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Experiences with the Silent Hektik regulator

in 912 / 914 Technical Questions 6 years ago
Hello,

Because I have installed a LiFePo battery I have also installed a special regulator for this type of battery to the alu fire wall of my FK14B: a Silent Hektik F4118.

Because this regulator was overcharging 15.0-16.0 V I have contacted the firm Silent Hektik in Germany. It produces also noise on the radio and causes the DYNON EFIS to be erratic.

They claimed that due to fact I have not installed a cable from the house of the regulator to minus of the battery probably(?) has killed the regulator.

Is this nonsense or not?

BR Jan

  • Re: Experiences with the Silent Hektik regulator

    by » 6 years ago

    Is the VR grounded in some me other way i.e. on the VR housing. Maybe that VR needed an internal ground wire?

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
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  • Re: Experiences with the Silent Hektik regulator

    by » 6 years ago

    It is unlikely to kill the regulator.
    If it were completely ungrounded.it would be like a bird sitting on a high voltage wire.
    Without any ground reference, the voltage would tend to float up to the limits.

    If it were poorly grounded to the Firewall, any voltage difference would be added to the regulator output.
    1 volt on the ground would make a 14-volt regulator appear to be a 15-volt regulator.
    A direct tie from the regulator ground to the battery ensures a solid reference.

    Bond the regulator to the battery and see if the problems disappear.

    Looking at the Hektik site; It appears the regulator requires an external 33,000uF 40V capacitor.
    Is the Cap in place?

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
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  • Re: Experiences with the Silent Hektik regulator

    by » 6 years ago

    Hello,
    Thanks for your replies!
    After experiencing overcharging I have installed a 40000 microF capacitor and a cable form the regulator housing to the minus of the battery. Result: same behavior!
    Because it is unlikely that not having installed a cable from the regulator housing to the minus of the battery would kill the regulator, the SH unit must be faulty.
    Do you agree with this?
    BR Jan
      
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  • Re: Experiences with the Silent Hektik regulator

    by » 6 years ago

    Is this a new installation? i.e. The regulator has never been seen to work for a while and then went bad?

    It would appear that the regulator is now suspect, and replacing it will be the only easy way to confirm this.
    The question would be Why?
    In my opinion, the lack of a direct ground it not a good explanation.

    Concerning the Capacitor...
    Did you just add this? or has it been there all along?
    The Cap is needed to stabilize the regulator when it is NOTconnected to the battery.
    Is there an ALT switch that can isolate the Battery from the Alternator?
    Is the Capacitor on the Alternator-Side of the Alt Switch, such that it remains connected to the Alternator when the battery is disconnected?
    Has the Regulator EVER been operated without either the Battery or the Capacitor connected?

    If the regulator has ever been operated while connected to Nothing, it is a possibility that it could go into oscillation and become damaged.
    A few seconds or much less could be all it takes.

    So many Questions. :)

    Bill Hertzel
    Rotax 912is
    North Ridgeville, OH, USA
    Clicking the "Thank You" is Always Appreciated by Everyone.

      
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  • Re: Experiences with the Silent Hektik regulator

    by » 6 years ago

    Thanks Bill for your replies.
    It is a new installation as I have replaced a Lead Acid battery and the Ducati regulator by a LiFePo4 one and a Silent Hektik regulator.
    The regulator never worked properly. Whether the Cap or grounding the housing of the regulator to the minus of the battery was added or not.
    Grounding the housing of the regulator and Cap is added when the regulator did not worked properly. However it did not have any effect on bad behavior of the regulator.
    No ALT switch.
    The Cap is connected to the R of the regulator and to the minus of the battery (as is the housing of the regulator).
    The battery has been always connected!
    I have installed the Ducati regulator for a short while: no problems or whatsoever. Conclusion: SH regulator is faulty.
    I contemplating to replace the SH regulator by a Shindengen FH020AA.
      
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