Quote:
Originally Posted by Servicetech
Sounds like poor design that the copper would bust before the overlaod/pressure switch kicked the compressor off. Copper typically requires a LOT of pressure to bust, normally the compressor would trip on overload or throw a breaker first. Have you monitored the pressures when the unit is drawing excessive power? Have you considered replacing the pressure switch with somehting that has a lower pressure cutoff?
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IIRC, when I was doing the repair job, I saw some pretty high pressures.
I was using a short loop (no indoor unit) for my tests.
I had to use the Cooling mode, because heating mode pressures were getting way up there..
I'm not sure about the design, but this basic model might be really old,
and when they upgraded to high pressure R410A, they might have
skipped upgrading the copper for the higher pressure..?.
Not going to change anything yet.. Back when I was an engineer, I learned a lesson.
If a device is working, don't 'fix' it..
These Sanyos are old models, but they are working very well (right now)..