Inverter Type AC in Pakistan (Inverter/Non Inverter Dedicated Discussion)

[roony]

Thanks. I checked the volts, it's at 220.

[pwuser149461611982]

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Split Inverter - Cycling & Temp control issue?

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I have recently acquired a Panasonic DC Inverter Split type 1.5 ton AC model CS/CU-K18PKF super tropical inverter deluxe.

Among you who have measured room temperatures vs. AC cycling can only confirm me on the issue I am facing here with this Inverter.

The cooling itself is really good and chilling. Effective too. In the vent it measures 11.8 to 12 degree C and drops my bedroom temp from 33 C to 26 C right under 15 minutes as measured.

Now the problem part; Nowadays my bedroom temp lingers around 32 to 33 C with 45% humidity. I usually set my preferred temp at 26 C, with Fan speed, Op Mode etc on Auto option and switch the inverter On. It slowly gains speed and takes around 1 minute to fire up its compressor to full speed and on the 15th minute it has already lowered temp down to 25 C (1 degree less than my set temp) on digital thermometer. At this point, I hear the compressor slowing down so is the blower. Here the inverter part starts as the compressor instead of tripping slows down, right? Now this slow paced operation continues ... I mean it continues through the rest of the night... I never see compressor firing up again, fine.. It too being an inverter thing that it maintains the temp by its gradual momentum instead of racing up to full speeds. Thing is, I see the room temp starts to rise moves past 26 C (my set temp) and slowly rises up past 27 C and as far as 27.8 C (which is far greater than my set temp of 26C) however rest of the night it stays varying in between 27 to 27.8 C. The compressor never tries to take it back down to 26 C again. I never see it maintaining closely around 26 C for that matter. Which I think it should ???

Inverters are designed to maintain more comfortable range of temps and while their motor slows down they gradually expend the electricity to keep just enough momentum to stay around in the vicinity of temp set by user. But contrary to that, what I see here is that my inverter is letting it loose and exceed my selected temp of 26 by whole 1.5-1.8 C (27.8 C).

Anybody can confirm how their inverters or specifically the Panasonic econavi inverter models behave in terms of Temperature cycling? It is going to be very difficult to explain all this to my dealer to settle on warranty aspects etc.

[roony]

I was reading up on the sleep function, that if for eg you set your temp at 26, over night it will lower the cooling incrementally, like 26.5,27,27.5 etc. Are you setting it on sleep mode?

[autophile]

Call Dawlance helpline. Don't let street ac wala lay his hands on it.

[autophile]

A bit off topic, but need expert advice. Bought a PEL inverter fridge on Thursday. It has Panasonic compressor. The fridge compartment is super chilling, but freezer is taking some 12 hours or more to make ice. Is it normal for inverter fridge?

I have called the helpline and I think they will be at my house in a couple of days.

[pwuser147983858371]

This is really good refrigerator. I also have PEL it takes time to build up ice in freezer but in fridge it gets frosty quite fast.

[umans]

Yes the proper procedure should be
Leak detection using nitrogen pressure.
Acter leak repair lines evacuation
Then gas charging, as it is 410A so it should be charged in liquid by putting cylinder upside down and lequid to vapor device should be in line with charging pipe.
I'll try to force them to follow above but normally they don't have proper equipment. they are changing 6800 for gass filling.

[midreestaj]

No this one does not have a sleep mode instead it has econavi mode which is off. I would urge you to verify how temps are managed by your inverter by using a digital thermometer.

[pwuser147983858371]

If you get Daikin ACs and get them installed by Daikin technicians they do the same procedure as described above.

[kala_shah_kaku]

I am still not convinced to buy this model that has 6kW cooling capacity. My 1.5 ton Electrolux is already 5.1kW so that's not a huge difference. Since it's a big room I need more cooling capacity. My assumption is that if it even goes upto 11 Amps as mentioned on Panasonic middle east site, it will come down after some time and my Generator can take that much load. Secondly, since R410a is more efficient and consumes less power then a 2 ton Panasonic with R410a would be better in terms of AMP consumption. Check out pv24rkf although it has 6.60kwh cooling capacity but much better in AMP consumption. http://www.panasonic.com/middleeast/en/consumer/home-appliances/airconditioners/wall-type/cs-pv24rkf-5.html
I plan on visiting the market and do a detailed research on actual Amps consumed by 2 ton ACs as well as their cooling capacity.

[midreestaj]

The model you are looking at is more premium model in Panasonic lineup. If it was available I would never touch any other model or brand and buy the 1.5 ton version with eyes closed. Its more efficient and certainly 100k and plus price tag.

[roony]

I checked it. Temp was set to 27and sleep mode activated. Lowest amps it takes is 3.7.

Over the course of 6 hours it raised the temp to 29 and the compressor was off, only 0.2 amps being drawn.

[midreestaj]

Hmm.. its almost same behavior my panasonic is doing. So its all about savings. Not robust cooling throughout the night.

Now I miss non-inverter AC but happy for the savings part of inverter. Kuch lo bhai sath kuch do... Everything​ is on expense of something...

[midreestaj]

Btw do check without sleep mode... How it works without it.

[roony]

Without sleep mode it maintains the temp, have had no issues with this. Im pretty sure with this setting, normal mode, the compressor will remain on at 3.7 amps.

I had not used sleep mode before yesterday, and I won't while temps remain very hot outside.

[midreestaj]

Please do check by thermometer that how accurately it maintains the temp. It would be an insight to inverter functioning. I think inverters do not maintain temps strictly. Conventional 8 years old 1.5 ton in my house keeps temp in +/- 0.5 degree C range

[centos]

Review: GREE Viola 1.5 ton
http://ecostar.com.pk/products/gree-products/gree-air-conditioners/inverter-series/g10-inverters/GS-18VITH1

Room size: 13x16x10

Usage: 12-18 hours a day

I bought it about 2 months ago. They claim EER of 4.0 but I don't know how true that is. Even calculating from their own specification I can't get 4.0.

Output Capacity (W) (H/S/L*) 6200/5275/900
Power Input (W)(H/S/L*) 2300/1620/330
EER 2.7/3.25/2.7

Looks
It looks ok, not as attractive like in the pictures on brochure or on their website. The top panel which is off white plastic doesn't match the bottom white. The glowing arch light is not that bright and hard to notice when the lights are on. The digital display meter is blurry and not as sharp as in the pictures.

Performance
I am satisfied with the performance. It cools the room down like any non-inverter. If we set on 26c it takes about 15-60 mins to cool the room down depending on how hot it was. Normal operating amps are 6-8 @ 200 volts.

After achieving the desired temperature amps comes down to 2-5 amps depending on temperature set. I have done extensive testing on different temperatures from 22 to 28.

If I set the desired temperature at 26c, it keeps it at 25c and stays between 3-4 amps.
If I set the desired temperature at 28c, it keeps it at 26-27c and stays between 2.5-3.5 amps.

So unlike Panasonic people are complaining about, it keeps the temperature at least 1 degree lower than the set temperature. I set it to 26c when I go to bed and 2-3 hours later I turn it up to 27-28 as I feel cold even under the blanket.

The turbo mode is pretty good. I tested for peak amp by setting turbo on 22c. It goes up to 2300 watts as mentioned in specs.

Usually when I set to 26c the amps stay around 6-8 most the time, then comes down to 3-4 amps. If I put it on turbo at 26c it goes up to 9-10 amps and then come back to 3-4 amps.

So the compressor is fully automatic, it calculates how hot the room is and how cool it needs to be and figure out how much power it will use.

Verditct
I got it for 73K and I am satisfied by its performance. It chills the room down and uses less power like any other inverter AC. Throw is good, turbo mode is great to quickly cool down the room. It looks good at night. But if I could go back in time, I'd probably go for LG's dual inverter for 85K, maybe next time.

[roony]

it maintains it within +/-1 deg. I going by the temp sensor in the indoor unit. I have not seen any noticeable variation in comfort level at the set temp,so im confident it maintains the temp good.

[midreestaj]

Good write up bro... I installed an ammeter on my Panasonic. On cool mode temp set to 27 C it maxed out at 9.1 amp and achieved 27 C in 12 minutes. Room temp prior was 32.5 C. Now Iam watching it work and after 1 hour room temp is 28.3 and AC is working at 1.9 amp. Room temp is now constant and I haven't set any Eco mode on it yet.

One thing, I am using an external digital thermo which is quite cheap. Cost rs300. I should cross check it as well. These were my findings for time being.

.

[midreestaj]

Onething to make a note for, my ceiling fan is off and I usually turn that off as it causes sensible temp to be lower than actual. And I always sit where I and the thermometer is out of direct throw of AC. So that I can have static ambient temp of room uninflunced by any other factors.