The air conditioner is not refrigerated, the outside unit has an intermittent humming sound, and the

In this case, the intermittent humming sound of the external unit indicates that the compressor of the external unit is stuck. That is, the coil of the compressor is stuck and cannot operate, and the strong current generated will then be heard. There are two reasons for this failure.

The first case is that the compressor capacitor is broken. The second scenario is that the compressor is stuck. Which of these two is broken, you need a professional maintenance master to deal with it. ”

Hello: 1, the intermittent humming of the outdoor unit of the air conditioner is [The compressor is intermittently energized(No start).Performance

2. Compressor [Start the capacitor] Damaged,The current is very high, making [Overheat protector] tripped, cooled down and reset, and repeatedly appeared [Buzz].

Hire a qualified professional maintenance workerCheck and replace the capacitors, high-quality capacitorsIt's only a few dollars

If there is no refrigeration and the outside unit has an intermittent humming sound, the compressor capacitance is bad or the compressor is stuck.

In this case, it may be that the compressor starting capacitor has failed both.

Check if the capacitor in the air conditioner is broken? If so, a few dozen yuan for one can be changed.

1. The compressor has no refrigerant, add refrigerant.

3. The compressor is damaged, replace the compressor.

4. The thermostat is broken, replace the thermostat.

5. The temperature sensor is broken, replace the sensor.

6. The sensor position is not in place, and the sensor is re-fixed.

Temperature sensor failure accounts for a relatively large proportion of air conditioning failures, to accurately judge the first thing to understand its function, the air conditioning control part is equipped with a total of three temperature sensors:

1. Room temperature sensor: mainly detect the indoor temperature, when the indoor temperature reaches the set requirements, control the operation of the internal and external machines, stop the external machine during refrigeration, continue to run the internal machine, and stop after the internal machine blows the residual heat during heating.

2. Indoor tube temperature sensor: It mainly detects the coil temperature of the indoor evaporator, and plays the role of anti-cold wind, anti-overheating protection and automatic temperature control during heating. If the temperature of the coil unit does not reach 25 degrees Celsius, the indoor fan will not operate, and the internal fan will work with a breeze when it reaches more than 25 degrees Celsius and below 38 degrees Celsius, and the set wind speed will work when the temperature reaches more than 38 degrees Celsius; When the temperature of the indoor coil reaches 57 degrees Celsius for 10s, stop the operation of the outdoor fan, when the temperature exceeds 62 degrees Celsius for 10s, the compressor also stops running, and only when the temperature drops to 52 degrees Celsius, the outdoor unit is put into operation, so when the coil resistance is larger than the normal value, the indoor unit may not be able to start or run at a low wind speed, when the coil resistance is small, the outdoor unit frequently stops the indoor unit to blow cool air.

When the temperature of the indoor coil is lower than -2 degrees Celsius for 2 consecutive minutes, the outdoor unit will stop running, and when the temperature of the indoor pipe rises to 7 degrees Celsius or the compressor stops working for more than 6 minutes, the outdoor unit will continue to run, so when the coil resistance value is large, the outdoor unit may stop running, and the indoor unit will blow natural wind and there will be no refrigeration failure.

3. Outdoor defrosting temperature sensor: mainly detect the temperature of the outdoor condenser coil, when the temperature of the outdoor coil is lower than -6 degrees Celsius for 2 minutes, the internal unit turns to the defrosting state, when the resistance of the outdoor coil sensor is large, the indoor unit can not work normally.

It's a problem with the fan of the external unit, the fan doesn't rotate, the compressor overheats and automatically protects it, you can change the fan capacitor to try, if not, the fan motor is broken.

Just start is the temperature of the compressor is not high, normal operation will have cold air out, there will be a buzzing sound, about a minute, the compressor has no fan to dissipate heat, the compressor overheating protection automatically stops, there is no cold air.

The reasons why the outside unit of the air conditioner does not start may be:

1. Causes of voltage:

If the voltage is not enough, if the air conditioner cannot be turned on, it is necessary to check whether the power supply of the external unit is electric or whether the voltage reaches the rated voltage. If it is not the cause of low voltage, please check whether the indoor and outdoor units are connected correctly, whether the wires are aging, and whether the motherboard of the indoor unit is wired correctly, otherwise replace the motherboard of the internal unit. If the electric buzzer does not sound, check the transformer.

2. If the external unit has a voltage of 220V, check whether the red indicator light on the motherboard of the external unit is on, if the indicator light is not on, check whether the external unit connection line is loose, whether there is a direct voltage of about 300V between the power module P+ and N-, if not, check the reactor, rectifier bridge and wiring. If there is, but the indicator light of the motherboard of the external unit is not lit, first check whether the signal connection cables from the power module to the motherboard (a total of 10) are loose or poorly contacted, and then replace the power module, when replacing the module, the heat dissipation paste must be evenly coated between the radiator and the module.

3. If the air conditioner is turned on for about 10 minutes and cannot be started, please check whether the indoor pipe temperature sensor is open; If the machine is started again after starting, and the external fan is not started, check whether the indoor and outdoor temperature sensing heads are short-circuited.

Summary. Hello Kiss Hello is happy to answer for you, Kiss you can follow the steps you have already done: Hello, 1

The set screw between the motor of the air conditioner fan and the fan blade is loose. 2.The coil of the fan motor is damaged, causing the fan of the air conditioner to not rotate and ring.

3.The capacitance of the air conditioner fan is damaged, and the fan of the air conditioner does not turn and rings. 4.

The low power supply voltage causes the fan of the air conditioner to not turn and the machine sounds. One of the reasons why the fan of the air conditioner does not rotate is that the main control switch is in poor contact, maintenance method: use a multimeter to measure the contact resistance of the main control switch, when the resistance is too large or zero, it should be repaired or replaced.

The second reason is that the fan motor of the air conditioner is damaged, and the solution: only need to replace the fan motor. The third reason is that the capacitor of the starting fan is damaged, and the solution:

It is necessary to inspect the capacitor, and then a professional maintenance personnel will repair or replace the capacitor of the same specification. I hope mine can help you. Have a great day

After turning on the air conditioner, the outside unit buzzes and the fan does not turn. What is the reason?

Hello Kiss Hello is happy to answer for you, Kiss you can follow the steps you have already done: Hello, 1The set screw between the motor of the air conditioner fan and the fan blade is loose.

2.The coil of the fan motor is damaged, causing the fan of the air conditioner to not rotate and ring. 3.

The capacitance of the air conditioner fan is damaged, and the fan of the air conditioner does not turn and rings. 4.The low power supply voltage causes the fan of the air conditioner to not turn and the machine sounds.

One of the reasons why the fan of the air conditioner does not rotate is that the main control switch is in poor contact, maintenance method: use a multimeter to measure the contact resistance of the main control switch, when the resistance is too large or zero, it should be repaired or replaced. The second reason is that the fan motor of the air conditioner is damaged, and the solution:

Just replace the fan motor. The third reason is that the capacitor of the starting fan is damaged, and the solution is that the capacitor needs to be checked, and then the professional maintenance personnel will repair or replace the capacitor of the same specification.

I hope mine can help you. Have a great day

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1.Poor contact of the main control switch The reason why the fan of the air conditioner does not rotate may be due to the poor contact of the main control switch. At this time, the resistance of the main control switch contact can be measured with a multimeter, and if the measured resistance is too large or zero, it should be repaired or replaced immediately.

2.The second reason why the fan of the air conditioner does not rotate is that the coil is damaged. Again, the solution is similar to the one-cause solution.

That is, use a multimeter to measure the contact resistance of the main control switch, and when the resistance is too large or zero, it should be directly replaced. 3.Loose set screw The third reason why the fan of the air conditioner does not rotate is that the set screw between the motor of the fan and the fan blade is loose.

At this time, the maintenance method is to tighten the set screw. 4.Open or short circuit in capacitor One reason why the fan of an air conditioner outside unit does not rotate may be an open or short circuit in the fan capacitor.

The solution in this case is to check the capacitor and replace it with a capacitor of the same size.

Summary. Hello, 1.

The set screw between the motor of the air conditioner fan and the fan blade is loose.

The coil of the fan motor is damaged, causing the fan of the air conditioner to not rotate and ring.

The capacitance of the air conditioner fan is damaged, and the fan of the air conditioner does not turn and rings.

The low power supply voltage causes the fan of the air conditioner to not turn and the machine sounds.

The air conditioner is buzzing all the time, and the fan doesn't turn.

Hello, 1.The set screw between the motor of the air conditioner fan and the fan blade is loose.

The coil of the fan motor is damaged, causing the fan of the air conditioner to not rotate and ring.

The capacitance of the air conditioner fan is damaged, and the fan of the air conditioner does not turn and rings.

The low power supply voltage causes the fan of the air conditioner to not turn and the machine sounds.

One of the reasons why the fan of the air conditioner does not rotate is that the main control switch is in poor contact, maintenance method: use a multimeter to measure the contact resistance of the main control switch, when the resistance is too large or zero, it should be repaired or replaced. The second reason is that the fan motor of the air conditioner is damaged, and the solution:

Just replace the fan motor. The third reason is that the capacitor of the starting fan is damaged, and the solution is that the capacitor needs to be checked, and then the professional maintenance personnel will repair or replace the capacitor of the same specification.

The fourth reason why the fan of the air conditioner does not rotate is that the fan motor coil is damaged, and the contact resistance of the main control switch is measured with a multimeter. The fifth reason is that the set screw between the motor of the fan and the fan blade is loose, and the solution is to re-tighten the set screw. The sixth reason is that the compressor cannot operate normally due to the low power supply voltage, and a voltage regulator needs to be configured.

The seventh reason is that the compressor is damaged, and the solution is to replace the compressor.

Cause. 1. Poor contact of the main control switch. Maintenance method: Use a multimeter to measure the contact resistance of the main control switch, when the resistance is too large or zero, it should be repaired or replaced. Cause.

Second, the fan motor coil is damaged. Maintenance method: Use a multimeter to measure the contact resistance of the main control switch, when the resistance is too large or zero, it should be repaired or replaced. Cause.

3. The set screw between the motor of the fan and the fan blade is loose. Maintenance method: Tighten the set screws. Cause.

4. The fan capacitor is open or short-circuited. Repair method: Check the capacitor and replace it with a capacitor of the same specification.

Dear, hello, there may be the following reasons why the outside unit of the air conditioner does not turn and the internal unit buzzes:1Power failure:

If the external unit fails to start, it may be due to a power failure, such as a loose power plug or a broken power cord. 2.Button setting issues:

If the air conditioner switch button is not set correctly, or the remote control of the air conditioner is set incorrectly, it may cause the external unit to fail to start or make a buzzing sound. 3.Internal Failures:

If there is a failure inside the external unit of the air conditioner, such as a damaged capacitor, a faulty compressor, etc., it may also cause the external unit to not rotate or make a humming sound. 4.Piping Issues:

If there is a problem with the pipeline of the external unit of the air conditioner, such as blocked condensation pipes, refrigerant leakage, etc., it may also cause the external unit to not rotate or make a humming sound. If you encounter the problem that the outside unit of the air conditioner does not rotate and the internal unit is buzzing, it is recommended that you stop using the air conditioner immediately and contact a professional air conditioner maintenance personnel for inspection and repair to avoid more serious failures.

Lack of refrigerant – aka freon.

There are many types of freon, the common ones are R22, R32, R134A, etc. Freon is generally a gas at room temperature and pressure, with a slight aromatic flavor. It is a transparent liquid under low temperature pressure.

It is miscible with halogenated hydrocarbons, monoalcohols or other organic solvents in any ratio, and it is also miscible with fluorinated refrigerants. Because Freon has strong chemical stability, thermal stability, low surface tension, easy vapor-liquid two-phase change, non-toxic, lipophilic, inexpensive, etc., it is widely used in refrigeration, foaming, solvents, sprays, cleaning of electronic components and other industries.

Whereas, the emission of freon into the atmosphere can cause a decrease in ozone levels, causing severe ultraviolet damage to life on Earth and a rise in the temperature of the lower stratosphere and troposphere. Therefore, people are working on methods and technologies to solve the problem of freon pollution, and the ways to solve the problem of environmental pollution mainly include restriction and ban, alternative development and harmlessness of freon.

There are several possibilities: 1. The compressor capacitance is bad (it can be measured with a multimeter) 2. The condenser is dirty and the heat dissipation is not good (this situation can generally be seen through the pressure gauge) 3. The compressor is bad (it can be measured with a multimeter) 4. The pipeline is blocked or F is added too much (this situation can generally be seen through the pressure gauge).