mitsubishi mr slim

[gkron]

Does the MSZ/MXZ model shut down completely when the desired temp is reached or does this model just continue to run until you manually turn it off? I know you can set it on a timer but I guess my question is can I leave it on like a traditional hvac system or not? I don't want it to run continuously but i'd like to keep the garage at a set temp all day....thanks!

 

[TOOL_MONGER]

... i dont recall the model no of the one I just had installed... but it has a wireless control/thermostat... For heat the lowest setting is 59 degrees... i wish it went a bit cooler for periods i wasn't going to be in the shop and dont want to pay to heat it that much.....

 

[Jackfre]

I think you need to set your temp and let the unit decide how it needs to do its thing to maintain your set-point. This is an inverter system. The actual t'stat is mounted on the evap coil and your remote is just a "communicator". As a result the inverter units will spin the fan at a very low level when the stat is satisfied so it can properly sense the room temp. I would suggest you let it run at your desired temp and monitor your electric bill. I think you will be impressed.

 

[pseudorealityx]

The supply fan on a ductless split isn't using much juice. Let it do it's thing.

 

[JasNH]

I just had one installed this summer and use it everyday it litterarly sits 4 feet above me and my computer. We heat a 400sqft cottage with it.

The MR slim units are designed to use less power by running all the time it fluctuates the heat and cool. But does not cycle down all the way. This is intended as cycling all the way down and then back up uses more power.

I cant find the exact reference to this but its on the http://www.mitsubishipro.com website.

One other thing to note, even when this thing is set to heat it still dehumidifies some even though it states it doesn't. There is a specific dehumidify mode as well. At least on my unit.

 

[pseudorealityx]

I just had one installed this summer and use it everyday it litterarly sits 4 feet above me and my computer. We heat a 400sqft cottage with it.

The MR slim units are designed to use less power by running all the time it fluctuates the heat and cool. But does not cycle down all the way. This is intended as cycling all the way down and then back up uses more power.

I cant find the exact reference to this but its on the http://www.mitsubishipro.com website.

One other thing to note, even when this thing is set to heat it still dehumidifies some even though it states it doesn't. There is a specific dehumidify mode as well. At least on my unit.

It does not dehumidify while heating.

 

[Jackfre]

It does not dehumidify while heating.

What he said! I think you may be getting the feeling of less humidity simply due to air flow/circulation.

 

[JakeKohl]

... i dont recall the model no of the one I just had installed... but it has a wireless control/thermostat... For heat the lowest setting is 59 degrees... i wish it went a bit cooler for periods i wasn't going to be in the shop and dont want to pay to heat it that much.....

I have a couple of LG heatpump units - they do not turn off completely. At idle, when there is no demand for heating or cooling, the blowers on the indoor units run at a constant, but very slow, speed. The temperature sensing takes place inside the wall unit so it needs to have air going through it to get an accurate sampling of the temperature. In cooling mode, it continues to direct this little bit of air out into the room. In heating mode, it slips the air guide low directing this air close to the wall and at the floor (so it doesn't create air currents making the room feel cooler).

The outdoor units absolutely turn completely off when there is no demand for heat or cool. They cycle on at a speed as requested by the indoor unit depending on the amount of energy it needs to do it's thing.

 

[DPelletier]

I have a couple of LG heatpump units - they do not turn off completely. At idle, when there is no demand for heating or cooling, the blowers on the indoor units run at a constant, but very slow, speed. The temperature sensing takes place inside the wall unit so it needs to have air going through it to get an accurate sampling of the temperature. In cooling mode, it continues to direct this little bit of air out into the room. In heating mode, it slips the air guide low directing this air close to the wall and at the floor (so it doesn't create air currents making the room feel cooler).

The outdoor units absolutely turn completely off when there is no demand for heat or cool. They cycle on at a speed as requested by the indoor unit depending on the amount of energy it needs to do it's thing.

Exactly. What people need to realize is that while the indoor fan may be running continuously, it takes a very small amount of power compared to the compressor. It really is fairly insignificant and I recommend that all my customers run thier blower motors 24/7 for a variety of reasons.

Dave

 

[RKA]

I pull the breaker on mine since it only gets used once a week (even when it's switched off, it's drawing a constant 260 watts) and it doesn't have a set point low enough where it might be reasonable for me to set it and forget it. Would be nice if they allowed a low set point on these units.

 

[Stevenanto]

I have the msz model. The issue with mine is that when I have it in ac mode the compressor just never stops running. Some people have mentioned that this is due to the placement outside. It is under a dim so it might not be getting enough airflow. But this is never mentioned anywhere in the manual. Mitsubishi never confirmed this to me either.

 

[yeldogt]

I have the msz model. The issue with mine is that when I have it in ac mode the compressor just never stops running. Some people have mentioned that this is due to the placement outside. It is under a dim so it might not be getting enough airflow. But this is never mentioned anywhere in the manual. Mitsubishi never confirmed this to me either.

all my mini splits will shut the compressor off -- I don't have any single head Mitsubishi (both are three head) .. but they shut off. The inside unit will only closed down completely when you turn them off.

 

[My Old Tools]

What he said! I think you may be getting the feeling of less humidity simply due to air flow/circulation.

It does not dehumidify while heating.

It kind of does. Raising the temperature of the air lowers the relative humidity of the air. That's why your house gets so dry in the winter.

 

[Slednut]

I have a MXZ dual outdoor and MSZ indoors, fans run all the time.

 

[PoorOwner]

I know and have seen in person, the is a mode in the mitsubishi (not sure if it applies to all models)

Which is a behavior in low ambient cooling, if outdoor is something under 60 degrees (or there abouts) it will always spin the condenser fan, call or not. Even if the compressor is not running.

This will drive you nuts if you think the unit is broken, because it behaves like a motherboard is broken, (Why the fan never shut off outside!!) when it is in fact the behavior programmed in the motherboard.