Common faults and maintenance of Midea inverter air conditioners

There are many kinds of air conditioning faults, and when encountering faults, learn how to detect them first, and then determine the fault to solve them.

1. Query method of inverter air conditioner detector: connect the inverter air conditioner detector to the wiring interface reserved by the outdoor electric control box. Press the "Query" button to enter the query display mode, and the display display shows FR (operating frequency).

2. Press the button to select the information you want to query, and the query information is in the following order: OT (reserved), FL (outdoor frequency limiting state), CF (compressor fault state), SF (outdoor unit fault state), SN (current indoor unit status), OD (operation mode), LR (expansion valve operating opening), PR (DC fan operating speed), OF (outdoor unit failure), NF (indoor unit failure), DT (outdoor load target frequency), TT (indoor set temperature), UO (voltage value), DL current value), TH (return air temperature temperature value), TP (exhaust temperature temperature value), T4 (room temperature ambient temperature value), T3 (outdoor pipe temperature temperature value), T2 indoor pipe temperature temperature value), T1 room temperature temperature value), FT (indoor target frequency, FR (operating frequency).

3. According to the fault ** or display value displayed in the query information, judge the specific location of the fault and troubleshoot. Press the "Query" button again to exit the query display.

Hope it can help you, thank you.

After years of use, the air conditioner will inevitably have various small conditions, so it must be repaired in time, otherwise the problem will become more and more serious. You can use methods such as looking, listening, touching, and measuring to check what is wrong with the air conditioner. According to relevant statistics, the common faults of air conditioners are as follows:

1. Refrigerant leakage;

2. Leakage of the line;

3. Blockage of refrigeration system, air filter, air inlet and air outlet;

4. The electrical line is disconnected;

5. Burning group of compressor and fan motor;

Summer is here, and people are turning on their air conditioners, ready to enjoy the rare refreshment of summer. But at this time, if the air conditioner is not cooling, then it is really heartburn. There are generally two reasons why the air conditioner cannot be cooled, which may be caused by a lack of refrigerant, or the air conditioner has not been cleaned for a long time.

At this time, you can first take a look at the situation of the filter and heat sink, if it is seriously dirty, you can clean it first to see how the refrigeration effect is. If it still doesn't work, it is necessary to consider whether it is caused by the lack of refrigerant, at this time, it is necessary for professionals to use a measuring tool to measure first, see how much is missing, see if there is a leak, etc., and then repair it, and then replenish the sufficient amount of refrigerant.

Generally speaking, the outdoor unit of the air conditioner will only drip, but if the indoor unit at your home is dripping, then everyone should pay attention. Generally speaking, there are two main reasons for the dripping of the indoor unit: 1. The installation of the air conditioner is unbalanced, and if it is in a horizontal position, this situation usually does not occur.

2. Another reason is that the drain pipe of the air conditioner is blocked or bent, but the internal water cannot flow out. In this case, the user can take a look at it first, and the problem of the drain pipe can usually be solved smoothly.

Generally speaking, the air conditioner will not make a lot of noise during operation. If the air conditioner in your home is making a lot of noise while working, then it must be out of order. There are generally two reasons for the noise of the air conditioner:

1. The first reason is that the bracket of the external machine is not stable, or it is not in a horizontal position, which will make the external machine noisy when it is running, and it is necessary to rearrange it at this time, and tighten the unstable bracket with screws; 2. Another reason is that the wind speed of the air conditioner is relatively large, and the speed of the air outlet is also large, resulting in a relatively loud noise. At this point, you need to reduce the wind speed, and you can do it.

1. First of all, check whether there is electricity in the "connection" of the air conditioner power supply?

2. Is the fuse in the air conditioner circuit board (or not) normal (or) blown ......?

3. The air conditioner is set to the temperature mode of "refrigeration" or (heating). Set whether it is (correct) ......4. ...... the failure of the "main control board" or "frequency conversion" to drive the "module"?

5. Need professional maintenance "personnel" on-site inspection ......?

6. There are some unprofessional maintenance companies, perhaps because there is little work (finding) and nothing to do, (or) low-level work. However, charging for damaged accessories (or) other reasons, without our knowledge, the money is unjustly spent, and in the future, when we use it, there may be some problems in the process: "There will be no security in the future."

For details, please call us or make an appointment

E1: The power module is overheated, overcurrent, or short-circuited.

e2: The current sensor induces too little current.

E4: The temperature sensor of the press exceeds 120 when heating.

E5: Overcurrent protection.

E6: Outdoor temperature sensor is faulty.

E7: Outdoor coil sensor failure.

EA: The power supply is over undervoltage.

EC: Outdoor heat exchange sensor temperature over 70 protection when cooling.

EE: There is an error in reading EEPROM data from the microcontroller.

F1: Room temperature sensor failure.

F2: Indoor coil sensor fault.

F4: The indoor coil sensor is more than 72 protected during heating.

F5: Indoor coil temperature sensor below 0 during refrigeration.

F7: The communication between the indoor motherboard and the control panel is faulty.

1. E0 - (EEPROM parameter failure).

Scope of failure: internal electrical control motherboard, CPU memory.

Maintenance method: check whether the working conditions of the memory are normal, this fault is generally the storage data mess maintenance method: replace the motherboard or the storage with data.

2. E2 (zero-crossing detection fault).

Scope of failure: internal motherboard.

3. E3 (indoor fan speed out of control fault).

Scope of fault: The main board, internal fan, and wind turbine of the internal machine are stuck.

Maintenance method: first turn the wind wheel to see if it is stuck, and then turn on the machine to the air supply to see if the fan is rotating, not rotating [there is power supply, the capacitance is normal, the motor is broken, there is no power supply to test the motherboard is bad] The wind speed of the fan is not adjustable [the detection feedback voltage, the operation is stationary for the power supply is 12V, and the normal voltage is measured is the motherboard is bad].

4. E6 (room temperature sensor failure).

Fault range: T3 outdoor pipe temperature, T4 outdoor ring temperature, TP compressor exhaust temperature, external electrical control box maintenance method: when the T3 and T4 sensors are measured at 25 degrees, the normal is 10K, and the TP is 56K.

The resistance value is normally determined to be damaged by the motherboard, and the DC voltage can be measured [generally around the left] to further determine which sensor control circuit is damaged.

5. P1 (over-voltage or under-voltage protection).

Scope of failure: external electrical control

Maintenance ideas: use the clamp current meter to measure whether the air conditioning voltage meets the minimum working voltage, and use the frequency conversion board to check the voltage, see if it is the same as the clamp meter, if the deviation is large, the external electrical control box is faulty.

Gree: Inverter cabinet machine E1-E5E1: press overcurrent, overheating, exhaust over-high, module protection; E2: Indoor anti-freezing protection;

E3: Indoor temperature temperature sensor package open, short circuit;

E4: Indoor pipe temperature open, short circuit;

e5: Indoor and outdoor communication failure.

Midea air conditioner, Midea inverter cabinet machine air conditioner failure**:

Inverter cabinet machine 1, KFR-50LW BPY, KFR-50LW FBPY, KFR-61LW FBPY inverter cabinet machine.

The LCD of the indoor unit displays protection information** (recoverable protection) KFR-50LW BPY, KFR-50LW FBPY, KFR-61LW FBPY indoor unit fault indication**.

Content P01: The communication between the indoor board and the outdoor board for 2 minutes does not protect P02

The IPM module protects P03

High and low voltage protection P04

Indoor temperature sensor open or short circuit (room, temperature) P05

Outdoor temperature sensor open or short circuit (condenser, ambient, exhaust temperature) P06

Indoor evaporator temperature protection off compressor (high or low temperature) P07

Outdoor condenser high temperature protection off compressor P08

The room temperature in the dehumidification mode is too low, and the compressor P09 is turned off

The outdoor exhaust air temperature is too high to turn off the compressor P10

Compressor top temperature protection P11

Defrost or protect against cold air P12

The temperature of the indoor fan is overheated P13

The indoor board and the switch board cannot communicate for 3 minutes.

The indoor main control board LED display indoor unit is provided with 5 LEDs, of which LED0 is the working indicator, LED0 is bright when normal, and LED0 is 5Hz when abnormal

The frequency of the flashing KFR-50LW BPY, KFR-50LW FBPY, KFR-61LW FBY indoor main control board fault indication LED4

led3led2

led1led0

LED status.

12 years of overwarranty, Midea air conditioning shows that E1 is a compressor high-pressure protection, some may be on for a long time, compressor thermal protection, shutdown cleaning and cooling troubleshooting, this is the most likely, in addition to sensor failure, motherboard failure needs to be repaired, the possibility is relatively small.

The reasons are: Sensor failure The expansion is as follows: Protection** Indicates content Fault** Indicates content P3 High and low voltage protection (for inverters) P4 Indoor evaporator protection off compressor (high or low temperature) P5 Outdoor condenser high temperature protection off compressor P7 Outdoor exhaust temperature is too high off compressor (for inverter) E4 T4 Sensor failure (for inverter) p....

1. Midea's inverter air display P0 indicates IPM module protection. In this case, you should observe whether the installation of the whole machine meets the requirements of the installation specification and whether the heat dissipation is good. Check whether the system pressure, voltage and external fan speed are normal.

2. Disconnect the power supply of the whole machine, and use a multimeter to detect the three-phase winding resistance of the compressor body after the whole machine is finished, and the three-phase resistance is equal, whether there is phase loss, short circuit and leakage fault. Check the output voltage of the outdoor unit module, and test whether the P-W, U, V resistance of the module, N-W, U, V resistance is normal.

3. If you encounter this situation, please call the after-sales 4008899315 of Midea directly and ask it to arrange staff for maintenance. In general, air conditioners have a certain warranty period. If there is a problem within this period, contact customer service to enjoy on-site maintenance service.

Air conditioning in the summer is a kind of electrical equipment that is used more frequently in every family, air conditioning brings us a cool temperature, but air conditioning occasionally makes some small faults that affect our use effect, air conditioning failures generally show faults, but many people do not know what this fault ** means, resulting in inability to repair, I believe that some people are installed at home is the United States inverter air conditioner, Midea inverter air conditioning sometimes fault shows some**People do not know Shengzheng, In order to help you understand, we will explain to you the inverter failure of the air conditioner in the United States**, I hope to help you.

Midea air conditioner model specifications are printed on the machine packaging and the nameplate on the side of the fuselage, in addition, Midea air conditioners have a unique machine barcode identification, pasted on the fuselage, installation card and warranty card, there are also machine models on it, through these models we can know some basic information of the product, for the convenience of purchase.

Midea air conditioning model by letters, numbers and symbols, all have their own meaning, take the model KFR-35GW dy-X (E2) as an example, K stands for air conditioner, F stands for split, R is cold and warm dual system, 35 means that the power is 3500W, G is to say that the indoor unit is a wall-mounted machine, W is an outdoor unit, D means that there is auxiliary electric heating, Y is remote control, X is the appearance series of the model, and E2 represents level 2 energy efficiency.

There are many Midea air conditioner faults, users can know what the fault is according to**, indoor unit fault display E0 represents EEPROM parameter error, E1 indoor and outdoor unit communication failure, E2 zero-crossing detection error, E3 fan speed, E4 temperature fuse break protection, E5 outdoor temperature sensor failure, E6 indoor temperature sensor failure, P0 module protection, P1 voltage too high or too low protection, P2 compressor top temperature protection.

1. Energy saving: Because the inverter air conditioner is equipped with a built-in inverter, the operating speed of the compressor can be adjusted at any time, so as to achieve reasonable use of energy;

2. Low noise: due to the balanced operation of the inverter air conditioner, the vibration is reduced, and the noise is also reduced;

3. High temperature control accuracy: it can control the cooling (heat) capacity of the air conditioner by changing the speed of the compressor. Its refrigeration (heat) has a change range, such as the refrigeration capacity of 36GW frequency conversion changes to 360-4000W, and the heating change is 300-6800W, so the indoor temperature control can be accurate to 1, so that the human body feels very comfortable;

4. Fast temperature adjustment speed: when there is a large difference between the room temperature and the withering temperature, the inverter air conditioner will work with large power as soon as it is turned on, so that the room temperature will rise or fall rapidly to the set temperature, and the refrigeration (heat) effect will be obvious;

5. Low voltage requirements: inverter air conditioners have strong adaptability to voltage, and some inverter air conditioners can even be started at 150-240V voltage;

6. Low ambient temperature requirements: the adaptability of inverter air conditioners to ambient temperature is quasi-strong, and it can even be started at an ambient temperature of 15t;

7. One-in-two intelligent temperature control: it can intelligently identify the size of the room and allocate the amount of cold (heat), so that rooms of different sizes can maintain the same temperature.