How to use a multimeter to check whether the refrigerator is leaking or short circuited

Get an electrician to come back and have a look.

1. You can measure the power failure, first turn off the electrical appliances used, and use a multimeter.

RX a 0K file meter pen reception fire wire another table pen connection, should show poor resistance, if not, it is leakage. 2. You can also measure boldly with electricity, use the 20 volt AC voltage level of the multimeter to measure the metal shell of the electrical appliance suspected of leakage, and connect the meter pen to the shell and another table pen, or connect the water faucet.

The pointer shows that the voltage is higher than 30-50 volts and the AC 50 volt power supply is confirmed, higher than 30 volts is leakage, and lower than 30 volts is zero. 3. In addition, indirect measurement can also be used. Relevant precautions: 1. Use multimeter ohms.

When the 200m gear is stopped, be careful not to touch the metal part of the pen with your hand when measuring, as this will make the reading inaccurate. 2. When measuring each electrical equipment, pay attention to discharging first to prevent the capacitive current in the electrical equipment from hurting people. 3. In addition, it should be noted that this method is a safer way to find fault points in a state of no electricity, and this method is also suitable for power users and plant leakage and blind bending of the search, but when searching, it is not only necessary to disconnect the power supply line, but also to disconnect the zero line with stuffiness to avoid electric shock accidents.

4. Once the refrigerator leakage is detected, it must be dealt with, and it is necessary to contact professional personnel to detect and check the leakage for maintenance.

The first thing to do is to be able to use a multimeter. 1. Figure out the ins and outs of the line to be checked, and disconnect the open circuit air switch of the power supply to ensure personal safety. 2. Check the electricity, use the AC voltage of the multimeter to pull it to the 700V level, and check whether the lower end of the output is cut off.

3. Disconnect the load of the circuit under test (such as fluorescent lamp) and pull the multimeter to the gear with a beep, and the resistance of the two working wire heads should tend to infinity, such as the short-term multimeter of the line will make a sound, 4, there is a PE grounding wire to pay attention to check it, and the working zero line and PE can not have a buzzer at this time.

A short circuit refers to a phase wire to a phase wire, and the phase wire to the neutral wire is not directly connected by any load. To ground generally refers to a short circuit between the phase and the ground. Voltage, what is voltage?

The potential difference between two points is the voltage. Before measuring, cut off the power supply and load, that is, pull the gate and then unplug the electrical appliance, and directly measure the phase wire and the phase wire, and the resistance between the phase wire and the neutral wire or the ground wire with the electrical barrier, the normal is infinity, and the table will show a 1. As for the relationship between the neutral wire and the ground wire, it is not clear in a few words, that is, the difference between the three-phase four-wire system and the three-phase five-wire system.

To check whether the line is short-circuited or grounded, you can tell what kind of power supply system it is, and the method is slightly different. To test a short circuit or ground, you have to pull off the power supply to disconnect the load, and some leakage switches have a straight zero line, and you have to remove the zero wire to measure, because the zero wire and the ground wire are separated from one line. The digital multimeter uses the diode gear, and the pointer multimeter uses the R1 gear.

The table pen is connected to the live wire, the neutral wire, and the ground wire respectively.

The resistance value measured by the fire zero wire is very small for a short circuit, the resistance value measured by the fire ground wire is very small for grounding, and the resistance value measured by the zero ground wire is very small for the zero line grounding. If the diode file and R1 file cannot be measured, use the 2m ohm and 10m ohm ohm file to measure. If the line is a little longer, it is recommended to use a shake meter.

When distinguishing between circuit leakage and grounding, please select the range of the multimeter. Under normal circumstances, when measuring the leakage of the line, the multimeter is selected 10k gear, when the line resistance value is greater than or equal to the megaohm, the line grounding condition is good, otherwise, the line leakage, leakage protection action, indicating the leakage state.

If you choose a megohmmeter, shake the megohmmeter at a constant speed to make it 120 revolutions, and after the stable reading, it is the line leakage value. When measuring the short circuit, the multimeter x1 gear is selected, when the multimeter shows 0 or the resistance value is small, it means that there is a short circuit in the line.

In the case of a power outage, it is confirmed that the line is not energized, and that all loads on the line to be inspected have been removed (or disconnected). Then use the multimeter resistance file (preferably below 100 ohms) to test the resistance value of the phase wire and the neutral line, and then measure the resistance value of the phase wire and the ground wire, and compare the two to get the resistance value of the small resistance, that is, the phase line to the ground or the phase line to zero short circuit.

If the neutral wire of the motor needs to be measured for short circuit, the resistance value is 10% different from the resistance value between the phases, then the resistance value is small, there is an inter-turn short circuit, the winding needs to be removed, and the neutral wire of the new winding needs to be re-embedded, and the phase is measured with the shell respectively, and the resistance value is normal for 380V motors greater than 500 thousand ohms to 2 megaohms, less than half a megaohm to 1 for moisture, which needs to be used after drying, and close to 0 ohms, it needs to be re-embedded in the new winding!

Resistance method with the multimeter pen, both pen are connected to the input voltage of the circuit, and then one of the pen A does not move, the other B pen moves along the various contact points of the pen B wire, there is no open circuit, the resistance in the multimeter is displayed with a numerical value, if somewhere (n+1) the resistance is displayed as (m), then, here is the open circuit point, and the broken point is in the (n, n+1) section of the line.

Power off first, hit the ohmic file, both ends of the contact line of the two meter pens, check whether the meter needle has a resistance value, the resistance value is zero to indicate the path, the resistance value is infinity means a short circuit, and then the meter is hit to the voltage level, measure the positive and negative poles of the power supply, whether there is electricity, if there is a normal explanation, if there is no indication of the open circuit. The multimeter hits the voltage level, one meter pen is connected to another power supply, and the other is connected to the big iron, if there is a value, it means leakage.

First of all, turn off all the electrical appliances in the house, and remove all the plugs.

If the live wire and the protection wire are short-circuited, the total power supply needs to be disconnected, and the multimeter is used to detect the situation between the live wire and the ground wire of each socket. After the operation, you can turn on the main switch to see if it will trip, if it also trips, it means that the main line is short-circuited.

When a short-circuit fault occurs in the line, you can use the insulation resistance tester to test and detect, and then find the short-circuit point and short-circuit equipment along the line. Once the fault point is found, it can be dealt with accordingly.

Voltage method: that is, all the places where there is an open circuit in the circuit are considered to be forced to close (under the condition of energizing), and then use the pen of the multimeter, both of which are connected to the input voltage of the circuit, and then one of the pen does not move, and a pen moves along the various contact points of one of the wires, and the voltage is displayed as the input voltage U if there is no open circuit, if the voltage is displayed as 0 somewhere (N+1), then it is the circuit break point, and the circuit break point is in the (N, N+1) section of the line.

This method is actually very simple, that is, the two meter pens of the multimeter are in contact with the input voltage contact, and then one meter pen does not move, and one meter pen moves along the line in turn. If there is no voltage in the multimeter under the power-on condition, this is the break point. When the resistance of the multimeter is infinity when there is no power, then this is the breakpoint.

Both methods are fine. It is better to use the resistance method for safe flowers.

Summary. How to test refrigerator leakage with a multimeter 1Bulb inspection method:

Connect the two wires of the 36V bulb to the refrigerator shell (unpainted) and the other to the ground. If the light bulb is on, it means that the refrigerator is leaking. 2.

Voltage check method: use the AC voltage block of the multimeter (above 250V), one meter pen is connected to the refrigerator shell, and the other meter pen is connected to the ground, if the voltage exceeds 36V or more, it means that the refrigerator leakage can not be used. 3.

Resistance check method: use a multimeter r*100 gear, a meter pen connected to the wire, and the other meter pen connected to the casing, if part or all of the conduction is found, it proves that the leakage is proved.

How to test refrigerator leakage with a multimeter 1Bulb inspection method: slide the orange of the 36V bulb with two wires, one to the refrigerator shell (no paint) and the other to the ground.

If the light bulb is on, it means that the refrigerator is leaking. 2.Voltage check method:

Use the AC voltage block of the multimeter (above 250V), one meter pen is connected to the refrigerator shell, and the other meter pen is connected to the ground, if the voltage exceeds 36V or more, it means that the refrigerator leakage cannot be used. 3.Resistance check method:

Use Liang Wu to roll the multimeter r*100 gear, a watch rubber pen to connect the wire, the other meter pen to connect the case, if part or all of the conduction is found, it proves leakage.

I'm sorry I don't understand, but can you elaborate on that?

If it is a one-way motor, directly use the ohmic file to measure the two incoming wires of the Li Liang motor, if the resistance is infinite, it will burn out. If it is a three-argument shoot Hu Xiang motor, use the carrying block ohmic gear.

Summary. Hello dear, it's a pleasure to serve you. Use a digital multimeter to detect an open circuit in the refrigerator. 1.Open circuit means that the circuit is disconnected, and the resistance value of the circuit is infinite, so it can be tested in this way.

Hello dear, very high celery is at your service. Use a digital multimeter to detect the phenomenon of open circuit combustion in the refrigerator. 1.Open circuit means that the circuit is disconnected, and the resistance value of the circuit skin is infinite, so it can be tested in this way.

2.First of all, when measuring the open circuit fault, always make sure to disconnect the power supply and remember not to operate with electricity.

3.Test the power supply of the refrigerator first, open the refrigerator leakage, adjust the multimeter to the buzzer file, touch the two poles of the power supply inlet with the pen of the multimeter, and there is a friend rush beep to return to the sleepy sound, or there is a digital display to represent that there is no open circuit, otherwise it represents a short circuit.

4.Similarly, the compressor of the refrigerator can be measured, and the compressor test method is the same as the third step, with a beep or a number to represent the pathway.

Is it correct to use the beeping file to measure that there is a beep sound or a digital display that means that the refrigerator is normal?

It can't mean that the refrigerator is 100% normal, it can only prove that the refrigerator is not broken.

Good. Uh-huh.

It's the same with split air conditioners, right? If there is a digital display or sound at the inlet of the buzzer file test power supply, it shouldn't be an open circuit, right?

Yes, all air conditioners can be used this way.

However, you have to pay attention to the air conditioner if there is a short circuit. It will also cause a beep.

Well, I tested a few air conditioners with only digital displays. No beep.

That can prove 100 times that it's not an open state. It can also be proven that it is not completely short-circuited.

The refrigerator has a digital display and a beeping sound.

That only means that the resistance is lower. Resistors below 70 ohms will beep.

Meaning the fridge should be good?

I can't prove it. It is impossible to prove that the refrigerator is good or bad just by turning the circuit on and off. Because the quality of the refrigerator is also related to the Chongdan potato chips on it. Is it too late to experience the mechanical parts related to the loose system?

I can't prove it. It is impossible to prove that the refrigerator is good or bad just by turning the circuit on and off. Because of the muffle, the refrigerator is leaked, and the quality of the refrigerator is related to the macro bureau of the chip above. Fortunately, the mechanical parts are related.

It is also related to mechanical parts.

1. You can use the bulb inspection method to detect the leakage of the refrigerator, and connect the two wires of the 36V bulb to the refrigerator shell (no paint) and the other to the ground, if the bulb is on, it means that the refrigerator has leakage. 2. You can also use the voltage check method and use a multimeter.

AC voltage block (above 250V), a meter pen is connected to the refrigerator shell, and the other meter pen is connected to the ground, if the voltage exceeds 36V or more, then it means that the refrigerator has leakage. 3. You can also use the resistance check method, use the multimeter R*100 gear, connect a meter pen to the wire, and glide a meter pen to connect the chassis, if it is found that part or all of it is on, it proves that there is leakage.

1. Check whether the power cord of the refrigerator is damaged, if the power cord is damaged, then you need to replace the new power cord to solve the problem of leakage of the refrigerator. 2. The power cord problem has been ruled out, and it is necessary to check whether it is due to the thermostat.

If there is a leakage, if it is caused by the leakage of the thermostat, first of all, it is necessary to ensure that the surroundings of the thermostat are dry, and there is a leakage after wiping it clean, then it is necessary to replace the thermostat with a new one.

3. If the above two problems are ruled out, then you need to check whether it is a refrigerator compressor.

If there is such a problem, then you need to contact a professional maintenance personnel to repair it, or directly replace the new compressor motor to solve the problem of refrigerator leakage.

One of the most commonly used tools for people involved in multimeter electronic circuits, it is indispensable when detecting electronic circuits, and with a multimeter, faults can be quickly located. Don't look at the small size of the multimeter, but its powerful function, can measure resistance, capacitance, diode, transistor, DC voltage, AC voltage, current, etc., finding short circuit, open circuit, leakage is the most basic function of the multimeter. Using a multimeter to measure whether there is a short circuit in a circuit is actually very simple.

But there is a premise, everyone must pay attention to the operation of power-off. Otherwise, not only is it dangerous, but your multimeter may burn out.

<> multimeter to judge whether the live wire and the neutral line are short-circuited, we have to use the beep file of the multimeter, in the case of power failure, first of all, we put the red watch pen on the live wire, the black watch pen on the zero line, if there is a beep to prove that it is through, if the live wire zero line is through, it proves that the wire is short-circuited, the multimeter does not respond, the proof is not passable, if the live wire zero line is not through, it proves that the wire is not short-circuited and short-circuited, when the current does not pass through the electrical equipment, the current flows directly from the live wire to the neutral line, or in other words, directly from the positive electrode to the negative poleTo put it simply, the two return routes are directly connected, and we say that the line is short-circuited, which is the essence of short-circuit faults.

Commonly used instruments for electricians include multimeters, clamp ammeters, megohmmeters, grounding resistance meters, bridges, etc., among which multimeters are the most widely used in the daily maintenance of electricians. There are many functions of a multimeter, such as measuring current, resistance, voltage, diode, transistor, capacitor, inductance, temperature, and so on. 3. In the cycle path, electricity is diverted halfway, such as rice cookers, washing machines, and other electrical appliances with ground wires, due to moisture or other faults, the ground wire and the live wire or neutral wire are measured with different degrees of resistance data.

Turn off the power when measuring, use a multimeter 10k file, the geodesic wire at one end of the meter pen, and the zero line or live wire at the other end, and the meter head has a reading that is leakage. If it is measured with a megohmmeter, it is even more obvious that it is leakage.