes but the LiFe pack and LiFi packs do have a voltage drop issue on load and this might trigger the UG430 into operation. We are working on this and a revised firmware will become available to cope in April May please call the factory for advice.

Will the Ultra Guard work with a LiPo direct on the system no BEC or regulator?
Yes it will. One thing to bare in mind is that if your RX LiPo is older or of poor quality the voltage migh drop very soon on load to a lower set point than the no load voltage. This might switch on the UG430, this would not damage anything but this is the reason.