The following will introduce some methods and steps to use the mechanical thermostat of central air conditioning.
1.ON/off: Turn the toggle switch to the ON positiON, and the thermostat will be turned on; Turn the switch to the off position and the thermostat will turn off.
2. Working mode setting: turn the toggle switch to the cooling position and set the thermostat to the cooling mode; Turn the toggle switch to the HEAF position and set the thermostat to the heating mode.
3. Temperature setting: mechanical thermostat, use the knob to set the temperature, just aim the red dot at the temperature data indicated on the panel.
4. Wind speed setting: Turn the switch to the low position; The thermostat is set to low wind speed; Turn the switch to WED position and set the thermostat to medium wind speed; Turn the switch to the high position and set the thermostat to the high wind speed.
1: thermostat switch;
2: mode switching;
3: Time adjustment switch;
4: Ventilation size adjustment switch;
5: Temperature rise switch;
6: Temperature drop switch.
The thermostat of central air conditioner is divided into mechanical type and liquid crystal type:
Mechanical coil thermostat is used in commercial, industrial and civil buildings. The fan coil unit and water valve at the end of the central air conditioner can be controlled for heating and cooling. So as to keep the ambient temperature of the controlled place within the set temperature range. The dial pointer for temperature setting should be set at the required constant temperature position.
The functions of toggle switch are: power switch; Operation mode switch, fan speed switch. Controllable equipment: three-speed fan coil wind speed, three-wire electric valve, two-wire electric valve, electromagnetic valve, on-off air valve or three-wire air valve.
How to replace the air conditioner thermostat
1. If it is a variable frequency air conditioner, the temperature sensor will be changed incorrectly, which will have a greater impact. Therefore, in air conditioning maintenance, it is necessary to strictly select and replace the temperature sensor parameters of the manufacturer to avoid various soft faults of air conditioning units.
2. If you hang up, a black card will be stuck on the right side of the evaporator.
Pack in plastic
The component is a room temperature sensor. You can replace it by finding the plug of the inner board along the connecting line and taking it out.
Extended data:
The resistance of the temperature controller decreases with the increase of temperature and increases with the decrease of temperature. The resistance at 25℃ is a nominal value. The common faults of NTC include large resistance, open circuit, damp mildew, short circuit, poor contact between plug and seat or leakage, which causes abnormal voltage of CPU detection terminal of air conditioner and air conditioner fault.
There are three NTCs commonly used in air conditioning: indoor ambient temperature NTC, indoor coil NTC and outdoor coil NTC. Advanced air conditioners also use external ambient temperature NTC, compressor suction and exhaust NTC. NTC has two main uses in the circuit, as shown in figure 1. Temperature changes make the resistance of NTC change, so does the voltage at the CPU. The CPU determines the working state of the air conditioner according to the voltage change.
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What are the common faults of air conditioner thermostat? How to solve
The air conditioner thermostat is indispensable in many devices and plays a very key role. With more and more businesses, users and manufacturers demanding such devices, their information has also attracted the attention of different groups. In the process of using this kind of equipment, due to different external factors, various failures may occur. Let's take a brief look at the common faults of air conditioner thermostat.
Fault 1 of air conditioner thermostat: there is no display after the equipment is powered on.
Solution: 1 First of all, check whether the terminal of the equipment has been connected to the zero fire line to ensure that the zero fire line power supply can work normally. ? 2. Then start to check whether the cable between the LCD motherboard and the device driving power supply is loose, and relevant fastening measures need to be taken. 3. Pay attention to whether the thermostat switch has been turned on and whether it meets the specified standards. 4. When wiring the air conditioner thermostat, it is necessary to check the related voltage and current of the wiring power supply in advance.
Fault 2 of air conditioner thermostat: the wind speed displayed by the thermostat is different from the actual wind speed.
Solution: You can check whether the terminal of the air conditioner thermostat is connected incorrectly. If so, you need to reconnect them in the correct order and method.
Fault 3 of air conditioner thermostat: the equipment display is normal, but the control is wrong.
Solution: 1 First of all, you need to check whether the cable of the equipment is connected and the contact is good. Then you need to check whether the cable is connected correctly.
Fault 4 of air conditioner thermostat: the equipment has deviation in temperature detection.
Solution: 1 First, we need to use the temperature calibration data before the equipment, and then measure and compare it again. 2. Check whether the sensor configured by the equipment is faulty. 3. See if the installation location does not meet the specified standards and is not suitable for the detection of relevant temperatures. It is suggested to improve the installation environment.
After the arrival of 2 1 century, almost every household has installed air conditioners and other household appliances. Whether it is a household air conditioner or a commercial air conditioner, it is more convenient for everyone to master the temperature adjustment by installing such a thermostat. You should know that the air conditioner thermostat has become one of the devices used by domestic users and commercial users. The above four common faults are easy to encounter in daily use. I hope that through our brief introduction, all friends can find out the reason and make timely and effective treatment when they encounter such fault problems.
Working principle of air conditioning switch controller principle of air conditioning thermostat
Now all kinds of shopping malls and public places have installed air conditioners, and the air conditioner switch controller is the controller used to control the air conditioner. This controller can control the air conditioning mode, change whether the air conditioner blows hot air or cold air, and adjust the air conditioning temperature, which is very convenient for people to control the air conditioner. So how does the air conditioner switch controller control the air conditioner? The working principle of air conditioning switch controller is introduced in detail by Bian Xiao.
Working principle of air conditioning controller
The temperature control is based on the "upper limit temperature" and? If the upper limit temperature is 20℃ and the lower limit temperature is 18℃, when the temperature sensed by the temperature control probe is higher than 20℃, refrigeration will start until the temperature is lower than 18℃, and it will stop, and the temperature will be controlled between 18℃ and 20℃.
Start-up delay protection of air conditioner remote controller compressor
There is a "compressor stop timer" in the controller, which starts counting when the compressor stops. Please check the timer before starting the compressor next time. If it is three minutes, start the compressor immediately. If it is less than three minutes, wait three minutes before starting. This can ensure that the restart interval after shutdown is more than three minutes, and avoid frequent startup to damage the compressor. ? In addition, the controller will not start the compressor for three minutes after power-on, so that the compressor can be protected in the case of sudden power failure and power-on.
Principle of air conditioning thermostat
The thermostat is an electrical switch device to control the temperature of an air-conditioned room. The indoor temperature range of air conditioner controlled by thermostat is generally 18℃-28℃. The common window air conditioner thermostat is based on the principle of pressure action to push the contact on and off. Its structure consists of bellows, temperature sensor, eccentric wheel and microswitch, forming a sealed induction system and a system for transmitting signal power.
Control methods are generally divided into two types;
One is controlled by the temperature change of the cooled object, mostly using steam pressure thermostat, and the other is controlled by the temperature difference change of the cooled object, mostly using electronic thermostat. Thermostats are divided into mechanical types: steam pressure thermostat, liquid expansion thermostat, gas adsorption thermostat and metal expansion thermostat. Among them, the steam pressure thermostat can be divided into inflatable type, liquid-gas mixed type and liquid-filled type. This thermostat is the main mechanical type of household air conditioner. Electronic type is divided into: resistance thermostat and thermocouple thermostat.
Through the above introduction, I believe everyone has a certain understanding of the air conditioning switch controller and its working principle. The switch controller of air conditioner can not only control the temperature and switch of air conditioner, but also control various modes of air conditioner, which is very convenient. Bian Xiao here recommends that you choose some big brands of air-conditioning switch controllers, because big brands of air-conditioning switch controllers are relatively reliable in quality and after-sales service. I hope that through Bian Xiao's introduction, you can understand the working principle of air conditioning switch controller.