A few day ago I completed wiring my Rans S-20 power circuits. I turned on the Master and about 30 minutes later smelt something like very hot electrical. The regulator was too hot to touch. Pulled its fuse and let it cool. Am still a ways from running the motor so I just left it until today. Checked the wiring six times, it was correct.
I removed the regulator and the potting compound. The problem was readily apparent. The L and C connections to the circuit board were sloppily soldered and flowed together. Zero ohms between the L and C connections. The L goes to a light used to indicate charging. With the two soldered together, something got very hot.
Very obvious to the casual inspection, as said somewhere in the thread, very poor quality (with a small q) control.
Fixed it, but who knows if something is blown. I will find out when the engine runs.
PS I noted that the R and B+ are soldered to the same land, so the wiring diagram is incorrect in that the connection need not be made externally.
Building Rans S-20 Raven 796S reserved
Going to the light side!
RV-6A 596S flying since '99 (Sold)
HP-18 5596S flying since '89
RV-10 996S tail, quick build wing and slow build fues., - dual Skyviews with complete system, two radio and not much else. Interior completely finished with Zolatone. CF plenum, interior complete. 1624 lbs, FLYING after a 21.5 month build.