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mini-split does not cool when indoor humidity is to low?


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02-12-18, 10:06 AM   #1 (permalink)  
mini-split does not cool when indoor humidity is to low?

I have a BMKH18-15YN4GA installed in my 440sq studio. The indoor humidity was to high this winter (many times over 70%) so we got a stand alone dehumidifier and kept the humidity around 40%. With the humidity around 40% the mini split would not make cold air(fan would turn on), when changed to heat mode it would work. Last week I tested by turning off the dehumidifier and letting the humidity get around 55%, then turned on the AC and it worked.

So my question does it make sense that mini-split has a min indoor humidity over 50% before it will still cool?

 
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02-12-18, 12:06 PM   #2 (permalink)  
Humidity should not be an issue. Outside temp could be if it was to cold.

 
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02-12-18, 12:08 PM   #3 (permalink)  
Outside temp was like 50-60F if I remember right when it was not cooling.

 
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02-12-18, 03:03 PM   #4 (permalink)  
Are you sure it was in AC mode and not DRY mode? Since DRY mode is to dehumidify, It may have a low limit setting.

From the manual:
When selecting dry mode, the air handler will run in air conditioning, but with a low fan sped to remove excess humidity. In dry mode, the fan speed cannot be adjusted....Fan speed cannot be adjusted under Dry Mod


Last edited by 2john02458; 02-12-18 at 03:05 PM. Reason: Added manual quotes
 
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02-12-18, 07:29 PM   #5 (permalink)  
Yes I am sure that it was in cool mode.

 
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02-12-18, 07:33 PM   #6 (permalink)  
The operating temperature range (Outdoor Temperature)....... for cooling is 64.4 F ~109.4 F and for heating is 19.4 F ~ 75 F.

That means the unit won't go into cooling mode unless the outside temperature is at least 65f.

Submittal BMKH18-15YN4GA.pdf


~ Pete ~

 
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02-13-18, 06:45 AM   #7 (permalink)  
oh ok good to know thanks.

 
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