Lack of servicing

• The routine maintenance was not carry out effectively.

Low refrigerant

• If the system is low on refrigerant, either it was undercharged at installation or it leaks.
• If it leaks, simply top up refrigerant is not a solution.
• A pressure test to determine the leak should be conducted, fix any leak, test the repair, and then recharge the system with the sufficient amount of refrigerant.

• The remote controller may be faulty.
• The sensor receiver at the indoor unit may be faulty.
• Power supply failure / disconnected.
• The battery of the remote controller needs replacement.
• PCB / parts faulty.

 INDOOR

• Wailing Noise : The fan belt loosen or faulty fan motor bearings may caused wailing noise generated.
• Strong Airflow Noise : Lack of maintenance service on the air unit is one of the factor that caused noise as the blower was clogged and contributed strong air blowing sound.
• Airflow noise due to “Hi” fan mode : The “Hi” fan mode is for rapid cooling and some noise is expected. It is recommended to switch to “Medium / Low” fan mode after room temperature is achieved and noise will be minimized.

OUTDOOR

• Refrigerant pipes may be too near to each other.
• Screws may not be properly tightened.
• No rubber pads were placed underneath the outdoor unit.
• Compressor weak and generated noise when running.

• Generally, the surrounding smell is absorbed into the fan coil unit and discharges out with the air flow.
• Since the air conditioners undergo constant cooling and air circulation, quick build-up of moisture is likely to take place.
• Inefficient evaporation of the stagnant water can result in mildew, fungi, etc. thriving in your unit.
• This in the long run can result to bad smell.

Faulty Fan / Blower 

• Moisture from air is removed and generally forms condensation on the evaporator coils.
• Airflow allows the coils to stay above freezing so the condensation can run down into a pan and drain away.
• Airflow not moving the fast enough allows the condensation to remain on the coil for too long and also the warmer outside air is less effective in keeping the coils above freezing.
• The combination of the two factors leads to ice formation on the coils.

Air filters, blower or cooling coil dirty

• Similar to the airflow problem caused by a faulty fan on the evaporator potion of the system, debris can also restrict the air entering the outside unit.
• If leaves any type of debris prevent fresh air from being pulled into the chamber where the evaporator is located, the condensation may be able to freeze on the coils before draining away.
• And once the freezing process begins, it will continue. Even turning off the system and allowing it to restore cooling for a short time.
• Unless the cause of the icing is remedied, it will eventually happen again. A dirty air filter could potentially cause this same type of problem.

Low / Insufficient Refrigerant gas 

• When air conditioning refrigerant is running low, it can cause ice to form on the evaporator coil or the suction line.
• It may seem unlikely that low refrigerant causes a component of the air conditioner to ice up, but it’s true.
• When there is too little freon or other refrigerant in the system, part of the coils will be far colder than the other parts.
• This inconsistency will cause excessive condensation in one area of the coil, which then forms ice.
• As the ice forms, it makes it possible for more ice to form. It acts as an insulator and allows the coil to freeze up.

When air conditioning system does not provide cold air, one of the common problem is air conditioning system run down its refrigerant gas.

Therefore, pressure test will be recommended and carried out to discover where the gas leakage is.

Pressure test is a test procedure to identify the leakage area.  This work is not a repair services. It is the fundamental process to define the scope of repair services.

High pressure is induced into the condenser, fan coil and refrigerant piping to detect where is the refrigerant gas leakage point.

Consequence 1

a)If leaking point was found at piping & works is minor and/or the repair location is accessible.

b)Welding works will be perform to seal the leakage or replace short length of the affected area detected . Exclude new piping work if required replacement.

c)Flushing, Purging & Vacuum entire system to evacuate excess air inside the system.

d)Charge-in of R22/R410 refrigerant up to its standard requirements.

e)Testing & Commissioning.

Consequence 2 :

If the refrigerant gas leaking point found at the location that is :

a)beyond repair.

b)the repair location is not accessible.

c)due to wear & tear.

d)very old system.

e)leaking point at equipment i.e. indoor or outdoor unit.

f)obsolete model.

Work out the economical & effective solution :

1.Replace with new set piping.

2.Replace with new equipment.

3.Replace with second hand equipment.

4.Change the new whole set system.

Having unit regularly serviced will maintain the optimum performance of the air conditioning system. When a unit has not been services the build up of dirt prevents air flowing in and out. This will often result in not only poor performance but increased running costs and system failures. Call our expert air conditioning engineers today.