|
Posted by Kitch on September 24, 2007, 8:51 pm
>
>
>
>
>
>
> > Kitch wrote:
>
> >>> 208 single phase? Not 230 / 208 ?
>
> >>> --
> >>> Zyp
>
> >> Unit is 208/230 single phase, but 208 single phase is our supply
> >> voltage.
>
> >> Kitch
>
> > Did you by chance disconnect the power [before you swapped wiring] to the
> > unit? Some times, the computers must be "reset" before they will allow
> > the unit to restart. You may have reset the computer board during the
> > swap. The wire swapping may not have had anything to do with it. I
> > honestly don't know if that's the case, but it sounds like it.
>
> A P8 error code is loss of power/com to the outdoor unit, IIRC. You're
> correct an on/off reset will clear the error code.
>
> Joseph
>
>
>
>
>
> > --
> > Zyp- Hide quoted text -
>
> - Show quoted text -- Hide quoted text -
>
> - Show quoted text -
The power was shut off several times in order to check thermisters,
safety switches, compressor contactor, compressor and finally changing
the 208v legs when it finally ran ok. I don't understand why changing
single-phase legs on the outdoor unit had anything to do with it.
Before the unit came on line, the P8 did clear but after 9 minutes of
outdoor failure it then goes back into the P8 warning. When the
inside unit called for cooling during the 9 minutes I did get correct
DC voltage at S1, S2, and S3. I also had 208v (wired 208v which as
you know is ok for this unit) at the junction plug for the outdoor
motor coming out of the board. The fan did not start. I hooked up
another test motor to the plug, which uses a much less amp draw than
the unit's motor and it did not start as well. In thought I may have
had a back bleed of voltage, but due to the internal "FC" (fan
controller in the board itself) it could not be checked. In other
words, it mystifies other mechanics, Mitsubishi and myself. I went
ahead and installed a new board with the same results. I do believe
I'd rather have a "Mini-Chiller". I appreciate both of your input.
"Mysticalbishi"
Kitch
| 
Yahoo! 
Google 
Windows Live 
del.icio.us 
digg 
Netscape 
XML Sitemap