FAQ

常見問題

Information about Air-conditioning Products

Thank you for your patonage of our products. You can obtain the specifications of our air-conditioning products simply by following the steps below. Before making your choice, please note the following:

  1. The recommended model is for reference only. It is assumed that there is no long-lasting direct sunlight, and the doors and windows can be tightly closed
  2. As cold air will not flow from one compartment to the other, please calculate the air-conditioning requirement for one single compartment only.
  3. Should you choose a model with excessive air-conditioning capacity for a compartment, the compressor will turn on and off frequently (non - inverter type) and increase in part of machine damage easily. On the other hand, should you choose a model with insufficient air-conditioning capacity, the compressor will be running non-stop and cannot completely cool the compartment.
  4. For the climate in Hong Kong is relatively humid, you'd better use the 100BTU per sq.ft. as the basis for calculating the cooling demand.

GENERAL QUESTIONS

Why are there abnormal noises?

If you have purchased the model attached with an anti-vibration cup, check with your dealer whether it has been removed. Otherwise, please request for service. If you are not able to contact the installation department, we will arrange our technicians to assist you.

When should I add refrigerant?

Normally, it is not necessary to add or change the refrigerant unless:



  • You have to replace the compressor, or

  • The copper tubes or the connecting parts are broken and you need to have them repaired and welded.

What is the use of Exhaust Air?

When you find the indoor air is not fresh, just turn the Exhaust Air to “Open”. Then, the exhaust lever will be opened to bring in fresh air and exhaust stale air. But if it is in “Close” position, the room temperature will become lower.

Can I receive the report on the same day?

Normally it takes 2 working days. If required, we can verbally give you the quotation over the phone and our technician can provide you professional advice during the service.

Where can I find the Model and Serial numbers on my air conditioner?

Window-type unit: 
The model and serial information can be found on the left corner of the base pan after you remove the front grille.

Split-type unit: 




















Wall-mounted type Ceiling mounted / Concealed-duct type
The model and serial information is on the right side of the indoor unit. It is not easy for customers to find out the model and serial numbers.

Can I return the warranty certificate without the model number?

No problem. However, customers should keep original receipts of the installation and purchase for future reference. 

Where can I find the Parts Number?

You can find it in the Service Manual or inquire our Customer Services Department. 

Why is there undesirable smell from the air conditioner?

There is no particular reason. Our technician will advise you of the situation after inspection.

LEAKAGE

Why is the wall clammy when my air conditioner is off?

When the air conditioner is on all night under high humid weather, the indoor humidity is extremely low because of dehumidification. If you open the windows immediately after you turn off the air conditioner, the moisture conditioner will rush in thus forming dew on the wall. Under these circumstances, you should not open the windows or unit the room tempature raise up naturally. 

Is it necessary to install drain hose or basin for a window-type or split-type unit?

Usually, a new unit does not have the problem of leakage when the heat is dispersed properly with its auto-evaporating system. But if the humidity is very high or the heat-dispersed unit is clogged with too much dust (thus inhibiting the effectiveness of the auto-evaporation), and there is trash in the base pan after the longtime usage of the air conditioner, there may have leaking. Therefore, it is recommended to install a basin as a precaution.


WINDOW TYPE UNIT 
My unit does not leak. Is that normal?
 

Yes, the window-type unit is designed with evaporating function. With the help of the fans to blow the water on the chassis over the condenser (hot coil), the water is heated up and evaporates in the air. This makes the air conditioner lower its temperature, empower its cooling capacity, save power, and minimize the leakage. 

Does a new unit leak?
No, a new unit does not leak if it is properly installed and the heat is properly dispersed. However, in very humid weather, excessive condensation water will be drained away to the outside through the hose at the back end. 

There are 2 air conditioners with the same model installed at the same place. Why is one leaking but the other not?
 

Even though the location is the same, the slant can be different. Or one of the rooms is not totally enclosed (e.g. the door or window is open), so there is too much water in the air to be collected for evaporation. Excessive condensation will then be drawn off by the hose at the back end. 

Is it normal if there is condensation at the bottom of the unit? 
Yes. When the condensation on the evaporator (cold coil) is passed onto the condenser (hot coil) via the base pan, the base pan will be cooler. It will then condense the vapour of the outdoor hot air into condensation. 

Is it normal if the chassis of a window-type unit contains water? 
Yes. When the weather is very humid, the evaporation process may take a longer time, leaving the excessive condensation in the chassis. So the chassis is made to be durable with anti-rust coating. 

SPLIT-TYPE UNIT 
Why does the front panel of the indoor unit leak even though the air filter is cleaned?

Because of the leakage of refrigerant. You have to find out where the refrigerants leak out from, then repair it and add refrigerant. 
The condenser and drain pipe are blocked up with dust and impurities because of the humid weather.

Is it normal if there is condensation?
It is normal to have condensation in the thermal insulation pipe because the pipe has a very low temperature and condensation will be formed when it meets hot or humid air. But if you find condensation at the air discharge of the indoor unit, please ask for examination.

TEMPERATURE

At what room temperature can I turn on the air conditioner? Why?

The room temperature should be over 18°C. If it is below 18°C, the condenser will become frosty and the compressor of the air conditioner will temporarily stop operating. 

At what temperature should I set my air conditioner?

It depends on the weather. You can set the temperature between 24-26°C or at which you feel most comfortable. 

What is the standard room and outdoor temperature when the air conditioner is on?

There is no absolute answer. The temperature of an air conditioner may vary according to the dimensions of the room, its cooling capacity, the duration that the cooling operation is, the availability of rooftop and the direction of the sunlight etc.

INSTALLATION

How can I dismantle the front grille?

Window-type unit:


AK712/AK911/AMWA12 

1. Pull out the filter from the right, then take off the fixed screws on the front grille.
2.Hold the bottom of the front grille, slightly pull out and then push to the left.

 

AFWA16/AFWA17/AXWA23
The front panel is fastened on the outer box of the air conditioner by the upper clamps and the screws in the lower part. When you take off the detachable cover, you will see two fixed screws at the left and right bottom of the front cover. After unscrewing, push up the front panel and then you can dissemble the whole of it.

Is it normal if the power cord gets heated?

If it is warm and the ampere checked by our technician is normal, everything should be fine.

What kind and size of copper pipes should I use for the installation of a split-type unit?

 For all types and models :





































kW                       BTU Liquid mm (in) Gas mm (in)
2.05-2.65              7,000-9,000        6.35 (1/4) 9.52   (3/8)
3.52-5.00             12,000-17,000 6.35 (1/4) 12.70 (1/2)
5.57-8.80             19,000-30,000 9.52 (3/8) 15.88 (5/8)
10.56 and above   36,000 and above 9.52 (3/8) 19.05 (3/4)


 


 

How do I clean the air filter?

Remove the air filter, wash it with water, dry with a cloth before reinstalling.

What does it mean when the red light of the split-type unit is on?

It means it is functioning properly. If there is any problem, the light will be blinking.

What should I do if the light of a split-type unit is blinking?

If the filter light is blinking, you should clean the air filter and press the “Filter Reset” button. Use the remote control to turn on or off the air conditioner. Do not use the in-house power switch. 

For a ceiling cassette AU unit, if the green light on the front panel is blinking, that means the basin is going to overflow and you need to clean it up.

For the wall-mounted AS series, If the timer or operation light is blinking on a wall-mounted air-conditioner, there may be abnormality detected, please contact your service team.

Why is there bad acidic smell sometimes? (For both new and old units)

This could be caused by many different reasons. Please ask the technician for assistance.

Based on the dimensions of the room, which model will be the best choice?

You can find out more in the following web site. Before shopping, carefully compile a list of what you want the air conditioner to do, where you want to install it and any features you especially want to have. Also be sure of the living environment and the personal habits. 

What is the power consumption for each model? How to count it?

It is measured by watt.
1 unit is 1 kilowatt (kW) per hour. Take AK910FNR as an example, the power is 1.05 kW and every hour it will consume 1.05 unit. Currently, the charges for Hong Kong Electric is $1.29 per unit respectively. If you live on Hong Kong side, the power consumption per hour will be: $1.29x 1.05= $1.35. 

Why does the front coil of a window-type or split-type unit have frost?

Because the air filter is too dusty. When the quantity of the airflow to the condenser is low, the temperature will drop below 0°C and thus make the condenser frost. To avoid this, you should clean the air filter regularly. 

There are 2 air conditioners with same model installed in the same place. Why is one cooler than the other one? (The technician said both function well.)

It should be the problem of return air. One may be faster than the other. The slower one (may be blocked) will have a lower temperature because most of the air it takes in is the cool air just blowing out. This leads to the misinterpretation of the thermostat that the room temperature is cool enough for the compressor to stop operating temporarily from generating cool air. 

I bought a new air conditioner with same horsepower as the old one and installed it at the same place. Why is the new unit not as cool as the old one?

This may be caused by several circumstances. Please request for service and the technician will give you professional advice. 

How long is the power cord?

5 feet (1.52 m) for a window-type unit and 6 feet (1.82 m) for a split-type unit.

ASWA09/12/18J Model

ASWA09/12/18L MODEL

Proccess of Professional Deep Cleaning of Air Conditioners

Technician is conducting deep cleaning for evaporator and condenser of the air conditioner by high-pressure water jets with special purger.

After cleaning the chassis,  technician is applying anti- rust coating imported from Japan on it .

Applying the anti-rust coating from Japan on the wind guard board .

Tins of anti-rust coating from Japan.

This air conditioner has been in use for over 20 years, amazingly durable and truly

Special tester for inverter air conditioners.

Upon completion of cleansing and testing, the air conditioner will be sent back to customer for installation by First Service team.

Technician is testing outdoor unit of inverter air conditioner by special tester.

R410A environmental refrigerant properties and Installation Notes

What is Inverter ?

Operation of Inverter type air conditioner

Functions of Inverter type air conditioner

Intruction of WiFi adaptor installation