Quote:
Originally Posted by mrd
I should have included this earlier:
I have seen a refrigerant diagram for another Fujitsu system that is nearly identical, but it indicates a receiver between the two heat exchangers in the outdoor unit. I'm not sure if there is one in my system or not, I've read the receiver is where the unit stores the refrigerant during pump down/shipping.
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Wow, look at all the thermistors! I'll bet there is another one checking the outside air input temperature too.
Seems like the Fujitsu controller is a more complex system than the old Sanyo..
And two pressure switches at 4-way valve. I wonder why they used two?
Maybe one for detecting over-pressure, and the other was to detect
the pressure in one of the operating modes.
Or perhaps, just a high and low limit pair.?.
When my Sanyo slowly leaked down, I can't remember clearly, but I don't think it shut down at low pressure. Maybe at the end.
I do recall the system the first day of the failure, it was running like normal, but no heat..
