The hotel has installed air conditioning and heating. How to unlock it on the remote control?

You can use the powerful control panel or remote control of the air conditioner to change the operation mode of the air conditioner. If you don't have a remote control at hand, it is not recommended to change the operation mode of the air conditioner.

Summarizes the common fault analysis and troubleshooting methods of air conditioning. I hope beginners will try not to take detours and be confused by some theoretical books. Actually, they haven't practiced at all They can list a lot of reasons for a problem, but they don't want it. 90% is changed by those things. Please correct me.

1, air conditioning does not turn on, there are two main types, the first is that there is no response when power is on, transformers, fuses, rectifier bridges, etc. These should be pediatric things, and important measuring voltages such as 5V are normal. Most of this problem can be solved by replacing the crystal oscillator next to the CPU. Another is that there is a buzzer when plugging in, which can be done manually without turning on the remote control. Basically, the receiver head is broken, so it can't be searched online. It is easy to find the anchor of the receiving plate. It is easy to find the negative pole of the capacitor or the wide line of the circuit board, and it is also easy to find the other two feet of the anchor.

2. The air conditioner automatically switches on and off from time to time, and some make phone calls in the middle of the night. Cleaning the receiving plate, changing the receiving head or removing the automatic transfer switch can basically kill it.

3. The external machine automatically stops for several minutes or tens of minutes after starting, or the external machine does not start the indoor pipe temperature sensor.

4, boot display all kinds of fault codes, hehehe, I think you can't remember the code of air conditioner, I never remember fault codes, I'll teach you a trick, 1 test the internal and external machine connection lines. 2 measuring sensor. 3 Measure the power supply voltage.

4. Rectify to 380V, check whether it is out of phase, and observe whether the current and indoor and outdoor machines are too dirty. I believe that ordinary problems can be solved.

5. The outdoor unit cannot be started, or only one fan is running outdoors. For beginners, capacitance is generally not good, and other problems will be analyzed in detail.

6. Thermal protection after the compressor starts for a period of time. I believe this is the biggest headache for all air conditioners. This problem can't be solved normally by conventional methods. It is best to replace the compressor when the heat dissipation and voltage of the system are normal. Don't waste time. Time is money. Don't listen to a lot of methods mentioned in some magazines. I have used them all, and the success rate is very low. This is unnecessary. Some people change capillaries and do nothing. Moreover, this is a matter of professional ethics.

7. There is also a difference between displaying fault codes when the power supply is plugged in and displaying fault codes after operation. Plug-in display is generally a problem of power supply or signal line and motherboard. Running the monitor for a while is usually a sensor problem.