SO we have a few mini splits at work... we have had issues where the units just turn off and no real indication what is going on. My low Side is at about 120 and High side is 370.. (R410A)...However when the unit firsts start Low Side goes own as far as 75psi and works its way p to 120psi....after i contacted the Manufacturer i told them the AHU inside are set at 62 to 64...but the stand alone Thermostat (controls nothing) shows about 58f in the room. So the Rep stated that the Mini split is set waaaay to cold...That because its set so cold Your exchanging cold air with your already cold coils and causing a Low Pressure Shut off in the compressor... Is this possible? Sometimes it can go days without the units cutting off.. (Just normal on and off operations)
Mini Split...Thermostat Set to cold??
jsal32
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They list themselves as being able to be used with many splits although I'm pretty sure any decent mini split would say wait the rooms 80°, why is the suction pressure so low and shut down.
I've been thinking I don't know if there's a market for it but it seems like mini split manufacturers could easily build a refrigeration indoor unit that ties onto a normal outdoor unit and runs highly efficient refrigeration. It seems to me that folks with wine coolers or meat lockers things like that would be a good market for such a unit.
Just think of the possibilities a refrigeration unit that neither Refrigeration or AC technicians want to diagnose.
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"Is this before or after you fired the parts cannon at it?" - senior tech
Oh come on now, they are not really that hard to fix. Just need to take your time.Just think of the possibilities a refrigeration unit that neither Refrigeration or AC technicians want to diagnose.
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"Is this before or after you fired the parts cannon at it?" - senior tech
I have not had a big problem with service on mini's.
So here at work (middle of the Gulf of Mexico) we got these Connex Temp quarters ...think of em as shipping containers remade to house 4 people. We usually let the people living there set their own temperatures and the AHU unit only goes down to 62 wont go any lower than that...i have set them all at 68 and have not really had any issues but these issues where always erratic and at diff times...no errors not nothing...AHU still throwing air jsut not cold air...all controls on Condenser side still working as if compressor is working but the Thermal Overloads would seem to be open (could not check as they are internal) and after some time compressor would turn on again.. SO the low Set point could then be the culprit huh?
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I agree but the average "technician" is barely able to handle single speed equipment. Most of us here would be fine.
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"Is this before or after you fired the parts cannon at it?" - senior tech
I completely agree.
I would trust because he's new to the profession.
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Not necessarily.
I am new but I am the one that gets sent to the ones that stump others.
Someone here has a signature that says something about the difference between 20 years experience and 1 year experience repeated 20 times over.
I know technicians who mainly rely on symptomatic "diagnosis" and parts swapping and don't really understand how to use a meter. Those technicians should not touch a mini split.
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"Is this before or after you fired the parts cannon at it?" - senior tech
Yeah good point.
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I couldn't remember who it was because I use Tapatalk so I don't see the forum signatures.
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"Is this before or after you fired the parts cannon at it?" - senior tech
I know for sure the resi units will never cool a room to 34*. They will go into limp mode once suction temp gets to low(probably around 38*).....
Maybe something in the commercial line. I dont work with anything commercial so can't say much on that.
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Usually when the return air hits 62 degrees they lock into about 26hz with is like 30 percent.
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