Aston Air

FAQ

• maintenance tips
• FAQ

Maintenance of Your Air Conditioner

Regular maintenance and cleaning are extremely important. It is the best way to ensure trouble- free operation and peak performance. It can also help to avoid a system failure in hot weather when you need it most and also to keep your energy bill from getting out of control.

When should I do maintenance?

Preventive maintenance is a proven method to keep your system in the pink and your home in constant comfort.
Perform maintenance at least four times a year with the maintenance checklist below.

Preventive maintenance checklist

Many service providers provide priority service for their customers who have a service and maintenance agreement with them. Quarterly preventive maintenance will ensure that your system runs as efficiently as possible. The following tasks are performed depending on the type of maintenance and model of the unit.

Outdoor units

Check running parameters and adjust if necessary.
Clean dirt, leaves and debris.
Inspect base pan for restricted drain opening and remove obstructions as necessary
Inspect condenser coil and panel, clean as needed.
Inspect fan motor and fan blade for any wear or damage.
Inspect control box, associated accessories, wiring and connections for any wear or damage.
Tighten where necessary.
Inspect compressor and associated tubing for damage.

Indoor units

Inspect and clean blower assembly.
Inspect evaporator coil, drain pan and condensate drain line. Clean as needed.
Inspect for gas leaks.
Inspect control box, associated accessories, wiring and connections for any wear or damage.
Tighten where necessary.
Clean air filters.

While the system is operating

Listen for abnormal noise.
Monitor for correct refrigerant charge.
Measure indoor temperature.
Measure system pressures.
Monitor system for correct loading (amps).

Provide system operation report and recommend repair or replacement as necessary.

How can I get the most out of the system?

Here are some recommendations to optimize the operation of the system.

Set the thermostat as high as comfort will permit.
During moderate weather, don’t use the system unnecessarily.
Install awnings over windows or sun shield on window exposed to direct sunlight.
Draw blinds to block sunlight.
Don’t place lamps or other heat producing devices beneath wall mounted thermostat. Rising heat will cause
system to overcool the room.

When you think that trouble has occurred

Symptom

Explanation and Check points


Indoor unit
The unit cannot operate.	Is the breaker turned “ON”? Is the power supply plug connected? Is the ON timer set?

The unit cannot be operated for about 3 minutes when restarted.	This protects the unit according to instructions from microprocessor. Please wait.

Mist is discharged from the air outlet of the indoor unit.	The cool air from the unit rapidly cools moisture in the air inside the room and it turns to mist.

The fan stops during the DRY operation.	In DRY operation, the unit operates using the same refrigerant circuit as in COOL operation. DRY operation time has to be reduced in order to lower humidity without much room temperature decreasing. So the compressor sometimes stops and at the same time the indoor fan stops. This prevents water condensed on the heat exchanger from evaporating again.

The swing operation of the HORIZONTAL VANE is suspended for a while, and then restarted.	This is for the swing operation of the HORIZONTAL VANE to be performed normally.

The air flow direction changes during operation. The direction of the horizontal vane cannot be adjusted with the remote controller.	When the units is operated in COOL or DRY mode, if the operation continues with air blowing down for 0.5 to 1 hour, the direction of the air flow is automatically set to position (1) to prevent water from condensing and dripping.

Outdoor unit
Water leaks from the outdoor unit.	During Cool and DRY operations, pipe connecting sections are cooled and this causes water to condense.

Remote controller
The display on the remote controller does not appear or it is dim. The indoor unit does not respond to the remote control signal.	Are the batteries exhausted? Is the polarity (+, -) of the batteries correct? Are any buttons on the remote controller of other electric appliances being pressed?

Does not cool
The room cannot be cooled sufficiently.	Is the temperature setting appropriate? Is the fan setting appropriate? Is the filter or heat exchanger clean? Are there any obstacles blocking the air inlet or outlet of the indoor or outdoor unit? Is a window or door open? When a ventilation or cooker fan is running, the cooling load increases resulting in insufficient cooling effect.

Airflow
The air from the indoor unit smells strange.	Is the filter clean? Is the fan or heat exchanger of the indoor unit clean? The unit may suck in an odor adhering to the wall, carpet, etc and blow out with the air.

Sound
Cracking sound is heard.	The sound is generated by the expansion/contraction of the front panel, etc due to change in temperature.

Burbling sound is heard.	This sound is heard when outside air is absorbed from the drain hose by turning on the range hood or the ventilation fan, making water flowing in the drain hose to spout out. This sound is also heard when the outside air blows into the drain hose in case the outside wind is

Mechanical sound is heard.	This is the switching sound in turning on/off the fan or the compressor.

Water flowing sound is heard.	This is the sound of refrigerant or condensed water flowing n the unit.

When the air conditioner is not going to be used for a long time

Set to the highest temperature in manual COOL mode, and operate for 3 to 4 hours – these dry the inside
of the unit.
Press on/off to stop the operation.
Turn off the breaker and/or disconnect the supply plug.
Remove all batteries from the remote controller.

When using the air conditioner again

Clean the air filter.
Check that the air inlet and outlet of the indoor and outdoor units are not blocked.
Check the earth is connected correctly.