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Air conditioning - Any recommendations please??

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Old 05-07-2014, 09:40 PM   #4591
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Hello Averlanche,

I would supposed the chemical procedure is a chemical overhual whereby the whole unit is fully dismantled. Depending on the condition of the unit, it might be possible that the unit is unable to withstand chemical procedure and could endup hurting the compressor.

You might want to weigh the cost effectiveness between doing a chemical overhual and changing a new system. If your unit has been constantly giving you problem then maybe you can consider investing in a new inverter system. Otherwise if your unit has all along been performing well, you might want to take a chance with the chemical procedure.

Best Regards,

Jason Tham

Is chemical cleaning that risky? My 10 year old non-inverter aircon isn't cold, and today the technician said it needs chemical cleaning costing $260 + GST. But because of the age of my aircon there is risk of damaging the compressor afterwards which will cost another $800++ for replacement.

Better to just replace the aircon itself? This is the second technician from different company that said it'll need chemical cleaning, although only one of them warned me about the risk on the compressor.
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Old 05-07-2014, 10:16 PM   #4592
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Hello Behling,

Based on description it does seem like your system is having a gas leak. All Daikin system has only 1 compressor so if there is a gas shortage you are correct that all 3 units will lose it's cooling efficiency.

However even though there is only a singular compressor, it could be possible that the loss of cooling efficiency is first felt by the room that is located furthest from the compressor or the room with the biggest room size. Sometimes the coils of the unit that is not cold is dirtier then the other 2 so cooling efficiency is so reduced for that unit. These could be the possibilities as to why only 1 unit is not cold as compared to the other 2.

In order to detect the location of gas leak you would most probably need a pressure test which could be rather high in cost.

In my opinion, if your system is of age and constantly giving you problems then you might want to consider replacing your system. Both Mitsubishi or Panasonic would work. Do also replace your pipings.

Best Regards,

Jason Tham

Hi guys this is my situation
About 3 mth ago, mum call for aircon servicing (3 unit 1 condenser). 2 weeks after servicing, 1 of the unit gradually take longer to make room cold and soon after totally not cold, other 2 units still working as per normal. Called the tech come take a look he say got leak ask me monitor the situation. He say gas pressure low so top up again. After 1 month same problem. Same unit not cold. Tech say need check for leakage but best to replace all 3 unit and piping. Please advice. Cos I don't understand if leak why the other 2 still functioning shldnt all 3 be not cold?

Please advice daikin system btw. Shld I change to Mitsubishi or pana? If need change initial cost high is not a problem, more impt is running cost and don't kill the earth. Gurus pls advice. Thank you sir
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Old 05-07-2014, 11:15 PM   #4593
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Hi guys, I just installed mitsubishi starmex air con.

and I realize the angle of the wind vane does not allow the air con to blow towards my bed. My bed is just directly below the air con. So the other end of the room is colder as the cold wind is blown to the other end.

Any starmex users can share how you overcome this problem? Thanks in advance!
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Old 06-07-2014, 02:16 AM   #4594
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Hello Akai Ryu,

If the wall is showing signs of mould growth, chances are the insulation is sweating. Other possibilities include gas leak, dirty fancoils, both resulting in condensation and icing which could also contribute to moulding.

As your pipings are concealed, it would be more tricky to ascertain if the mould is due to sweating insulation or pin point the exact location of the leak as water flows with gradient. You would most likely need to have your contractor measure the gas pressure to ensure there is no gas leak and also check the conditions of the fan coils. If the gas pressure is fine and the coils are clean, then chances are the insulation is the problem.

Best that you have your contractor come up for a check for further advice.

Best Regards,

Jason Tham
Thank u for ur advice. The mould growth is near the floor area, conceal area of the cornice area no mould...could it still be insulation problem? TIA
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Old 06-07-2014, 02:41 AM   #4595
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Hello Akai Ryu,

It would depends on how the piping is run. For some cases, the moulding area is where the piping is. There are instances though that water follows the gradient and accumulates at a certain part causing mould growth. For some, depending on the design of the house, other then aircon pipings sometimes there are other pipings that is concealed within fixtures that might cause mould growth.

For some with concealed pipings, if the cooling efficiency of the system is not affected they might choose to put up with the mould and only replace their system together with the pipings when the system gives way however the cosmetic portion would have to be sacrificed.

Given the above, it would be hard to determine without checking if it is due to the insulation so best to have your contractor do a check during your next aircon servicing.

Best Regards,

Jason Tham

Thank u for ur advice. The mould growth is near the floor area, conceal area of the cornice area no mould...could it still be insulation problem? TIA
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Old 06-07-2014, 03:54 PM   #4596
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Hi,
MY 3 yrs old Panasonic inverter shut down after few mins and timer lite blinking in both rooms. What does the fault code H36 means, and is it costly to repair? Thanks.
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Old 06-07-2014, 06:07 PM   #4597
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Hello Rainforest,

For Panasonic Inverters, H36 is tagged to Outdoor Gas Pipe Thermistor Error. This would mean that a sensor is faulty at the outdoor unit. Cost of repair shouldn't be too high. Best to have your contractor come down for a check to ensure there are no other underlying issues.
Do check first if you have purchased extended warranty for your system.

Best Regards,

Jason Tham

Hi,
MY 3 yrs old Panasonic inverter shut down after few mins and timer lite blinking in both rooms. What does the fault code H36 means, and is it costly to repair? Thanks.

Last edited by maxicoolservices; 06-07-2014 at 08:38 PM..
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Old 07-07-2014, 09:41 AM   #4598
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Hi Buddies,

I was quoted $4200/- for the following system and installation material for my HDB (1 Master Bedroom + 3 Bedrooms).

Mit Starmex System 4: MXY-4A28VA c/w MSY-GE13VA x 1 + MSY-GE10VA x 3

Inc. SS Bracket and submission of inst. report to HDB
1 yr inst. warranty

Material Used for installation
1. Copper Pipe: OHCT 22/23 Gauge
2 Insulation: Thermaflex 3/8 Thickness
3. 3 Core Wire: SCM, Keystone or Tai Sin
4. Drainage Line: 13/16MM PVC Pipe

Can i check with you guys if the above quotation is reasonable?

20A DP isolator is available in my service balcony.

Many thanks,
Nadim
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Old 07-07-2014, 03:56 PM   #4599
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jus finished my installation last sat with courts so far so gd but what i see is they pre install the insulation to the cooper pipe outside the corridor and bring the whole thing into the room to lay into the trunking... hopefully is ok since have 3 yrs installation warranty... oh btw is 0.71mm cooper pipe consider g22? thks
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Old 08-07-2014, 10:03 AM   #4600
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I went to Gain City, All Best and Best Tech and was told that mitsubishi starmex is the only model without self-clean.

Just wondering why is everyone still recommending mitsubishi starmex
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Old 08-07-2014, 01:21 PM   #4601
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To Timperial,

Self clean is not those where the aircon will clean by itself.
Its just the aircon running in fan mode to dry the internal of the fancoil so that mould will not build up so fast.

Every aircon can be programmed for this self dry function.
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Old 08-07-2014, 03:02 PM   #4602
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I went to Gain City, All Best and Best Tech and was told that mitsubishi starmex is the only model without self-clean.

Just wondering why is everyone still recommending mitsubishi starmex
selfclean is nothing u can alway switch to fan mode and pre set a timer to off it ltr... i prefer ez clean where u can take out all the parts and clean urself which most aircon can't do that... and the brand more stable
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Old 08-07-2014, 05:01 PM   #4603
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Hi, my aircond are totally not cold at all, it just blow out hot air. It is a system 4 unit, the others 3 aircond are working well. Anyone here can advise what wrong with it?
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Old 08-07-2014, 05:36 PM   #4604
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Hello Xiaoheng,

Per the SWG table, 0.71mm is equivalent to G22, 0.61mm to G23 and 0.81mm to G21 (usually for industrial use).

Enjoy your new system

Best Regards,

Jason Tham

jus finished my installation last sat with courts so far so gd but what i see is they pre install the insulation to the cooper pipe outside the corridor and bring the whole thing into the room to lay into the trunking... hopefully is ok since have 3 yrs installation warranty... oh btw is 0.71mm cooper pipe consider g22? thks
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Old 08-07-2014, 05:44 PM   #4605
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Hello Siew7323,

Is your system an inverter or non inverter?
Possibilities include lack of gas, dirty fan coil, wiring fault, compressor, capacitor fault.
Best to have your contractor come down for a check to ascertain the actual problem.

Best Regards,

Jason Tham


Hi, my aircond are totally not cold at all, it just blow out hot air. It is a system 4 unit, the others 3 aircond are working well. Anyone here can advise what wrong with it?
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