top of page

HVAC Questions

Here is a collection of some of the most often asked HVAC questions by users of air conditioners or heat pumps. This is not an entire list, and more will be added as time goes on. If you have any further questions that are not addressed here, please contact us and we will try our best to respond.

Q1: When I turn on the cooling mode on my ductless split air conditioner, the indoor unit leaks water. What are the potential issues and their solutions?

When the air conditioner is turned on, the moisture in the room is removed by condensation on the indoor unit's cooling coil. The condensed water drips into the drain pan beneath the coil.

The water is subsequently evacuated from the drain pan by gravity or a condensate pump into the drain line that travels from the interior unit to the outside of the house. To connect the drain hose to the drain, additional PVC plumbing may be required.

Examine the following:

a) If the unit is gravity-fed, make sure the drain pan is at the proper elevation. It should have a slight incline to allow water to flow down and into the drain hose, where it will be discharged to the outside of the building.

b) If the unit is drained with a condensate pump, verify that it is operational. If the indoor unit is situated deep in the building and the distance to drain the water from the pan is too great, the condensate pump is an optional accessory. The pump aids in the removal of water from the drain pan by providing suction.

c) The drain hose could be clogged or unclean, preventing the water from draining. To clear the obstruction, you'll need to blow or use a vacuum.

d) Remove and clean the air filters in the interior unit's return air, as filthy air filters hinder air flow.

Q2: My air conditioner is displaying error codes such as E3, E4, and others. The LED on the timer is blinking. What is the issue with this HVAC concern and what is the solution?

When there is a problem with the air conditioner unit that needs to be fixed, each manufacturer has its own set of error codes. These error codes are intended to highlight a specific issue so that the user or technician may immediately identify the source of the issue and offer a solution.

An error code E1, for example, could signal that the system is low on refrigerant gas and needs to be replenished. The room sensor may have been disconnected, resulting in Error E2.

If an error occurs, check the operating handbook that came with your item. A table containing a list of error codes and their associated problems/solutions is frequently present.

If the error codes aren't present, you'll need to contact the dealer or manufacturer for the technical documentation for that model.

Q3: I'm using R22 as a refrigerant. Is it possible to switch to R410A as a refrigerant?

No, each refrigerant has been engineered to operate at a specific pressure while in use. These two refrigerants are not interchangeable since they have different characteristics. If you alter the refrigerant, you risk damaging the compressor and other components.

Q4: Is it possible to convert my inverter air conditioner to a traditional air conditioner by replacing the control board and rewiring the unit?

No, you won't be able to accomplish that because the inverter compressor can only be controlled by the manufacturer's specialized control board. Furthermore, the system's working circumstances have all been designed to rely on the inverter unit.

Q5: I'd want to ask you another HVAC inquiry. Is it necessary for me to get an inverter air conditioner?

Ans: A DC inverter air conditioner is the most recent technology on the market, and it has been shown to save energy while providing improved comfort to the room's occupants. Depending on the load needs, the compressor speed can be adjusted from low to high.

Though it is more expensive than a standard air conditioner, it is highly suggested that you get one if you have the funds because you will recoup your investment over time owing to the lower electricity bill you would pay.

Q6: The power supply in my country is 220V AC. When the voltage drops to 150V AC, would the DC inverter air conditioner still work?

Ans: In regards to your HVAC question, you'll need to consult the manufacturer's manual to determine the lowest working voltage at which the unit may still function. To account for this dip, several manufacturers have engineered their control boards to allow the unit to operate at low voltage. The air conditioner may not work if this is not done.

Q7: Does an on-off type compressor draw the same amount of electricity while automatically turning on and off as it does when the machine is first turned on?

When the compressor switches from off to on, it draws a current known as in-rush current. When compared to the rated running current, it can be several times higher. The current isn't always the same when the compressor starts up because it depends on which phase the current is in at the moment.

When this happens, you may notice that your fluorescent light blinks.

It's because the compressor consumes a lot of energy from the power source, which causes the voltage to drop when it turns on.

11 views0 comments

Recent Posts

See All


  • Twitter
  • Linkedin - Gree Direct
  • Facebook - Gree Direct
  • Instagram - Gree Direct
bottom of page