Heating Runs above set Temperature

SmartApps & Automations
1

Hi there

First time posting. We have installed two ceiling mounted AC / Heating units (model AC100RN4DKG/EU) in our UK based Scout Hut. I’ve set up routines for each day as the hut is used at various different times of the day. I’ve set it to come on with auto fan speed at a temp of 20 degrees Celsius. However, when I check the app the temp in the hut is often above 20 degrees but the units are still on. How can I stop the units coming on if the hut is already above 20 degrees?
I don’t want to cool the hut (i.e. use it as an air conditioner).
Thanks

2

Can you post a screenshot of one of the Routines?

3

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I’ve disabled the routine for now as it’s quite warm here

4

So, if I read your Routine correctly, it says:

If Mon 8:30am
Then Turn on Fan with Mode=Heat, Fan Speed=Auto, and Set temperature=20c

So, unless I’m not understanding your Routine, you need some other Routine to trigger on when the temperature is above 20c with an Action to turn off the unit.

6

I’m assuming the “set temperature” is the desired temperature and there’s a thermostat built into the ac unit so that it attempts to regulate the temperature around the set point?

So the original poster is asking why it’s overshooting the set point ?

If that’s the case by how much does it over shoot, or does it just keep on on and on heating?
If it’s overshooting by a small margin then just lower the set point a little to compensate

1 Like
7

Thanks. Yep 20 degrees is my desired temp but it is still running when the hut is over 25 degrees which seems much more than a small margin. I can’t see how I can set up the routine so that it turns off at a set temp - there is only an option to simply turn it off.

8

You shouldn’t have to provided the thermostat in the ac is working.
If for whatever reason the ac doesn’t have a working thermostat you can emulate it in routines .
But you would need a temp sensor for this, or use the one in the ac if it’s available to use it routines as a trigger condition (not an action)

Turn on routine
If time between 9am and 3pm (or whatever)
And
Ac is off
And temp is below 19c
Then
Turn ac on

Time between 9am and 3:05 pm (allow off to run a bit later to avoid it being stuck on)
And ac is on
And temp is over 20c
Then turn ac off

You need to allow some sort of gap between on and off temperatures to avoid the ac being switched on and off too many times