Help needed regarding AC.

Help needed regarding AC.

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Deal Cadet
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AC compressor frequently turns on and off. Like for 3 minutes it cools and then for next 4 minutes it gets turn off, and this cycle keeos repeating. I am using at 27 degree. Is it normal? I googled this problem and came to know about short cycling. Anyone has any idea about this?

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6 Dimers
Cropped75770540910922727
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Try to change the temperature to another lower e.g. 22 or 25 and check for the intervals. If it’s still the same, then maybe it’s another issue. Compressor, gas, outside inside temp deff, exhaust space.. anything. You need a mechanic to know the exact issue as it’s not a diy one.

Care to share the model and year of purchase?

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deb3l wrote:

Try to change the temperature to another lower e.g. 22 or 25 and check for the intervals. If it’s still the same, then maybe it’s another issue. Compressor, gas, outside inside temp deff, exhaust space.. anything. You need a mechanic to know the exact issue as it’s not a diy one.

Care to share the model and year of purchase?

Carrier superia Cyclojet 2018 3 star. I will try to set it on lower temperature in day time and record the time. But is it normal to frequently switch at higher temperature? Also when compressor is on, it make little noisy sound

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deb3l wrote:

Try to change the temperature to another lower e.g. 22 or 25 and check for the intervals. If it’s still the same, then maybe it’s another issue. Compressor, gas, outside inside temp deff, exhaust space.. anything. You need a mechanic to know the exact issue as it’s not a diy one.

Care to share the model and year of purchase?

http://carriermideaindia.com/product/Air-Condit...

I think this one

Cropped75770540910922727
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Rahil42 wrote:

Carrier superia Cyclojet 2018 3 star. I will try to set it on lower temperature in day time and record the time. But is it normal to frequently switch at higher temperature? Also when compressor is on, it make little noisy sound

Yes, it’s absolutely normal. It’s the compressor struggling to set your temp as you are setting it near to the max (30). The ideal temp is 25 (energy saver) and the next one is 22 (in case you want more chill). It also depends on ratio of room size and AC tonnage capacity as it’s an oversize or undersize one.

Your case seems to be a normal one and the functionality seems okay as it’s a fresh one.

Do update after tweaking with the temp.. grinning

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deb3l wrote:

Yes, it’s absolutely normal. It’s the compressor struggling to set your temp as you are setting it near to the max (30). The ideal temp is 25 (energy saver) and the next one is 22 (in case you want more chill). It also depends on ratio of room size and AC tonnage capacity as it’s an oversize or undersize one.

Your case seems to be a normal one and the functionality seems okay as it’s a fresh one.

Do update after tweaking with the temp.. grinning

Outside temperature is showing 28 degree and i set the temperature at 27 degree. May be thats why its happening. I will measure in afternoon and update you.

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Rahil42 wrote:

Outside temperature is showing 28 degree and i set the temperature at 27 degree. May be thats why its happening. I will measure in afternoon and update you.

That’s the case for sure.

Another note, here in DD many dimers posted some valuable ac related posts that may be useful for you. Do check for them when you get some free time.

Spinning globe gif 17
Deal Subedar
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Seems normal only !
For increasing cycle time follow this. It may help to some extent.
Check room vents & avoid metal wardrobes.. if there is any big air vents/gaps nearby doors the cool air escapes out and ac will starts its cycle to make cooler.
Cover sun exposure from room windows with thick cloth
Dont operate ceiling fan and ac simultaneously.. ceiling fan air will evaporates the moisture from ac air.

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Its normal. If you dont want it to turn off then set lower temp or upgrade to a inverter ac.

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deb3l wrote:

Yes, it’s absolutely normal. It’s the compressor struggling to set your temp as you are setting it near to the max (30). The ideal temp is 25 (energy saver) and the next one is 22 (in case you want more chill). It also depends on ratio of room size and AC tonnage capacity as it’s an oversize or undersize one.

Your case seems to be a normal one and the functionality seems okay as it’s a fresh one.

Do update after tweaking with the temp.. grinning

Tried at 25 degree temp, now it cools for around 8 minutes and then turn off for 3 minutes only.

Edit: After one hour, it again started cycling every 4 minute.

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Rahil42 wrote:

Carrier superia Cyclojet 2018 3 star. I will try to set it on lower temperature in day time and record the time. But is it normal to frequently switch at higher temperature? Also when compressor is on, it make little noisy sound

Horrible AC!!! Does not cool at all and does not seem to recognize what the room temperature is.. It is freezing in the morning and hot at night like power saver mode but in reverse.. I have no idea what is wrong with this company since Carrier is one of the oldest AC companies and they have like 1/2 the market in the middle east.. Very unimpressed with them now. I have to manually control the AC.. It also takes a LONG time too cool..

You should start off at like under 20C and after an hour set proper temperature.. Or you could be like me and sleep with the remote in your hand and move it up and down all night long to stay comfortable.. Says its made in 2018.. Imagine now we have real computers that can play any kind of movie, music, what not and communicate etc in a piece like a small pen drive and cost like rs1000.. and then we have this AC which has the brain of a 1980’s twit..

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Rahil42 wrote:

Outside temperature is showing 28 degree and i set the temperature at 27 degree. May be thats why its happening. I will measure in afternoon and update you.

Outside temperature has no bearing on this other than efficiency of cooling.. The AC itself is brain damaged.. I have 2 LG AC’s one bigger and 1 smaller and neither of them behave like this. Even the smaller LG cools better and faster.. Although being a 2010 model uses 10% more power.. The remote also has a function follow me where the temperate is set from the remote control and not at the AC unit.. I think the company has not spent any money on programmers and there are bugs in it.. The follow me controls the temperate of where the remote is at and not where the AC duct is at.. The LG uses a photo sensor for this from the DUCT where the vent is swelled to that part of the room which is warmer for longer periods ie the vent will stop moving at warmer corners than regular.. Kind of strange to see the lowers stop moving at times.. and then starts off again.. This is much more preferable than what I have seen with carrier..

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alienteck wrote:

Outside temperature has no bearing on this other than efficiency of cooling.. The AC itself is brain damaged.. I have 2 LG AC’s one bigger and 1 smaller and neither of them behave like this. Even the smaller LG cools better and faster.. Although being a 2010 model uses 10% more power.. The remote also has a function follow me where the temperate is set from the remote control and not at the AC unit.. I think the company has not spent any money on programmers and there are bugs in it.. The follow me controls the temperate of where the remote is at and not where the AC duct is at.. The LG uses a photo sensor for this from the DUCT where the vent is swelled to that part of the room which is warmer for longer periods ie the vent will stop moving at warmer corners than regular.. Kind of strange to see the lowers stop moving at times.. and then starts off again.. This is much more preferable than what I have seen with carrier..

Bounced everything whatever you said. I am novice and have no idea of technicalities. All I know is it cools fine but only problem I am facing is short cycling

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Rahil42 wrote:

Bounced everything whatever you said. I am novice and have no idea of technicalities. All I know is it cools fine but only problem I am facing is short cycling

How can it cool fine when it is short cycling? That means its not cooling the room enough and restarts shortly to get it cool enough.. ie cool enough for the setting you gave it. Its like trying your luck.. You start cooling and then turn off and wait to see if its at the correct temperature you set, finds out it is not and restarts cooling again..

This is like my programming.. Its not very efficient and takes much longer but it does work..

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alienteck wrote:

How can it cool fine when it is short cycling? That means its not cooling the room enough and restarts shortly to get it cool enough.. ie cool enough for the setting you gave it. Its like trying your luck.. You start cooling and then turn off and wait to see if its at the correct temperature you set, finds out it is not and restarts cooling again..

This is like my programming.. Its not very efficient and takes much longer but it does work..

I feel cool enough to sleep at 25/26 degree. According to you, what is generally accepted cycling time?

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Rahil42 wrote:

I feel cool enough to sleep at 25/26 degree. According to you, what is generally accepted cycling time?

It is most efficient if the cycle time is 0%.. So the compressor is on 100% of the time. That’s why inverter AC’s are far more energy efficient.

But this AC is only ON for a short period of time and it does not cool very well. So you feel hot when it turns off.. But after a few minutes it turns on again and it again cools for a few mins and then turns off.. But it does not cool the room enough until it feels like cooling.. Which I have noticed is around the time you have to get up.

Now my LG 1.6Ton is far too big for the room size.. It would be fine for a hot desert area though and it also has short cycle times.. But it cools properly.. So it also works similarly but the room is cool. I hope you can feel the difference? The LG only turns off once the room is cool even though it also does not stay continuously on.. But the Carrier turns off when the room is still hot no matter what the setting..

Now saying all that, I have noticed my electric bill is lower with short cycling AC’s.. IE my bill for the 1.6Ton is lower than my bill for the 1Ton.. Both being same company and same rating etc.. But the 1Ton is on pretty much the entire time though and only turns off when it is not so hot..

The reason I don’t use the 1.6Ton exclusively is due to when the AC is on, it reduces humidity.. Since the 1Ton is on most of the time, it reduces humidity much more than the 1.6Ton… Even though both cool the room.. Since the 1.6T is short cycling, the humidity in the room is much higher even if it cools faster and electric bill is lower.. And that is why you select proper AC for Room as well as the climate..

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Rahil42 wrote:

Tried at 25 degree temp, now it cools for around 8 minutes and then turn off for 3 minutes only.

Edit: After one hour, it again started cycling every 4 minute.

It seems you are using an oversized one then. What’s the dimensions of your room? Cross check that with the cooling area of this ac variant.

Second, what was the normal temperature outside while you did so? Was it moist outside due to rain etc or humid?? That’s another factor to decide the insta cooling by your unit. I can not see any issues at all unless it’s a faulty component (if the grinning is very high and disturbing each time it resets).

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