FAQ

Air Conditioner General Questions

  1. Why is the air conditioner operating but there isn’t any cold air (air-con not cool)?
  2. Why is the air conditioner leaking water?
  3. Why is the room not cold enough even after the air conditioning been running for few hours?
  4. Why is the air conditioner not working?
  5. What is the advantage of regular air-con service?
  6. How often should I have the air-con service?
  7. Can I do my own air-con maintenance?
  8. Why is the air-con noisy?
  9. Why is the air-con smelly?
  10. Why does the air-con need chemical cleaning or chemical washing?
  11. Why must the fancoil unit be dismantled for chemical cleaning or chemical washing instead of inserting a water tray to wash away the chemical?
  12. What types of air-con does your company service?
  13. What types of air-con services does your company provide?
  14. What should I look for when engaging an air-con company or air-con contractor?
  15. What should be done if there is a refrigerant leakage problem?
  16. What is the advantage of Air Purifying Filter and how often do we have to replace it?
  17. Do we need to service the condenser (outdoor)? If yes, how often?
  18. Why does ice form on the copper pipes of the condenser (outdoor)?
  19. Why does the air-con switch itself OFF while blinking or flashing its indicator light?
  20. Why does the air-con switch itself ON and OFF?
  21. Why is remote control unable to switch ON the air-con?
  22. What is pressure testing and why it is needed?

Air Conditioner Installation Questions

  1. What should I consider when choosing an air conditioner for my premise?
  2. How do I determine the cooling capacity required for a room?
  3. What brands does your company carry?
  4. What is an inverter air conditioner?
  5. What is the warranty on a new air conditioning system?

Air Conditioner General Questions

Why is the air conditioner operating but there isn’t any cold air (air-con not cool)?

The air conditioning system basically comprises of two sections. The indoor fancoil and the outdoor condenser. The indoor fancoil simply act as a blower to dissipate the cooling generated by the outdoor condenser. If there is no cool air blowing out from the indoor fancoil, the outdoor condenser might not be working. A qualified technician is needed to troubleshoot on the outdoor condenser.

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Why is the air conditioner leaking water?

A normal air conditioner will have water condensate in the indoor fancoil and discharge through a draining pipe to the nearest drain. Water will start to leak when the drainage piping is clogged or choked.

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Why is the room not cold enough even after the air conditioning been running for few hours?

There are a number of causes to this situation:

  1. The indoor fancoil is dirty resulting in weak dissipation of cool air.
  2. The outdoor condenser is dirty resulting in incapable of producing cooling refrigerant.
  3. There may not be enough refrigerant in the air conditioning system.
  4. There might be some problem with the air conditioning system resulting in non-continuous operation of the system.
  5. The desired operating temperature is set too high.
  6. The air conditioner installed is under-sized.

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Why is the air conditioner not working?

One common reason is that the electrical power is not supply to the air conditioner. Perform an initial check on your electrical panel making sure that the electrical supply to the air conditioner has not trip. Upon confirmation of the availability of electrical supply, a qualified technician should be engaged to have the air conditioner repair.

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What is the advantage of regular air-con service?

Regular service of your air conditioning equipments will provide the following benefits:

  1. The air conditioner will cool better.
  2. The electrical consumption of the air conditioning equipment will be lower.
  3. Aircon leaking will be minimize.
  4. There will be less need for aircon repair.
  5. The air con equipment lifespan will be prolong.

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How often should I have the air-con service?

In general, it is recommended that residential air conditioner is to be service and check every 3 months and every month for commercial air conditioner. The duration varies with different usage pattern and other environmental factors. Please seek the assessment of a qualified technician.

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Can I do my own air-con maintenance?

The basic maintenance that is recommended is the cleaning of the air filter and outer panel of the air conditioner every 2 weeks. This will helps to improve the air conditioning of the room.

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Why is the air-con noisy?

Noise is normally generated from:

  1. Vibration noise resulted from dirty indoor fancoil/ outdoor condenser.
  2. Noisy draft resulted from dirty indoor fancoil.
  3. Loose mounting of component in the air conditioning system.
  4. Faulty parts in the air conditioning system.

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Why is the air-con smelly?

The smell comes from bacteria formed by microbes in the warm dark humid environment in the indoor fancoil unit. Sometimes when the smell is very bad you may need a more intensive chemical treatment to rectify this problem.

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Why does the air-con need chemical cleaning or chemical washing?

Chemical overhaul or cleaning is a very thorough way of cleaning the air conditioner. When an air conditioner is badly clogged or choked and a general service can’t improve the condition, an overhaul is necessary. In an overhaul, the air conditioner is dismantled part by part and chemically washed.

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Why must the fancoil unit be dismantled for chemical cleaning or chemical washing instead of inserting a water tray to wash away the chemical?

By dismantling the fan coil unit, the air conditioning individual components can be washed thoroughly. This will help to better clean the unit and not leave chemical residue behind that may lead to the corrosion of the fancoil.

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What types of air-con does your company service?

We provide services for different types and brands of air conditioners. The following are some examples:

  • Window air conditioner
  • Casement air conditioner
  • Residential split air conditioner
  • Commercial air conditioner (Daikin VRV system)

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What types of air-con services does your company provide?

We provide the full range of air-con services. They are:

  • Air-con servicing / Air-con maintenance
  • Regular contract maintenance
  • Chemical overhaul
  • Chemical cleaning / Chemical flushing
  • Installation of air conditioning system
  • Aircon repair
  • Evaluation and advice

Please refer to our Services Tab for more information.

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What should I look for when engaging an air-con company or air-con contractor?

When engaging an air conditioning company (air conditioning contractor), you should go for a company that is established and reliable. Find out their profile and experience and their after-service warranty.

We have a strong fleet of servicing teams and we provide a 30 days of after service warranty for all jobs rendered.

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What should be done if there is a refrigerant leakage problem?

If your air conditioning system has a refrigerant leakage problem, simply adding the refrigerant (R22 / R410) is not a solution. A trained technician should perform test to trace and repair the leak. Upon completion of leakage repair, a correct amount of refrigerant should be topped up.

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What is the advantage of Air Purifying Filter and how often do we have to replace it?

Most new model of air conditioner comes with air purifying filter. Air Purifying Filter can remove smoking odour, human smell, impurities and harmful particles in the air condition space. It is recommended that the purifying filter is replaced every three to six months. Or the colour of purifying filter (originally white colour) is changed to dark brown or black. Leaving dirty air purifying filter in the air conditioning system will affect its cooling performance.

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Do we need to service the condenser (outdoor)? If yes, how often?

You need to service the condenser (outdoor air conditioning unit) at least once a year to make sure the air circulation of the unit is not blocked. It can affect the cooling efficiency, a shorter compressor life and higher electrical consumption. Sometimes, it is subjected to environmental condition, which requires a qualified technician to give recommendations.

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Why does ice form on the copper pipes of the condenser (outdoor)?

There are two scenarios. Ice-forming on the discharged pipe is due to insufficient gas in the system. Ice-formation on the suction pipe could be caused by a dirty fancoil unit or, a dirty filter or, the indoor unit blower is not rotating.

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Why does the air-con switch itself OFF while blinking or flashing its indicator light?

The blinking or flashing of indicator light indicate that there is a fault with the air conditioning system. Hence the air conditioner switches off by itself. A qualified technician is needed to diagnose and repair the fault. As this is a protective function to prevent the air conditioner from further damage, it is not advisable to do an electrical power reset to get the aircon temporary working. Continued operation might further damage the air conditioning system.

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Why does the air-con switch itself ON and OFF?

There is a fault with the indoor electronic circuit board. The circuit board controls the operation of the indoor fancoil and damages may have caused it to lose its operational control. A repair or replacement of the circuit board is necessary.

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Why is remote control unable to switch ON the air-con?

The fault might lies in the remote controller or the indoor printed circuit board. Try the remote controller on other fancoil and if it work, your remote controller is fine. If the fault lies in the printed circuit board, you need to engage a qualified technician to do repair on the printed circuit board.

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What is pressure testing and why it is needed?

When the refrigerant gas in an air conditioning system depletes away and the air conditioner needs to regularly top up refrigerant gas, we can suspect that there is a refrigerant leakage in the air conditioning system. Pressure testing work will help to identify which is the leakage area. Normally high pressure is induced into the condenser, fancoil and refrigerant piping to identify where is the leakage. Further repair work will be quoted upon identifying the leakage area.

Note: Pressure testing work is a testing process (not repair work) to identify the leakage area. This work will not be able to rectify the fault but it is a necessary process to define the scope of the repair work.

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Air Conditioner Installation Questions

What should I consider when choosing an air conditioner for my premise?

The following are some factors you should consider when choosing an air conditioning system:

  • The size of the area for which the air conditioner is require to cool.
  • The cooling capacity required (refer to the next question).
  • The brands and types of air conditioner you prefer.
  • Your budget.

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How do I determine the cooling capacity required for a room?

An estimate calculation of cooling capacity for a room:

Cooling capacity (BTU/h) = Area of room [ length (ft) × width (ft) ] × 65

Example: Room size is 12ft by 12ft.

Cooling capacity = (12ft × 12ft) x 65 = 9,360 BTU/h

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What brands does your company carry?

Our company carries a range of air conditioning brands. The following are some:

  • Daikin Air Conditioner
  • Mitsubishi Air Conditioner
  • Carrier Air Conditioner
  • Sanyo Air Conditioner
  • Panasonic Air Conditioner
  • Toshiba Air Conditioner
  • Fujitsu Air Conditioner
  • LG Air Conditioner
  • Sharp Air Conditioner
  • York Air Conditioner

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What is an inverter air conditioner?

An inverter air conditioning system has a variable speed compressor as compare to non-inverter air conditioning system. The rotation speed frequency is regulated intelligently to meet specific cooling load requirement. Power consumption is thus more efficient.

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What is the warranty on a new air conditioning system?

The general warranty given by most manufacturers are one (1) year on general parts and five (5) years on compressor.

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