Issues with new AUX R32 AC / Heat Pump
Anyone have experience with the AUX R32 AC / Heat Pump system? Although I'm not sure I prefer the heat pump over the old baseboard heat, it seems to work properly. When the thermostat detects the ambient temperature reaches the desired target the system and fan both turn off as expected when thermostat has fan set to AUTO mode. However, this is not the case when in cooling mode, the fan remains on all the time even though the compressor does stop (the air is noticeably less cold). The HVAC company insists the thermostat is the problem and they say they will replace it. They already agreed to replaceme since the unit was supposed to support WiFi but it does not. The user interface on the unit is awful and I was hoping the app, which requires WiFi, would be easier to use. Should I expect the thermostat to fix the fan issue or is there some other issue with the setup?
Comments
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what t-stat
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Some systems have a delayed fan shut off , pulls alittle more humidity out of the air .. Also make sure the fan is set for auto on the thermostat …
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it gets rid of a bit more of the heat in to the evaporator but it will reevaporate some of the condensate so you get less dehumidification. it is usually a setting on the thermostat in the installer setup.
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I have no experience with the brand of heat pump AUX however that is a popular brand that is manufactured in China. They produce mini-split air conditioners, heat pumps, central air systems, and commercial HVAC equipment sold in many countries, including the United States. Can you be a little more specific on the AUX that you are having trouble with? A model number of the indoor unit, the outdoor unit and the thermostat you are experiencing the trouble with could go a long way to resolving your issue.
Maybe post some photos of the equipment with a close up of the rating plate that has the mode number and other specifications from each piece. also the way the wires are connected to the thermostat.
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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System and thermostat are all AUX. Top image is from the 'manual'.
How the system behaves . . .
MODE : HEAT, FAN : AUTO - Fan is on when heat is needed and stops within a minute when not needed.
MODE : COOL, FAN : AUTO - Fan is on when cooling is needed and NEVER stops when not needed, it is on as long as the system is on.
Was not thrilled about a system from China but the price was significantly lower. Not sure what a rating plate is.0 -
Minisplits fan runs constantly in cool mode , The temperature sensor is the evaporator .. Not sure is there is sensor in the wired controller .
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You purchased a cheap Chinese POS. Good luck getting any tech support and or parts.
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are there any mini splits that aren't made in china?
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Honestly I would call their US customer service line, that controller looks to have a ton of settings and as is typical with mini splits the manual suffers from poor translation. you might just get what you want from customer service
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I don't believe the location they are made is the issue.
It's the company that made them and the lack of support / parts etc.
If you buy a brand name unit, Daikin, Mitsu, Fujtisu, LG, you know you can get help, warranty, parts etc at least for a time. With the no name units, you're on your own. They might work just as good, and even last as long, but, if they don't you're up a creek.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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leaking is more my concern. i am 0 in 4 for refrigeration products made in china retaining their refrigerant.
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Can't help you with Aux, but on Mitsu units that is a setting you have to set. First you have to set the unit to use the thermostat for room temperature sensing then select Fan off for Cooling. These are under the installer menu for the Mitsubishi.
Some of the modulating units never turn the fan off as the compressor always runs.
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From what I read about mini splits I do not think this is what I have. The AC / heat pump system replaced the AC system in my attic, they reused the original ducts. Also installed new dual fans for the outside condensing unit.
The HVAC company is coming to replace the thermostat with another AUX one that supports WiFi. They also claim the new thermostat will resolve the fan issue in cooling mode. I am not confident this will fix it.0 -
Mainly for an FYI . . .
So, the HVAC guy came and swapped the AUX thermostat w/o WiFi for an AUX thermostat with WiFi. I can now control it from my phone. However, it appears that the fan still remains in cooling (or humidify) mode. It turns out this is done by AUX on purpose (he contacted them). They feel that the air should circulate all the time (unless you are heating). I don't understand this but the HVAC guy offered to replace it with a Honeywell (T10?) thermostat which will behave more like the previous when cooling, plus support the heat pump.
Also, if we decide we prefer the old baseboard heat (still used downstairs) I can always install a separate thermostat and not use the heat pump.0 -
I would highly recommend just contacting the company directly to talk with them and see if there is an installer setting that lets you change the fan setting if you really need it to turn off. The fan running constant is typical for mini splits in cooling mode. I know your system isn't technically a "mini split" but it is using the same technology just attached to a fully ducted air handler so it is fairly similar. If your only concern is that something is wrong with the stat I would say based on my own knowledge with different brands, this is how they are designed to perform best. That being said many brands will allow installer settings to set the system back to a "dumb" on/off system, or just hook a 3rd party stat and lose a lot of the tech that you paid for so you can have on/off only operation.
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The HVAC guy looked through the settings but could not find anything. He contacted the AUX people and they insisted this is how the system is designed to work and that only people in the US seem to complain. I just do not like the idea of the fan running 24 / 7, it's a bit loud. I would not want to have to turn the system off and on manually all the time even though the phone app makes it a bit easier to do so.
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you can run a schedule perhaps through the app? I read through the manual for that controller yesterday and it reads to me just like most mini split controller manuals, only about 1/3 of the info is there and the rest is missing, literally lost in translation. I've got a whole list of different installer settings for the brand I deal with that are either mistranslated in the manuals or just missing entirely. It would not hurt anything to check for yourself direct with the source in my opinion
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I have looked at this document that I believe is for the equipment @bkirnum might have. AUX model AHU**HPV1AO manual. There is no easy way that describes the Installer Setup for how the fan is supposed to function in that manual. And it is a little difficult to follow, as the translation is not perfect
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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i used to run the blower on my furnace on the timer on my thermostat for the morning when I would shower to dissipate the moisture from the shower so it would run continuously for a couple hours every morning. I'm pretty sure that was a big factor in the plain bearings in the blower motor wearing out.
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Nothing that a fan relay can correct :)
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there may be several manuals too, sometimes there are overall product manuals or training materials that have info for multiple series of products especially when they don't want to put the effort in to making a manual with the specific features for every product.
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It does appear the have legacy wiring for a heat pump like R, C, Y, Y2, W, O/B, and G with some other things. I cant be sure that it will work with another brand of thermostat, but the fan operation is not always as easy as adding a relay @mattmia2. especially with the inverter technology and variable speed indoor fan motor. you need to get inside the software and select the proper menu item to make it work the way you want it to.
Edward Young Retired
After you make that expensive repair and you still have the same problem, What will you check next?
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i didn't say you could add a relay, in fact i assumed it was some sort of a serial bus t-stat that wasn't using dry contacts.
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