I am not an electronics technician and could really use some good troubleshooting advise. My 7A is ready to go with one exception. Every time I turn off the master switch while the engine is running it blows the 2Amp fuse protecting the engine monitor. If the engine is off there is no issue when powering the master switch up and down. There is only one 12V+ lead to the unit and I have checked it from end to end. The unit is powered by the A bus of a two bus system. I thought about moving the power lead to the avionics bus but then I would have no engine instruments until after engine start and system boot, not an acceptable alternative.
My only guess is that when the solenoid powers down it causes a spike that nails the small 2A fuse. If that is the case it could also be damaging other systems that have as of yet not exhibited any issues.
I really would like to have first flight on Memorial Day, any help would be greatly appreciated.
Thanks,
Larry
My only guess is that when the solenoid powers down it causes a spike that nails the small 2A fuse. If that is the case it could also be damaging other systems that have as of yet not exhibited any issues.
I really would like to have first flight on Memorial Day, any help would be greatly appreciated.
Thanks,
Larry