Bought Mitsubishi AC ( Not Mr Slim)

[hasooboy]

From very first day when ever i turn on my ac it makes some gas whistling sound in indoor unit this sound only last for 5 to 8 sec but my concern is gas leakage..technician told me it is normal but if it is normal then why my other ac is quite on startup..
Do any body have this type of sound on startup?

I think that sound is normal, I have experienced the same

Sent from my HTC One S using PakWheels Forums mobile app

[hasooboy]

Sent from my HTC One S using PakWheels Forums mobile app

[saad_farooq]

to Saad,
Clean the filters of indoor unit, use air blower to clean out the fins of indoor and outdoor unit; be careful not to touch the fins, they are very easy to bend. Run your air conditioner, when the compressor turns ON, wait 1 minute, measure the temperature of air going into the indoor unit(at the top of indoor unit, from where you can see the air filter), also measure the temperature of cool air coming out of the indoor unit. A difference of 8C and above is what I remember a good difference. For e.g. your measured temperature of air-in is 30C and air-out is 20C, difference 10C. Check and tell.

These splits that we normally use are "critically charged" units. Their charging is based on the Weight of the refrigerant/gas rather than pressure. Physics say Pressure is directly proportional to temperature, so when temperature is high pressure is high and vice versa. Therefore the correct amount of refrigerant is filled in these units by weighing them. Charging by pressure is possible but that requires temperature measurements, pressure measurements(measuring high side pressure mostly not possible on mini-split since there is no service valve(place to put gauges) on high side), pressure-temperature chart and lastly is not the suggested method of charging for these mini-splits.

First check with soap water if there is leakage at the flare-joints. If no leakage, I would suggest taking the old refrigerant completely out; vacuum and fill again by weight (standard as printed on outdoor unit + compensation for long copper pipes if needed).

Standard weight of the refrigerant is stated on the outdoor unit. Your instruction manual will tell you how much length of copper tube is al-right with the pre-filled refrigerant. Over the standard length(normally 7.5 meter) you will have to add extra refrigerant at the rate of 20gm/meter(might differ in your manual). Use a digital scale, put the cylinder on the scale, read the value, let the refrigerant in the air conditioner until the weight reduces by the amount required.

MHI air conditioners are very good unit, their current input is quite low and the cooling is strong. Their only drawback is that beefy industrial looks!
Has your unit been not performing well since installation or after sometime of installation?

R-22 is ozone-destroyer, please try your best not to release it in air!

I will check about the temperature difference soon and update. I believe the installation was done using standard length and no extra piping was used. Why do you say that I need to completely take out the old refrigerant and fill again? Can't we just add the same quality gas to increase the weight upto the one mentioned in the manual? By the way how can we measure the current weight of gas that exists in the system so as to check if there has been a loss of gas or not? Do I need a scale for that and where do I use that scale for measurement (which valve)? is it a do it yourself thing or should one get a technician? also how much does it cost if I completely remove old gas and fill new?
I believe there has been some problem with the unit since beginning since it did not perform very well especially during very hot days in June and July and seemed almost like no cooling. However during the humid August season it performed quite well.

[compaq9211]

Outdoor unit pipe is making Ice just from where it leaves the nozzle any solution? Will post the picture soon

Sent from my HTC One S using PakWheels Forums mobile app

If the line that is freezing/having ice over it, is the thin one. Then there is a possibility of short of refrigerant or a blockage.
Check for leakage, if found then fix and refill the refrigerant.

[compaq9211]

I will check about the temperature difference soon and update. I believe the installation was done using standard length and no extra piping was used. Why do you say that I need to completely take out the old refrigerant and fill again? Can't we just add the same quality gas to increase the weight mentioned in the manual? By the way how can we measure the current weight of gas that exists in the system so as to check if there has been a loss of gas or not? Do I need a scale for that and where do I use that scale for measurement (which valve)? is it a do it yourself thing or should one get a technician? also how much does it cost if I completely remove old gas and fill new?
I believe there has been some problem with the unit since beginning since it did not perform very well especially during very hot days in June and July and seemed almost like no cooling. However during the humid August season it performed quite well.

When the unit is brand new and sealed, you can rely on what the manufacture has printed. When there is a leakage you will never be certain of how much refrigerant has been lost and thus you never know how much is left in your air conditioner. I have not seen or read anything that tells how much refrigerant is in a system without recovering all of it and weighing it. This is why a good practise is to remove/recover all of the refrigerant from a system after the leakage has been identified. After the leakage is fixed do a proper vacuum. Then weigh in the refrigerant.

Professionals use Super heat and Sub cooling and can identify and rectify the problems. But that requires good grasp of theory and a hands-on experience. And even they recommend the weight procedure as a proper one for these splits. As the manufacturers of air conditioner has done all the testing and found a proper charge of refrigerant for their particular unit.

You connect the refrigerant cylinder through manifold and pipes to the service valve port on the outdoor unit(normally it is their on the bigger copper pipes valve). You place the refrigerant cylinder on the weighing scale. Read the value (for e.g. it is 10.5 Kg.). Lets say you air conditioner requires 1.1 Kg. You then open the valve(s) so that the refrigerant starts to transfer to your air conditioner. The weight of the cylinder will start to reduce, when the reading of the weight scale reaches 9.4 Kg.(10.5 - 1.1 = 9.4) you shut the valve(s) off. Given there was no leakage of refrigerant during the transfer, your air conditioner is now filled with 1.1 Kg.(minus few grams that is in the manifold and manifold pipes).

I personally was unable to find someone with a vacuum pump let alone a recovery unit. For a D.I.Y. you will need tools, even if trying to keep it minimum you will need wrenches, screwdrivers, manifold set, weighing scale, Refrigerant cylinder with gas.
Try to find someone who can do what you want to get done. Cylinder of Honeywell R-22 is for ~7'500/- and is supposed to be original made is usa.

If your unit has not been performing well since the start, read your manual for the minimum clearance around the sides required for the indoor and outdoor unit. They should have adequate air flow to function properly. Also sometimes during installation the copper pipes (if mis-handled) might get crimped, that can also be a reason of not performing well.

Normally the a.c. people here will put a clamp meter on the outdoor unit wire and simply feed in or take out the gas until the compressor is pulling the rated amps printed on the outdoor unit. This seems to work but is not the right way.

[touqeer_khan]

How is it working now a days

[Panther]

It's over five years now and I have no complaints

Sent from my SM-G900FD using Tapatalk

[sanakhan4]

Whats the <a href="http://www.hamariplace.com">Price</a> of haier dc ac it will easily run on generator?

[pwuser156570937888]

Check my email to Haier.
We purchased Haier DC Inverter AC from RubaSEZ outlet in P.D.Khan district Jhelum in midst of summer season 2017. The cooling decreased considerably in 2nd season. We got it serviced but it made no difference at all. This is 3rd season and it became completely useless. It did not make any difference from 16 to 26°C setting. We finally contacted Haier Customer Service via Helpline. As a result, we were contacted by a local technician from PD Khan. He checked it and told that everything was perfect, only gas was low. He was charging Rs.4500 for gas and Rs.500 visit charges. We paid visit charges and called a private technician who charged only Rs.330 for small qty of gas filled in. We provided verification code to Haier Official and complaint was closed.
A few day later, we lodged complaint again because after refilling gas, result was same. I also asked Haier Rep on Helpline for provision of Schedule of Charges by informing that your technician was charging Rs.4500 to refill gas of Rs.330. Rep told that it may be asked from Support Center in Jhelum. Consequently, support center told that "DC Inverter AC is different from others. Gas can be filled only after completely vacating already filled gas."
Anyways, this time, same technicians (local) came after repetitive calls to Customer Service. They check and said that gas pressure was low again, rest was fine. They filled it without vacating already filled gas and said that it was done, again asking Rs.4500 for the same. We asked them to wait for ten minutes so that we check performance of AC. After 10 minutes, we told that there is no improvement. They then said that fan compressor was weak (although indoor wasn't showing any error code). Well, we asked them to change any malfunctioning part as we were ready to pay for it except Compressor which was in warrenty. They kept on pretending and finally vacated the compressor and refilled new gas. We paid Rs.4500+Rs.500(visit charges) again.
The performance of AC didn't improve and although we didn't provide Verification Code, complain was closed as told by Helpline rep.
I raprimended the rep for closing complaint without customer's consent.
We lodged another complaint which was once again closed with fake remarks. This time، Helpline rep told that Senior Technician will visit but Jhelum Support Center was trying to share phone number of already sent technicians.
Once again, we have lodged reminder complain but we are waiting from 6th August to 10th August (working days before Eid Holidays), reminded again and again but none has visited so far. By checking status on your website, it shows details of already closed complaint.

We have two Haier ACs, 01 Enviro UPS and a Haier Refrigerator in our house and after this extremely dissatisfying and poorest Customer Service Experience, We hate Haier. We have decided never to buy any Haier Appliance ever again and also recommend friends not to buy Haier. We will also share our experience on all social media forums where Haier DC Inverter AC has been reviewed. Although other brands are offering 12 years Compressor Warranty, you are offering only 5 years and that also becomes useless because your locally hired technicians may not earn Cash from customer if they take compressor for warranty claim. Attached are testimonials.

[Panther]

That's a very sad state of affairs. Its unfortunate that there are no active consumer courts that can sort out such issues.

[ipkiji]

Sad to hear about you, and this is what normally happens most of the time with unfortunate Customers, Warranty claim or After sales support like things are just on paper and in field you have to face same corrupt ,uneducated, untrained people who are most of the time dishonest and mentally intended to loot innocent customers. similar is the case to educated people who are sitting in compliant management systems for fake or improper closure of Complaints.
Now that you have highlighted your story on Social media and other miscellaneous forums, and you have also taken a very good step by writing to the Customer services by email, hope that Insha Allah your Efforts will be overall beneficial for yourself, for managment of Haier Pakistan, and Definitely beneficial for the potential buyers like us.
Wish that your AC problem is rectified soon..... And may Allah guide all the Pakistani Nation toward right.