Frequently Asked Questions
Hopefully the following questions will solve some issues.
1. Why is the air-con 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 acts 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.
2. Why is the air-con 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 / choked. Should no gravity drain be possible
a pump might have been installed to assist in the removal of the condensate. This might have failed. A qualified
technician is needed.
3. Why is the room not cold enough even after the air-con has been running for few hours?
There are a number of possible explanations for this fault.
Reason 1:
The indoor fancoil is dirty resulting in weak dissipation of cool air.
Reason 2:
The outdoor condenser is dirty making it incapable of producing cooling refrigerant.
Reason 3:
There may not be enough refrigerant in the air-conditioning system.
Reason 4:
There might be some problem with the air-conditioning system resulting in non-continuous operation of
the system.
Reason 5:
The desired operating temperature is set too high.
Reason 6:
The air-conditioner installed is under-sized.
4. Why is the air-con not working?
One common reason is that the electrical power is not supplied to the air-conditioner. Perform an initial check on your
electrical panel making sure that the electrical supply to the air-conditioner has not tripped. Upon confirmation of the
availability of electrical supply, a qualified technician should be engaged to have the air-conditioner repaired.
5. What is the advantage of regular air-con service?
Regular service of your air conditioning equipments will provide the following benefits:
Benefit 1:
The air-conditioner will cool better.
Benefit 2:
The electrical consumption of the air-conditioning equipments will be lower.
Benefit 3:
Air-con leaking will be minimised.
Benefit 4:
There will be less need for air-con repair.
Benefit 5:
The air-con equipment lifespan will be prolonged.
6. How often should I have the air-con serviced?
In general, it is recommended that a residential air-conditioner is to be serviced and checked every 6/12 months and
every 4/6 month for commercial air-conditioners. The duration varies with different usage patterns and other
environmental factors. Please seek the assessment of a qualified technician.
7. 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
two weeks. This will helps to improve the air conditioning of the room.
8. Why is the air-con noisy?
Noise is normally generated from:
a.
Vibration noise resulting from dirty indoor fancoil/ outdoor condenser.
b.
Noisy draft resulting from dirty indoor fancoil.
c.
Loose mounting of component in the air-conditioning system.
d.
Faulty parts in the air-conditioning system.
9. 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.
10. Why does the air-con needs chemical cleaning / chemical washing?
Chemical overhaul/cleaning is a very thorough way of cleaning the air-conditioner. When an air-conditioner is badly
clogged/ 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.
11. Why must the fancoil unit be dismantled for chemical cleaning / chemical washing instead of just cleaning the drip
tray?
By dismantling the fan coil unit, the air-conditioning’s individual components can be washed thoroughly. This will help
better clean the unit and also not leave behind chemical residue that may lead to the corrosion of the fan coil.
12. What types of air-con do your company service?
We provide services for different types and brands of air-conditioner. The following are some examples:
Window air-conditioner
Multi Type, Twin and Triple air-conditioner systems
Residential split air-conditioner
Commercial air-conditioner
13. What type of air-con services do your company provide?
We provide a full range of air-con services. The following are the list:
Air-con servicing / Air-con maintenance
Regular contract maintenance
Chemical overhaul
Chemical cleaning / Chemical flushing
Installation of air-conditioning system
Air-con repair
Evaluate and advice
F-Gas Services - R22 Replacement
14. What should I look for when engaging an air-con company (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. Under new legislation all
companies that handle refrigerants must be registered with refcom. Denmanair have succesfully been accepted and
are registered.
Denmanair has been established since 1999 and we have a strong fleet of servicing teams. We provide a 30 days
after service warranty for all jobs rendered. Parts replaced shall come complete with 12 months warranty, providing
they don’t exceed the original warranty date. Please click here for more information.
15. What should be done if there is a refrigerant leakage problem?
If your air-conditioning system has a refrigerant leak problem, simply adding of refrigerant (R22 / R410) is not a
solution. A trained technician should perform a oxygen pressure test to trace and repair the leak. Upon completion of
leakage repair, a correct amount of refrigerant should be topped up.
16. What do I do if I need to contact a reliable air-con company?
Denmanair can resolve all your worries. All our costs are submitted prior to commencement, Should additional parts be
required no work shall commence without confirmation, therefore letting the user remain in constant control of their
expenditure. To contact Denmanair simply call 0800 4798011, Or click the service van icon.
17. Do we need to service the Condenser (outdoors) ? 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 conditions, which require a qualified technician to give
recommendations.
18. Why does ice form on the copper pipes of the condenser (outdoor) ?
There are three possibilities. 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. You
could also have a stuck electrical relay, causing the unit to constantly run. Call a service technician
19. Why is the air-con switching OFF by itself and the air-con indicator light blinking / flashing ?
The blinking / 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 a electrical power reset to get the
aircon temporary working. Continue operation might further damage the air conditioning system.
20. Why does the air-con switch ON and OFF by itself ?
There is a fault with the indoor electronic circuit board. The circuit board controls the operation of the indoor fancoil and
damage caused it to loose its operational control. A repair or replacement of the circuit board is necessary.
21. Why can’t the air-conditioner unit be switched ON using the remote control ?
The fault might lie in the remote controller or the indoor printed circuit board. Try the remote controller on the other
fancoil and if it works, your remote controller is fine. If the fault lies in the printed circuit board, you need to engage a
qualified technician to do a repair on the printed circuit board.
22. What is pressure testing of an air-conditioning system and why it is needed?
When the refrigerant gas in an air-conditioning system depletes away and the air-conditioner needs refrigerant gas, we
can suspect that there is a refrigerant leakage in the air-conditioning system. Pressure testing work will help to identify
where the leak has occured. Normally high pressure is induced into the condenser, fancoil and refrigerant piping to
identify where the leakage is. 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’s a necessary process to define the scope of repair from the result of the work.
Air Conditioner Installation Answers:
1. 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.
Determine the size of the area for which the air-conditioner is require to cool.
Determine the cooling capacity required (refer to question 2 under this section).
Determine the brands and types of air-conditioner you prefer.
Work out and compare your budget.
2. How to determine the cooling capacity require for a room?
An estimate calculation of cooling capacity for a room: Based on High PC output and Personnel.
Area of Room [ Length (ft) x Width (ft) ] x 65 = "Cooling Capacity" BTU/Hr
Example: Room size is 12ft by 12ft. Cooling Capacity = (12ft x 12ft) x 65 = 9,360 BTU/hr
Denmanair shall calculate your cooling duty and provide numerous solutions to meet your requirements. We use PC
software to assist calculations along with 20 years experience of installing air-con systems.
3. What are the brands that your company carry?
Denmanair service all types of air-conditioning. 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
Fuji Electric Air-Conditioner
LG Air-Conditioner
Samsung Air-Conditioner
Sharp Air-Conditioner
Hitachi Air-Conditioner
York Air-Conditioner
General Air-Conditioner
4. What is an inverter air-conditioner?
An inverter air-conditioning system has a variable speed compressor compared to a non-inverter air-conditioning
system. The rotation speed frequency is regulated intelligently to meet specific cooling load requirements. Power
consumption is thus more efficient.
5.What is the warranty on a new air-conditioning system ?
Without a general maintenance contract Denmanair provide 12 months warranty on all parts and labour.
We then offer two types of maintenance contracts.
1. Standard:
This Contract shall provide 36 months warranty on all manufacturer parts and 12 months on all labour.
2. Premium:
This contract shall provide 60 months warranty on all manufacturer parts and 60 months on all labour.
Please note refrigerant leaks are only covered for 12 months
6. I want to consider installing air-con. What do I do?
Call Denmanair and we shall arrange a free no-obligation design and quotation. Once you have received your
quotation and wish to proceed simply call our office. Within our quotation there is an order form. Tick your selection,
add the amounts and return to us. Don’t forget to choose your maintenance plan.
At any time should you require assistance simply call our office.
Once we have received your order we shall contact you to arrange a convenient installation time.
Answers
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