[RE-wrenches] Mitsubishi Mini Split fighting with Outback VFX Off Grid

[Ray Walters]

The Outback is not a perfect Sinewave. It still has tiny steps in the 
wave, and when electronics have a problem, its usually with the wave 
form as it crosses zero voltage .  Instead of being instantaneous, it 
has a few milliseconds of time the wave is at the zero crossing, which 
can drive some electronics nuts.  I don't understand the issue beyond 
that, but apparently the electronics use the zero crossing for timers 
and synchronizing, and they're looking for an instant "click", not a smear.
Do the heat pumps work with the generator?  Even though generators can 
have more harmonic distortion, they do usually have a clean zero crossing.
If this is the case, I'm afraid I don't have a cure.  We used to use 
capacitors, but Dan from Exeltech just poo pooed that fix in another 
recent thread, so I don't have any other tricks up my sleeve.

R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified PV Installer,
Licensed Master Electrician
Solar Design Engineer
303 505-8760

On 10/21/2014 8:54 AM, dan at foxfire-energy.com wrote:
> Anyone else had issues with Mitsubishi Mini Split heat pumps fighting 
> with Outback VFX off grid inverters? Everything is brand new. Outback 
> VFX7248, three separate heat pumps. The heat pumps shut down reporting 
> multiple / confusing input commands. The heat pump guys want to blame 
> the power system. I'm thinking bad Sushi. Thanks db
>
>
> Dan Brown
> Foxfire Energy Corp.
> Renewable Energy Systems
> (802)-483-2564
> www.Foxfire-Energy.com <http://www.Foxfire-Energy.com>
> NABCEP #092907-44
>
>
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