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Air conditioning - Any recommendations please??

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Old 16-02-2014, 01:48 AM   #4156
eyz
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Thanks Jason!

Apparently, the only testing they did was removing the signal cable that activate the compressor to determine that the power did not trip when the FCU was turned on.

Previously, I encountered the same problem and called the technician to come down due to the power tripping. However, the power was okay when they came and they didn't manage to find any fault.

This was the 2nd time and the power did tripped when the FCU activates the compressor. The power just tripped in the middle of the night.

No other testing were done, which made me wonder the knowledge and professional level of the technicians.

Should I get another technician to come down to check on the compressor?

Hello Eyz,

Yes you are able to directly power up the compressor to determine if the compressor is really jammed. However most of the time this would not be necessary as technicians should be able to measure using multimeter and coupled with experience they should be able to advise if this is really the case.

However since the switchover has already been done and 2 of the 3 FCU is unused, then you should most probably leave it as that until the last compressor fails before looking into a system replacement.

Concealed pipings are usually a factor to consider during the replacement of aircon. The hacking would be costly and a hassle.

If you are looking into replacement by using back the old pipings/insulation, then Daikin R22 gas model 3MKD or MA56 would be the ones that should most probably fit your requirements.

To use back the old pipings would mean taking a risk on sweating pipings/gas leak and if you choose an inverter running R410A gas, the gas pressure is much higher as compared to R22 which means that your old pipings might not be able to withstand over long periods not to mention the flushing and prep work required to have your old pipes ready for the R410A gas.

Other then that a new system would be expected to last at least 7 years with proper maintainance. It would be a gamble to have your old pipings last that long. Personally I would not prefer to use back existing pipings if possible.

Plastering of walls would depend on individual contractors that does installation. Some might plaster over with white cement however the painting you will have handle. Best to check with the one that is handling the replacement for you.

Drop me a PM if you have more queries.


Best Regards,

Jason Tham
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Old 16-02-2014, 02:30 PM   #4157
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Hello Eyz,

Removing the signal wire to the compressor is to determine that the indoor units (FCU) is in working condition (disconnected from compressor and FCU does not trigger a trip) and if the signal wire is joined back and the FCU causes a trip, it is proof that the outdoor unit is the one that is causing the trip. As for whether the actual fault lies in the compressor, further measurement is required.

As the switchover has already been done, it might not be cost effective to have another technician come down to do another check however this would be up to individual discretion.

Best Regards,

Jason Tham


Thanks Jason!

Apparently, the only testing they did was removing the signal cable that activate the compressor to determine that the power did not trip when the FCU was turned on.

Previously, I encountered the same problem and called the technician to come down due to the power tripping. However, the power was okay when they came and they didn't manage to find any fault.

This was the 2nd time and the power did tripped when the FCU activates the compressor. The power just tripped in the middle of the night.

No other testing were done, which made me wonder the knowledge and professional level of the technicians.

Should I get another technician to come down to check on the compressor?
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Old 17-02-2014, 02:51 PM   #4158
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To derrickgoh,

Both brands are fine. (IMO)
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Old 17-02-2014, 04:22 PM   #4159
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To derrickgoh,

Both brands are fine. (IMO)
Then like that might as well go for Mitsubishi Starmex lor. Can spend the $ saved on other stuff.
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Old 18-02-2014, 12:06 PM   #4160
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All along I thought Daikin air con was a lot more expensive than Mitsubishi. But according to my ID, its only about $100-200 more? Is this true? Assuming he is right, would you invest in a Daikin or Mitsubishi?

I have a relative who is quite knowledgeable about such stuff and he said Daikin is better. Reason is they only make aircon so they are more specialised. But my ID said from his experience Mitsubishi is better.

What do you guys think?
Daikin is better .
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Old 18-02-2014, 12:15 PM   #4161
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Daikin is better .
In terms of energy consumption, speed in cooling the room or what?
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Old 18-02-2014, 12:28 PM   #4162
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I got a quote for ME system 3 inverter, for $3200.
But is it worth to topup $300, for the ME's extended warranty to 5 years.?
Cause the normal warranty is 5yrs compressor, 1yr other parts & labour.

Anyone bought a Starmex ME system and upgrade the warranty?
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Old 18-02-2014, 01:35 PM   #4163
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My 4 aircon and compressor are more than 10 yrs old. I'm thinking of changing it but I do not want to teardown my cabinets to replace the pipes.

is it possible just to change the aircons and compressor only?
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Old 18-02-2014, 02:12 PM   #4164
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My 4 aircon and compressor are more than 10 yrs old. I'm thinking of changing it but I do not want to teardown my cabinets to replace the pipes.

is it possible just to change the aircons and compressor only?
Yes, but will be a risk there. Need to ensure your piping no leakage.
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Old 18-02-2014, 03:14 PM   #4165
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To derrickgoh,

Yah, ME is more value for $.

To kityip,

Ur sys 3 is all 9k btu?
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Old 18-02-2014, 03:16 PM   #4166
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Would like to check with everyone here, the aircon company I am looking at is giving me as default copper pipe (gauge 23) and armaflex insulation (3/8")

Should I go all out and upgrade to copper pipe (gauge 22) and thick insulation? I am thinking when replacing the aircon next time, i can reuse the pipes and insulation.

Would it affect anything if i only upgrade just 1 of them (either piping or insulation)?

I am getting Mitsubishi system 4 inverter.
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Old 18-02-2014, 04:09 PM   #4167
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Warranty and Installation query

How much is installation cost for a standard system 3?

For warranty claims, do you go back to the contractor that help you to install as a package or go back to the aircon supplier?
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Old 19-02-2014, 12:15 AM   #4168
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To kityip,

Ur sys 3 is all 9k btu?
It's 9k, 12k, 18k.
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Old 19-02-2014, 08:30 AM   #4169
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How much is installation cost for a standard system 3?

For warranty claims, do you go back to the contractor that help you to install as a package or go back to the aircon supplier?
See which faulty you claim for as workmanship warranty and AC warranty are different.
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Old 19-02-2014, 08:48 AM   #4170
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Undecided which companies to choose. ;(
Recently anyone did a good aircon installation, which company you use?

In this forum, I read about Hong Tar, Gain City, Coolserve, All Best.
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