With the temp being 9 degrees outside, it seems like your sub
cooling is a bit much. I presume your condensing units are
When I specced some commercial equipment a year or so ago,
they suggested a "headmaster". Which is sure to get some laughs
on this forum (Stormy getting head?). Essentially what it was, a
temp controlled switch that turns the condensor fan on and off.
When it's this seriously cold outside, it's possible for the
refrigerant to come through the liquid line at, well, 9F. Since
that's the outdoor temp. If the liquid line is too cold, the
liquid refrigerant isn't under enough pressure to properly
vaporize. So, it kinda lays there.
And it may have the other problems like solder blockage. But
since it was Ok a few months ago, maybe it's the outdoor cold.
And, a super low outdoor temp may be faking you out, to think
it's low charge.
Christopher A. Young
You can\'t shout down a troll.
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