The air conditioner shows what the E3 is all about

E3 means compressor low pressure protection.

And the reasons and solutions:

1.Determine if the ambient temperature is too low.

2.To determine whether it is a control fault or a system fault, you can first short-circuit the LPP plug on the main control board and the neutral wire N on the motherboard. If the VTH is running normally, you can confirm that the main board or display board of the VTH is fine, and the fault is due to the connection wire, plug or low-voltage switch of the VH.

3.Connect the external connector and plug, adjust the multimeter to ohmic mode, connect one probe to the LPP protection wire unplugged from the motherboard, and the other probe to the neutral line N, if the resistance value is 0, the fault is on the low voltage switch, otherwise it is a line problem. The fourth step is to determine whether the system is leaking fluorine or blocked by the pressure gauge.

What should I do if the air conditioner shows dust?

The appearance of "full of dust" is mainly to remind the user to clean the filter. Many people don't pay attention to cleaning the filter, and they don't even know the consequences of not cleaning the filter for a long time: first of all, it may affect the operation and cooling effect of the air conditioner, resulting in a decrease in air volume and poor cooling effect, which in turn affects the service life of the air conditioner.

Secondly, the air inhaled when the air conditioner is working contains some harmful substances, such as dust, mites, viruses, etc. , some of which stick to the filter screen. If the filter is not cleaned for a long time, such bacteria and fungi can grow in the air conditioner, causing musty and odors.

1.First, turn off the power.

2.Disassemble the lower part of the cabinet; If you hang up, there are two hidden handles (grooves) on both sides of the indoor unit, and you can lift the panel slightly outward with both hands. In the case of cabinet units, there are two plastic decorative caps on the plastic fence of the air intake panel at the lower part of the machine.

Pull out the trim cap to reveal the retaining bolts, simply remove the retaining bolts.

3.Attention! It is said that the air intake filter is made of nano material and should be cleaned properly. It is better not to wash with water, but to brush along the side of the grain road with a soft brush.

4.Find the screw position or some of them fix the housing through a clamping position. After disassembling the shell, you can see the dust filter; Take it off, wash it with clean water, dry it, and put it back.

In addition to normal operation, some signs of air conditioners also have fault signs and reminder signs, and E3 is a reminder sign. The so-called reminder sign is to remind everyone that the current state of the air conditioner is not good, and everyone should pay attention to their own use behavior, or voltage, current and other problems, and be extra careful in this situation. The sign indicates that there is a problem inside the air conditioner, which has affected the normal use of the air conditioner, and we need to find after-sales personnel for repair in time.

1. If the E3 logo appears on the LCD screen of the air conditioner, it means that there is low-voltage protection, and the air conditioner has turned on the protection measures against freezing. We need to check the air conditioner, and there are many reasons for this. 2. For example, if the current temperature is set too low, generally speaking, if the setting is lower than 22 degrees, and the air volume is relatively small, some brands of air conditioners will have normal protection.

3. It may also be a manifestation of the lack of fluoride in the air conditioner, you can take a look at the air outlet of the air conditioner and its thin pipe, including whether the indoor exchanger has frost and ice problems. If it appears, it means that there is a lack of fluoride, and it is necessary to add freon in time. 4. It is also possible that the filter screen of the air conditioner is too dirty, and the dust is blocked, which will lead to low air volume, and there will also be a fault at this time, and the filter screen needs to be cleaned.

5. If you can't find a specific reason, you can also find after-sales service personnel to come to check and repair.

E3 means: Compressor Low Pressure Protection.

1. Determine whether the ambient temperature is too low.

2. To determine whether it is a control fault or a system failure, you can first short connect the LPP plug on the main control board and the neutral line N on the motherboard, if the indoor unit is running normally, you can determine that the main board or display board of the indoor unit is fine, and the fault appears on the indoor and outdoor unit connection wires, plug joints or low-voltage switches of the outdoor unit.

3. Connect the cable and plug of the external machine, adjust the multimeter to the ohmic block, connect one meter pen to the LPP protection wire unplugged on the motherboard, and connect the other meter pen to the zero line N, if the resistance value is 0, it means that the fault is on the low-voltage switch, otherwise it is a line problem.

4. Use the pressure gauge to determine whether the system is leaking fluorine or blocked.

Midea air conditioner failure**:

1. The fault display of e0 indicates that the EEPROM parameter is incorrect.

2. Fault E1 indoor and outdoor unit communication failure.

3. Fault E2 zero-crossing detection error.

4. E3 fan speed.

5. Fault E4 temperature fuse off protection.

6. Faulty E5 outdoor temperature sensor failure.

7. Faulty E6 indoor temperature sensor failure.

8. Fault P0 module protection.

9. Fault P1 voltage is too high or too low protection.

10. Temperature protection at the top of the faulty P2 compressor.

E3 indicates that there is a low voltage protection, and at this time the air conditioner has turned on the anti-freeze protection measures.

Determine if the ambient temperature is too low. If the set temperature and indoor and outdoor ambient temperature are too low (generally lower than 22 degrees), and the air volume is too low, the air conditioner will be protected normally (the temperature will be lifted after the temperature rises).

It may also be caused by the lack of fluoride in the air conditioner, at this time, you only need to see whether the air conditioning tube and the indoor heat exchanger are frosted, if frost, it means that the air conditioner is deficient in fluorine, at this time, you can find after-sales leak detection and fluoride, if there are conditions to measure the system pressure is the best.

Precautions for the use of air conditioners.

It should be noted that do not close the doors and windows when turning on the air conditioner, close the doors and windows after a period of air circulation, increase the fresh air rate when using the air conditioner, and maintain a certain amount of air flow and natural ventilation.

It should be noted that the air conditioner should be adjusted to about 26 to ensure that the temperature difference between indoor and outdoor is not too large, which can save energy and avoid colds, and the use of air conditioning should not be too long, generally open for 3 hours to close for a period of time, and open doors and windows for ventilation, long-term work and life in the air-conditioned room, should pay attention to increase outdoor activities, contact with sunlight, and breathe fresh air.

Avoid direct wind blowing. After turning on the air conditioner, you can turn the page fan of the air conditioner to the upward direction to avoid direct blowing of the air conditioner. Excessive cold wind blowing directly will cause colds, runny nose, cool air and other diseases.

The ** air conditioner that is not cleaned for a long time will carry a large number of bacteria when it is ventilated, which can easily cause the user's respiratory tract.

Unwell. The above content refers to People's Daily Online - The secret of using air conditioners correctly is here.

Encyclopedia - Air conditioning failure.

Gree E3 fault is: low-voltage protection, generally caused by lack of fluorine, as long as you check whether the low-pressure pressure is in the kilogram, if it is low, then you need to check for leakage and fluoride.

There is another situation, but it is relatively rare, that is, the low-pressure pressure switch is faulty or the line connected to this is broken, you can open the cover plate of the air conditioner unit, there is a copper pipe connected, the tail is bakelite plastic, there are two leads to measure (to confirm that there is no lack of fluorine) whether it is open if the circuit is open, then you can merge it up for emergency (but remember to replace it, otherwise there is a real lack of fluorine, but you have to burn the compressor), if the switch is not open, then check the leads, and it can generally be solved.

Cause of failure: system low-voltage protection. 1. Insufficient refrigerant (fluorine leakage in the system).

2. The expansion valve is half-blocked, and the solenoid valve is faulty. 3 Shouting over the filter half blocked. 4. Faulty motherboard or display board e, poor connection of indoor and outdoor units, plug connector contact, and bad low-voltage protection switch.

Solution: 1. Determine whether the ambient temperature is too low.

2. Determine whether it is a control fault or a system fault A, you can first short connect the LPP plug on the main control board and the neutral line N on the motherboard. If the indoor unit is running normally, it can be determined that the main board or display board of the indoor unit is fine, and the fault occurs on the connection cables, plug connectors, or low-voltage switches of the indoor and outdoor units. It is recommended to find professional maintenance personnel to operate.

3. Judge the connection line and plug of the indoor and outdoor unit A, adjust the multimeter to the ohm block, connect one meter pen to the LPP protection line unplugged on the motherboard, and connect the other meter pen to the neutral line N; If the resistance value is 0, it means that the fault is on the low-voltage switch, otherwise it is a circuit problem. It is recommended to find professional maintenance personnel to operate. Fiber permeability.

4. Use the pressure gauge to determine whether the system is leaking fluorine or blocked.

E3 error** usually indicates that the outdoor unit of the air conditioner is malfunctioning. Possible causes include:

1.Power failure or circuit failure of the outdoor unit oak family;

2.sensor failure or line failure of the outdoor unit;

3.The compressor of the outdoor unit is faulty or the wiring is quickly blocked;

4.The capacitor of the outdoor unit is faulty or the line of Liang Chang is faulty.

Many refrigeration systems are leakage, so it is necessary to check whether the air conditioner is missing Freon, and E3 means that the compressor of the air conditioner at this time has entered the low-pressure protection setting. If the air conditioner shows E3, it means that it is a pressure problem, at this time, it is necessary to focus on checking whether the refrigerant is missing, and the refrigerant is reduced, then it is necessary to add refrigerant to it, observe the operation of the air conditioner, and then see if the pressure switch is damaged. There is also a possibility that the radiators and filters of the internal and external units are too dirty.

It needs to be cleaned and the filter checked for clogging. It is also possible that the circuit board related circuit is damaged, so it is necessary to check if there is a problem with the circuit board. Use a capacitive pen to Zheng Mu to check whether the current of the circuit board is normal, if it is not normal, it means that the circuit board has a problem with the base, and the circuit board of the air conditioner needs to be replaced.

In the process of replacement, we must pay attention to the current of the air conditioner, at this time it is necessary to carry out power-off treatment, so as to ensure that in the process of repairing the air conditioner, the safety of the replacement person is guaranteed, and the power-off treatment can also be more convenient to check and find faults.