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  #41  
Old 09-29-2018, 04:49 PM
n518jh n518jh is offline
 
Join Date: Jan 2015
Location: Sun City West, AZ
Posts: 21
Default Is a low voltage problem fixable?

My RV12 with 360 hours has shown low voltage for some time. It occurs to me that there might be a loose wire keeping the voltage low. Thoughts? Mark
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  #42  
Old 09-29-2018, 05:09 PM
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tomkk tomkk is offline
 
Join Date: Apr 2014
Location: Port Orange, Fl
Posts: 776
Default

Low voltage was the symptom that has caused me to replace the voltage regulator, at least 3 times. Replacing the VR corrected my low voltage each time. My opinion is heat is killing my VRs. Mine is located in the cockpit under the avionics tray. The blast tube I rigged up seems to be keeping the heat under control, it remains to be seen whether that'll svae the VR.
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Port Orange, Fl
RV-12 N121TK ELSA #120845; first flight 06/10/2015
RV-12 N918EN ELSA #120995 Eagles Nest Project
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  #43  
Old 09-30-2018, 07:45 AM
Shawn25854 Shawn25854 is offline
 
Join Date: Aug 2014
Location: Clearwater, FL / KZPH
Posts: 128
Default

I also have the Silent-Hektik unit and love it. It's been working flawlessly for a LONG time now. Was it expensive, yup, but I won't have to replace it every year or two.

The voltage output ramps up over a 30 minute period. After about 30 minutes I see 14 to 14.3 volts and the unit never reaches 149° and its mounted on the firewall in the engine compartment. I have a Thermax temp strip on it to monitor the temp.

This is a great unit and I also bought 5 of them at once for me and an group of owners. Saved on shipping and got a better price.

We also only bought the voltage regulators, it uses the OEM Ducati connector and is a direct plug in as stated by Major-Tom. Make sure all your spade connectors are tight in the connector before you slip it on.
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  #44  
Old 10-01-2018, 02:18 PM
bpattonsoa bpattonsoa is offline
 
Join Date: Apr 2005
Location: Indepenence, Oregon
Posts: 279
Default Another problem

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.
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Bruce Patton
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.
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