most times either under/over spec or filter/blower dirty or gas leakage. other causes could br inferior quality gas pipes. even my old daikin r22 suffered from gas leak that it auto shut down. error code showed it as so and an inspection showed that it burst 1ft from compressor. those with compressors that can pump very high vertically esp 2hp and over should get very sturdy pipes.

That's why we need to know the air cond man's wokmanship, it is not an easy task actually. Like inverter air conds need to operate at higher pressure, so must becareful on this. But some people just using low quality copper pipe that causing the leak later on.
And I always install both the units as near as possible.

No such thing lah, nowadays all those installer Aircon man's was learn more smarter than buyer.. Who dunno gas an expansive, they will do 1 thing in proper job or rather than they wanna refill gas for more expansive than they earning installer fee.

ya agree on these points. if you're re-doing next round, check out Inaba Denko, Smartco or Armaflex. These are quite good. The first two marketed as Paircoil. Unless you have supplier contacts in O&G and can get better brands like Kflex cheap.

You only says so, since this statement are come from me. In my place, there are still such people that cheating consumers.

got good got bad. i have a fair share of those.

Did you guy see it, how hard they earned.





How heavy of the outdoor unit when they carry out from the window.





If they cheated, I dun think they want come back again

This post has been edited by kimsim: Oct 20 2014, 03:31 PM

Not denying that these guys don't work hard but even the installers I had contracted before are of varying workmanship quality. Now I only stick to one. Only ask his opinion, buy the AC and he just install it for me. Only time will tell if handiwork or material is good or not. The good thing about SG is they are stringent and BCA/NEA can fine installers so they kiasi or kiachenghu. Pipe quality is consistently good too. Armaflex is mostly what I have seen but not denying there are other brands. In Thailand, there's another brand of piping that's using German coupling technique and it's mostly Alu. Simpler to use but need the right tools.

Also, the experienced installers esp in SG will always ask before hand about the compressor location, window type and size just to predict if compressors speced can go through it or not. Very crucial if using a multi-system.

This post has been edited by halcyon27: Oct 20 2014, 03:38 PM

why all say gas leakage? we use electricity ma not gas

Got power but gas all gone = not cool at all, just blow out hot air only ma.

The gas is the refrigerant (coolant) that exchange the heat from the room. As the heat is taken out the room temperature gradually lowers. Hence the air is "conditioned" (by reference to temperature and humidity). Electricity powers the compressor (change the phase of the coolant from gas to liquid) and pump. The pipe containing the coolant operates under pressure. Inverter (coolant type R410a) operates at 1.6-1.7 times the pressure of non-inverter (coolant type R22).

In the older days, window type is more common. Usually, this is placed below the window. The window type have the compressor and blower linked as if it's a single unit package. Then split units became popular because window type integrated package not practical in all situations (like dining room). In those days in Japan, the prevalent configuration of houses does not cater for AC ledge like what we see today in condos. The compressors may need to be placed on the ground or on the top floor (for clothes drying use). The pipes may need to be long running to reach the upper/lower floors. That means the pump are required to push the coolant very far.

Daikin, Fujitsu, Hitachi, Mitsubishi (Electric and Heavy Industries), National/Panasonic (of the old days) and Sanyo plus other lesser known Japanese brands have very strong pump in the compressor. These can pump 10-20metres depending upon the AC rated horse power. It is for these type of housing configuration that their pumps are specified.

In the older days before the late 1990s, AC pipes are quite consistent in quality. After that Made in China pipes prevailed in quantity. However with these China pipes also means inconsistent quality. Combine these strong pumps and poor quality pipes that can burst with passage of time, you get the picture. Sometimes it's also incorrect installation at the flaring nut (where the pipes connects at the compressor joint) that also cause the leak. I had two cases of poor pipe quality until a friend in M&E industry in SG taught me the basics. After that, I just made sure good spec pipes are used and it's been ok since.

Guys, normally how much do aircondman charge if i wanna put the piping inside the wall? For normal back to back they charge rm150-180, how about if wanna hack into wall?

See the concealed AC piping thread.

Wondering is it possible to put compressor n water outlet in toilet? Blower is on the other side of wall (back to back).

i've got quoted york iplasma 1.0 rm1050, 1.5 rm 1350, 2.0 rm2220 all with standard installation...is the price ok? my area is around subang...tqtq!

Sometimes I really like you as you like to mislead people
To make sure the gas leaks out, I no need to play around with the compressor unit, I only need play around with the piping connection, like the joint I no need to make it tight. Let it slowly leaks out.

What is wrong of my post, never mention about gas leaks at all...

You want to mislead me that air con man won't cheat, I just telling you that they will find an easy to cheat.
You like to look for a way to deny me with your misleading excuse, I'll look for actual fact to burst you
Still, air con man will con us logic still stands Try again and see do you have another excuse to mislead me that air cond man don't cheat.

No point lah... Anyway got warranty.. Even they want cheat me I also got little knowledge on how to install Aircon before.

Even my tool box at home now still got gas meter, screw pipe & nuts with cutting copper tool.



This post has been edited by kimsim: Oct 21 2014, 06:56 PM

In SG they used thicken copper, so should not be gas leaks issue.