Need to know the thickness of the pipe wall.
Inverter or non inverter doesn’t matter.

Then again, if you don’t know, just install and do vacuum to check ability to keep vacuum.

I have seen gas pressure running on 300 psi on pipe thickness 0.53mm and operating fine. Just that the flare nut joint need to be careful not to over tighten.

R32 is a more efficient gas than r410a.

Beyond that, you will have to look at the number of kwh used on the energy star sticker.

Also, you should look into how insulated your room is. The gaps of the window and door, holes and cracks that can be sealed, changing the lights to a more efficient light like led that produce more light and less heat than incandescent or fluorescent.

Yes. Theoretically that’s the case.

I hardly see people flush the lines to be honest. Mostly just vacuum and that’s it.

I think it is more important to know what happen to the previous aircon that will affect the decision to reuse the pipes or not. If I know it is compressor fail with lots of dirty bits in the line I won’t reuse the pipes. It is impossible to fully flush the pipes especially long pipes.

starter and capacitor got nothing to do with condition of pipes. connection.......that can be easily fixed.

connector means what? the compression joint of the copper coil with the compressor? if that is the case, just cut the last section of the copper coil and solder on a good thick copper coil to ensure a good connection at the compression nut joint.

why looking at new aircon again?

Lel.
Few minutes can determine the problem already.
Common culprit is : dirty evaporator and condenser coil.
Low/over refrigerant
Run capacitor for cross fan motor failing
Blocked inline refeigerant filter
Faulty room/coil temp sensor.


All the above are easy fix.

No need remove whole aircon for cleaning.
The more you disturb the compression joint, the more the chance of leak.
Also there will always be refrigerant loss if you take down the whole unit. If plus, contaminants will enter the copper coil.
Rough handling of the indoor unit will result in bent fin, broken plastic, missing screws all of which will result in problem in future.

Just call back the person that installed it.
A couple of days usually means the connection at indoor leak or outdoor leak.

If he didn’t do a vacuum hole test when he install then boycott him after he fix this.

They just learn from whoever their sifu is.

Hey. If leaks soon after that or leak gas more profit for him. And he can charge more for disassembling and reassembling onto the wall.
He win you lose

Very unlikely copper in wall.

When he cut the insulation to reach the connection you should go up the ladder to inspect. If the joint is oily means he suck at connecting the joint and hence leak.

Oops. It’s vacuum hold test. Type too fast.

Erm....
a custom made stainless steel rectangular pan with hooks for you to tie strings and a snout to attach a hose to drain water would cost around rm 60 depending on the size you want. You will have to measure the size of aircon bottom and add a few inches especially at the front. That will be the size of the pan.

Then you will need some garden hose and garden spray thingy which can be bought at mr diy cheaply.....around rm 30 depending on the length of the hose.
A screwdriver. Few bucks.
A hose that will fit into the snout of the stainless steel pan around 6 - 8 feet depending on the height of the aircon. Maybe around 10 bucks depending on the quality of the hose.
An empty 18 liter paint bucket. Free.
And depending on the height of the aircon a chair you have around or a small ladder which would cost around rm50.
Some strings or rope you have lying around. Either free or a few bucks.

1, is the aircon cold?
2. is there ice forming on the indoor coil?
3. is there ice forming on the discharge pipe(smaller diameter) on the compressor side?

if the answer is yes, no and no, there is no deficiency of refrigerant.

lel............

low refrigerant can have ice forming........

remember the universal gas law? pressure low = low temp? yes......ice can form.......refrigerant colder than normal, but since refrigerant quantity is lower than usual, not enough of refrigerant to carry away heat........hence the paradox of colder than normal refrigerant but a hot room

universal gas law



refrigerant gas pressure temp chart

and think for a while......what would happen if r22 gas pressure is lower than 60 when aircon is running?

1hp enough.
Unless bad insulation or many heat generating person or equipment.

Lol. Cannot be.

Something is wrong with your aircon

3hp for 380sqft..........

and that cooling speed..........meh.........not impressive

Err.

Remote problem?
Infra red receiver problem?
Motor problem?
Capacitor failing?
Faulty pcb?

These are the possible causes..... everything can be fix.... price varies of course.

when you press the fan speed up or down on the remote, does the aircon beep acknowledging the command? if yes then remote and receiver ok........

if motor got rough bearing sound then motor kong soon.
if you set fan speed to the lowest and then off for some time and start with that lowest speed and fan don't spin then it is likely capacitor failing.

What model?