Here are some basic split airconditioner control troubleshooting guide that may help you to understand more of the electronics control of your equipment. This is a non-inverter type of control.Take note that you need to have a good electrical knowledge to do this as the power supply to the printed circuit board is LIVE. It is always a good practice to disconnect and isolate the power supply when you are troubleshooting the control board. If you are not sure, get a qualified technician to check your unit. A split air conditioner is also commonly known as ductless split or mini split where there is an outdoor unit and an indoor unit. The outdoor unit consists of a compressor, a fan and the condenser. This is the place where heat from the indoor is transferred from the indoor to the outdoor and is rejected to the surrounding. The indoor unit basically consists of an evaporator, an expansion valve and a fan. Copper pipes are used to connect the flow of refrigerant between the indoor unit and the outdoor unit.

The power input can come from the indoor unit to the outdoor unit. The non-inverter split air conditioner basically consists of a ON/OFF compressor where the compressor is either ON fully or OFF fully. The inverter based compressor can regulate the speed of the compressor depending on the load required.Here is the breakdown of the typical controller for better understanding.Main Control Printed Circuit BoardThe main control board can be divided into input power supply, a microcomputer controller integrated circuit, temperature sensor inputs and outputs to control the compressor, indoor fan speed, outdoor fan speed and air swing. The AC input from the mains has to be converted to DC voltage where it can be used to power the integrated circuits and drivers in the electronics circuit. There are two ways to do this. One is by using a step down transformer where the AC voltage is stepped down to voltage such as 25V AC or 12V AC. This voltage is then converted to DC by the use of diode bridge as rectifier and electrolytic capacitor to smoothen the rectified voltage.

A 3-pin voltage regulator is used to get a fixed 5V DC or 12V DC power supply. This low voltages are used to power the microcomputer, DC relays and other integrated circuits in the circuit. A simple linear power supply circuit. The other method is to use switched mode power supply or SMPS which makes the dimension of the printed circuit board smaller as the bulky transformer can now be replaced with a smaller transformer. This design is becoming more common as the quest for smaller space is becoming more critical.There is usually a surge absorber or a varistor connected across the input of the power supply. This device acts to protect the internal circuit in the event of lightning or power surge. When the power input to the device exceeded its voltage rating, it will clamp the voltage by bypassing it to the input source. This is one device that can be easily damaged if the power surge or lightning occurred beyond its maximum rating.A fuse is placed in series with the input power supply to cutoff any overcurrent or short circuit that happened in the circuit.

This is another protective device used in most electronics circuit. car air conditioning repair chesterfieldIt has to be replaced once it is blown.car air conditioning repair swanseaIn order for the handheld remote control to send the settings to the controller at the air conditioner unit, there is at least an infra-red receiver printed circuit board that receives the signals from the handset. installing ac unit in casement windowThis receiver is usually located in front of the indoor unit and can be identified by a specially made sticker that allow infra-red frequency to pass through.Also known as handset, this is where you can control the air conditioner settings remotely by pointing your handset towards the air conditioning unit.

Temperature, timer, operating mode, energy saving function, air swing direction, fan speed, ionizer and sleep mode are some of the functions that are usually available depending on the manufacturer of the unit.Split Airconditioner Control Troubleshooting GuideHere is a list of split airconditioner control troubleshooting guide that you can use if you need to troubleshoot your split air conditioner unit. When troubleshooting, make sure mains power is disconnected before proceeding to check the printed circuit board to prevent electric shock. Back To Split Airconditioner Control Troubleshooting Home PageProblem: Chengdu in late autumn was delivering an ice-bath of still air as a group of friends sat in a room that was even colder than outside. Prognosis: the air-conditioner was set to COOL. Upon closer inspection, no one in the room could read the Chinese buttons on the AC remote, which further confused them on the thermostat readings. If you have any worry that this might happen to you, the following information will be of use to you.

note: if you’re using Firefox, install this plugin and you’ll be able to mouse over Chinese characters and see their English translation and pinyin romanization: Air Conditioner Remote Vocabulary A note on how thermostats work: you press the up or down button on your remote to choose the desired temperature. If your air conditioner is set to heat mode, it will continue blowing hot air at the wind speed you chose until the room reaches your goal temperature. We found 23 degrees Celsius to be perfectly comfortable for our small room, so we hit up on the remote until the number on the screen read 23. But then the number jumped back down to read 10, telling us what temperature the room currently was. Minutes later it will read 11 and then 12. After the display climbs on past 20 through 21, 22 and finally 23, get ready – the thermostat automatically turns the machine off, waiting for a reading below 23 degrees. With the machine off, heat begins escaping from the room and the room cools down again.

Magically, the thermostat in the AC machine detects this and automatically resumes operation. The process repeats to keep us at a perfect 23 degrees. I can’t count the number of times I’ve seen somebody say, “Why is it still cold in here?” and then turn their AC all the way up as high as it can go (up to 30 degrees). This doesn’t make the machine work harder. You’ll have to wait for the AC to do it’s job or turn up the wind speed. Equally inefficient is turning the machine off when the room is too hot because no one ever remembers to turn it back on until the room is too cold again. In this case the best option is to examine the number on the units display, telling you what temperature the too-hot-room currently is, and then set the thermostat for one degree lower. The machine turns itself off, and you can go about your TV watching or conversation as it automatically adjusts to keep you comfortable. You may notice that your Chinese friends become critical when you shed jackets and sweaters indoors as the temperature rises, citing that because the outside temperature is low you’ll get sick even if your immediate room is warm.