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Air conditioning - Any recommendations please??

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Old 25-11-2009, 11:35 PM   #1111
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Invertor cools down faster and provides better cooling comfort. Compressor is much quieter. Major plus point, saves energy. But minus point is repair costs are high.

And if you are staying in a condo (most likey with 2 compressors). All the aircons are pre-installed. If i am not wrong your another sys shld be 3mk75fven + ctk25 x 2 and ctk35 for masterroom. This layout is common for most condo aircon setup...
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Old 26-11-2009, 12:03 AM   #1112
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IMO, changing to R410A system also wil improve too.. air coming out wil be more colder. majority inverter uses R410A..
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Old 28-11-2009, 08:31 PM   #1113
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Hi Bros
Natural Cool technician came today... claimed that nothing wrong with the installation etc. They tune something to do with the temperature in the aircon unit. They said to put temp 22-23 degree with low or medim fan mode - it should cool down the room faster than using maximum fan mode. Since i am overseas, my bro-in-law opened door for them. He said it seemed cooler after doing this. What is the logical behind this?
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Old 28-11-2009, 10:36 PM   #1114
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if at max fan, the temp coming out will not be tat cold. doesnt mean at max fan, the room will be colder, instead the room itself will only cool down faster.

recommended setting will be to put fan on auto or 1 bar.

so, not my idea of putting it at max fan speed.
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Old 01-12-2009, 01:08 PM   #1115
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I Need Help.

Hi,

I have installed my Panasonic aircon on 4/7/09 CUS3S27JKZ and 3xCSS9JKZW by Gain City and paid $3,197 with all pipe upgrading and extended warranty.

Since day 1, the aircon is not cool and called GC to come down to check, the serviceman said the installation is ok, no gas leaking and ask us to call Panasonic for checking.

First time - Panasonic guy come down to pump out all the gas and injeted the new gas in to compressor, it's better for fews days. After that not cold again.

Second time - Panasonic put the device in our room for few days to take the room temperature.

3rd time - Panasonic collect the device and they said need to change the PCB in master room.

4th time - PCB indoor unit changed in master bedroom only, an other 2 rooms is better, can feel the cool, but not that cool.

5th time - The Panasonic guy said they change the PCB from 9k card to 12k instead, but problem still not solve. We suggest they change the compressor and they agreed, so they come down to change the compressor on 5th visit, take place on September 2009.

After compressor have change, the aircon still not cold at all, remote control at 16 degree but room temperature at 27 - 28 degree, we have to suit on the standing fan for high speed.

We have give up on Panasonic, and call Gain City told them that we wish to change to an other brand - Mitsubishi.

Gain City salesman said that we have to top up $600+, so the price for Mitsubishi inverter system 3 - MXY-3A28VA and MSXYGa10VA x 2 and MSXYGA13VA x 1 is $3,800. This price is really too much for us. However, Gain City ask us to talk to Panasonic, if Panasonic agreed to take back their product, then Gain City only will change the brand for us. We spoke to Panasonic for many times and finally they agreed, GainCity not even help us on this. After Panasonic have agreed, we call GC and inform them, so the salesman then inform us we have to top up $600+, the salesman is from IMM branch.

We try to bargain the price with GC salesman, he said he can't decide ask us to spoke to his manager. The manager reduce the price $100 per week, finally we settled at $300 additional that we need to pay Gain City. The manager have delay the pricing matter for 1 months+.

The installation took place on 2/11/09. An other nightmare!! I just counldn't understand why Gain Gity guys will just do the installation only, after finish they not even check whether the aircon is cold or not, finish installation they just rush back.

The aircon not provide cold air for room 2 and we call Mitsubishi guy to check, din call GC. Mitsubishi repair on 7/11/09 and find out the wired connection error, room b connect to room c, that's why one of the room is not cold. After this repair, room 2 have water dripping problem so Mitsubishi come down on 18/11/09 to check and said the valve have problem.

Mitsubishi change the valve on 21/11/09, the water dripping on room 2 already solve but the Master bedroom not cold again. We just switch on the master bedroom aircon at night, the other 2 rooms we din use.

Anyone can tell me what's the problem?? Aircon itself or installation problem??

Now, we are not sure which guy we should call to repair, GC or Mitsubishi?? How they gonna check on installation fault? They just check gas pressure and confirm no gas leaking = installation no problem. Izit like this?

This aircon problem already trouble me for 5 months.

Please help.
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Old 01-12-2009, 01:40 PM   #1116
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wa... my installation taking place in less than 2 weeks time, make me worry about my installation too. however i did not go for GC, spoken to thier saleman, all kind of ah bengs and not really want to serve me.
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Old 01-12-2009, 02:21 PM   #1117
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To gaia888,

i guess the problem shld be the problem wit the installation from GC ba.

by rite all new one shldnt hav any problem wit it. n the product they come out b4 going to consumer i tink have go for testing.
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Old 01-12-2009, 02:39 PM   #1118
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I need help

To gaia888,

i guess the problem shld be the problem wit the installation from GC ba.

by rite all new one shldnt hav any problem wit it. n the product they come out b4 going to consumer i tink have go for testing.
Hi chunliang,

Thanks for your reply.

Actually I did ask Panasonic and Mitsubishi whether the installation have any problem, both said should be no problem.

Panasonic guy just trial and error, they don't know which part going wrong, after so many times of attempt, we finally give up.

I thought after change of brand, the problem should be solve, sigh.. same thing repeat again.

Gain City did come down to check the gas pressure and confirm no leaking on July 2009, that's why all the while we call agents to repair.

Now, I really don't know what should we do.
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Old 01-12-2009, 02:56 PM   #1119
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i tink they mayb didnt follow the rite way of installing, and testing.. or didnt bend the pipe properly.

btw during the change of brand, did GC change all pipings? i mean copper pipe(gas, liquid).

mayb u can do some testing.. like using low or auto fan speed. temperature of 22 degrees. c it improve or not.
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Old 01-12-2009, 03:31 PM   #1120
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I need help

i tink they mayb didnt follow the rite way of installing, and testing.. or didnt bend the pipe properly.

btw during the change of brand, did GC change all pipings? i mean copper pipe(gas, liquid).

mayb u can do some testing.. like using low or auto fan speed. temperature of 22 degrees. c it improve or not.
Hi Chunliang,

No, they din change copper pipe, just remove the indoor units and compressor and replace Mitsubishi. All new piping change on 4/7/09, during first installation.

I always use higher fan speed, and 16 - 18 temperature, at midnight the room temp. will drop to 25 degree the lower. After swithch on for 3 hours, the room temperature still at 27 degree, a bit warm.

I wil go back and test tonight.
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Old 01-12-2009, 11:07 PM   #1121
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I just received my latest utilities bill for Oct to Nov. I was surprised the electricity consumption has dropped by half (892 to 384 kWh)! that is after I have installed the MHI inverter aircons.

As per the histogram in Singpower bill, during the mths (before Oct) when I was still using my old aircons, the electricty usage hover around 800 kWh +-.

This came as a surprise to my family as we always pay about $300 for utilities bill but for this mth, it is $170+. we will monitor the bill for next mth and see if the electrcity usage is maintain at 400kWh+-.

Last edited by tellim; 01-12-2009 at 11:18 PM..
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Old 01-12-2009, 11:33 PM   #1122
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To gaia888, req for joint inspection between installer and agent.
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Old 02-12-2009, 08:01 AM   #1123
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I just received my latest utilities bill for Oct to Nov. I was surprised the electricity consumption has dropped by half (892 to 384 kWh)! that is after I have installed the MHI inverter aircons.

As per the histogram in Singpower bill, during the mths (before Oct) when I was still using my old aircons, the electricty usage hover around 800 kWh +-.

This came as a surprise to my family as we always pay about $300 for utilities bill but for this mth, it is $170+. we will monitor the bill for next mth and see if the electrcity usage is maintain at 400kWh+-.
what brand/model of aircon did u install to replace your old ones?
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Old 02-12-2009, 09:58 AM   #1124
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Old 02-12-2009, 11:17 AM   #1125
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gaia888,

It is extremely unlikely for 2 (3 if include panasonic compressor replacement) independent systems to fail one after another. I suspect the problem lies with installation.
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