Normally the outdoor unit is already precharged. The manual will state the maximum pipe length allowable without topping up refrigerant (eg 7.5m). But due to the reason you mentioned, the system may need to top up even before reaching the stated length. This is what I mean about longer pipe length, probably short piping 3-4m would still be within the tolerance. This can be theoretically calculated based on the volume you mentioned.

Of course Daikin better than pana, faster cooling and reliable.

They are OEM from china so better consider the spare parts issue, as my fren experience that wait few months to get the spare parts. Can you imagine few months no air cond?

So far I know only Daikin, pana and acson are manufacturing in Malaysia so less worry on the spare parts.

Not sure why Panasonic 2HP tends to be cheaper than Daikin

for 1hp non-inverter type, price wise almost on par with others. but now they got 6 years warranty on compressor.
anyone has any experience with the gree aircon?

for 2.5hp .. better get hisense , cooler than others

Hi guys.
Last saturday I appointed a contractor to relocate my aircon within same room. The 1st the air was cold until yesterday the aircon didn't blow cold air anymore. Also there is no water coming from drainage. Just now I check, there was a ice on the fin inside aircon.

I already contact the installer. Just wondering, what cause of this?

Not true for my experience. I have both System 2s of equivalent cooling specs, Daikin and Panasonic. The Panasonic cools way quicker than the Daikin, not to mention the Pana's indoor unit has a stronger blower as well. The Daikin on the other hand is quieter.

freezing of coil normally suggests low refrigerant pressure that may be caused by
1. dented piping
2. low gas

Based on your description, it seems to be low gas.
It is possible that there may be refrigerant leakage from the system.

Thank you. If the gas leak, does it take time to repair? The installer that I appointed didnt come pulak today. So frustated.

depends where leak and how they plan to rectify
any update on your situation?

Yes. the installer came in. It was loose connection on the copressor. they tight it and refill the gas. working fine now

Any comments on Sharp Plasmacluster Inverter aircond?

guys...need some help
i've got an aircond - 2.0hp which is already very old (heard of the 'i' brand) and it's having some issue now. The said unit must have been around for more than 10 years liao.

So to get to the point, the pipe is concealed inside the wall.
If i were to change a new aircond (2.0hp)...is there any way that they don't need to hack the wall to replace the piping? (as nowadays the refrigerant used is different edi, so surely need to replace the piping)

For save, you can get back the non inverter type. Gas is no different.

Or want to confirm, get a aircon service to help you check the aircon. Than ask him what is that pipe size and what he recommend. But you need to pay the service.

AC installer can advice. Might as well do for all AC you own when it's due for maintenance, ask him to check the pipe diameter for all. Just ensure you record it down so that when you shop, the replacement is suitable.

Piping can be used for smaller HP even if their pipe specification is smaller but never the other way round viz AC with larger pipe specification to fit on smaller pipes.

I've checked with one installer, he say that they don't need to hack the wall...just yank the old piping out and replace it with new one...

It sounds a bit ridiculous for me..seriously, will that work??

That means it's just installed outside like bedroom window?

nope...my piping is concealed....he mentioned can pull out the concealed piping without hacking the wall...does that make sense??

Unless he's done it before possible...but I never heard that before. Possible but still skeptical.