How to solve the P7 appearance of Hualing air conditioner?

1.Display P7 indicates that the communication between the display board and the indoor control board is faulty.

2.Cause of failure:

Because communication is a process of exchanging data between the CPU of the indoor control board and the CPU of the outdoor control board (the indoor sends control instructions to the outdoor, controls the operation mode of the outdoor unit, starts the compressor and other components; The outdoor unit sends the operating status and environmental parameters, faults, etc. to the indoor unit).

There are two lines of communication signal (signal line S and zero line N), and the four connecting lines of the internal machine and the external machine cannot be wrong, that is, the live wire L, the neutral line N, the signal line S, and the yellow and green lines of the grounding should be connected one by one. The communication circuit also has an independent DC power supply, which is generally rectified directly with 220V AC after step-down with a current limiting resistor, and the voltage is 24V (the design of each manufacturer may be different).

Therefore, the communication fault involves the control board of the indoor unit, the control board of the outdoor unit, and the communication line. The specific components involve the rectifier and voltage stabilization circuit of 24V DC power supply (this circuit is generally on the outdoor control board), indoor communication interface circuit (the main components are two optocouplers), outdoor communication interface circuit (there are also two optocouplers), etc., if the outdoor unit does not supply power or has 220V AC power but the CPU does not work (three conditions: +5V, clock, reset), the communication can not work normally.

3.Troubleshooting:

If there is a problem between the host and the control board, see if the signal light of the host and the control board is on, check whether there is a burning smell on both sides, and the following 3 situations will generally occur after observation!

The first treatment method: the interface of the control board and the interface connection of the host are loose, resulting in the communication failure of the control board on the LCD screen.

The second way to deal with it: that is, to see if the host and the control board are the original, there may be a mismatch, and you can replace the original factory.

The third treatment method: if the above two methods cannot be solved, it can only be sent back to the manufacturer for maintenance.

The fixed speed cabinet shows that P7 is: outdoor exhaust high temperature protection; The inverter cabinet shows that P7 is the compressor with the outdoor exhaust temperature too high.

The principle of air conditioning refrigeration refers to the principle of air conditioning refrigeration operation. After the air conditioner is energized, the low-pressure steam of the refrigerant in the refrigeration system is sucked in by the compressor and compressed into high-pressure steam and discharged to the condenser, and the indoor air is continuously circulated to achieve the purpose of reducing the temperature.

The outdoor air drawn in by the axial fan flows through the condenser, taking away the heat released by the refrigerant, causing the high-pressure refrigerant vapor to condense into a high-pressure liquid. The high-pressure liquid is sprayed into the evaporator after passing through the filter and throttling mechanism, and evaporates at the corresponding low pressure to absorb the surrounding heat. At the same time, the cross-flow fan continuously enters the ribs of the evaporator for heat exchange, and sends the cooled air to the room after heat release.

The air conditioner shows P7 and needs to see what type of cabinet it is: the fixed speed cabinet is protected by the high outdoor exhaust temperature, and the inverter cabinet is closed by the high outdoor exhaust temperature. Analysis of several common causes of failure:

1. The refrigerant balance is insufficient; Solve: Check to see if the refrigerant is leaking

If the prompt of P7 appears in Hualing air conditioner, it may be that its engine compressor is not working properly, and it may be caused by a lack of hair.

How to solve the problem of Hualing air conditioner P7 I think that such a situation should be that his Buddha is gone, so you can add some services, and be sure to find professional personnel to add, I think this will allow him to recover quickly, I think it's still very good.

Fault**:p 0 4 times continuous current protection.

The speed of the p1 indoor fan is out of control.

P2 The indoor panel and the switch board cannot communicate for 2 minutes.

P3 Indoor evaporator temperature sensor open or short circuit.

P4 Indoor room temperature sensor open or short circuit.

P5 The room fan temperature fuse is disconnected.

P6 zero-crossing detection failure.

The P7 model is selected incorrectly.

Out of the air conditioning fault **p7 maintenance, look at the after-sales service to let the customer service call the master to the door, their own repair is not good.

In this case, you can find a professional to carry out effective debugging, and the maintenance can achieve the ideal operation.

In general, you can recommend, restart, and blow reboot comparison.

Hello, first unplug the power. Then call the after-sales customer service, and they will arrange for the master to come to repair.

Summary. The extension that you have to give you is: clean the filter regularly:

Aircon filters should be cleaned or replaced regularly, usually once a month or according to the manufacturer's recommendations. Dirty filters can obstruct air flow, affect the effectiveness of air conditioning, and may lead to a decrease in indoor air quality. Clean indoor and outdoor air ducts:

Clean air conditioning ducts regularly both indoors and outdoors to remove dust, dirt, and other impurities. Dirty air ducts affect air flow and cooling efficiency.

Kiss will be happy to answer for you:1Check whether the power supply and wires are connected normally; 2.

Check whether the electronic components inside the air conditioner are normal, such as capacitors, electrolytic capacitors, transformers, etc.; 3.Clean the filter and heat exchanger inside the air conditioner to ensure the normal ventilation of the mammoth ear air conditioner; 4.It is also more tolerant of the replacement of damaged branches.

Kiss, check the electrical Liandong town destruction The method of the brigade circle is to check the electrical connection. Electrical faults are one of the common causes of P7 failures. We need to check if the electrical connection of the air conditioner is working properly.

The way to check the electrical connection is to turn off the backup power source and check whether the electrical wiring is loose or broken.

The extension to your relatives is: Clean the filter regularly: The air conditioner filter should be cleaned or replaced regularly, usually once a month or according to the manufacturer's recommendations.

Dirty filters can hinder air flow, affect the effectiveness of air conditioning, and may cause a decrease in indoor air quality. Clean indoor and outdoor air ducts: Clean indoor and outdoor air conditioning ducts regularly to remove dust, dirt, and other impurities.

Dirty air ducts affect air flow and cooling efficiency.

Summary. Winstar air conditioner P17 failure usually refers to the compressor overload protection of the outdoor unit. This failure is generally caused by:

High Pressure Protection: When the high pressure is too high due to reasons such as clogged condenser or pipes, fan failure, or too much refrigerant, the compressor will automatically shut down to prevent damage. Low Voltage Protection:

When the low pressure is too low due to air leakage in the evaporator or line of the outdoor unit, insufficient refrigerant, or failure of the electronic expansion valve, the compressor will automatically shut down to prevent damage. To troubleshoot the P17, you can try the following steps: Check the condenser and fan of the outdoor unit:

Make sure the condenser is not clogged and the fan is functioning properly. If a blockage or fan failure is found, clean or replace the corresponding part. Check the refrigeration dose:

Check the tubing and electronic expansion valve of the outdoor unit for leaks or faults. If a problem is found, it needs to be repaired or replaced. Restart the air conditioner:

Try restarting the air conditioning system by disconnecting the power supply. Turn off the power switch on your air conditioner and wait a few minutes before turning it back on. This can sometimes resolve some temporary glitches or system errors.

If the above steps cannot solve the P17 fault, it is recommended to contact the after-sales service center or professional maintenance personnel of Winstar Air Conditioner. They can provide more specific troubleshooting and solutions, or arrange for on-site repairs. Please note that in order to ensure safety and proper operation, please follow the user manual of Winstar Air Conditioner or consult the advice of a professional.

My question.

Winstar air conditioner P17 failure usually refers to the compressor overload protection of the outdoor unit. This failure is generally caused by the following reasons: High Voltage Protection:

When the high pressure is too high due to reasons such as clogged condenser or piping of the outdoor unit, failed fans, or too much refrigerant, the compressor will automatically shut down to prevent damage. Low pressure protection: When the low pressure is too low due to air leakage in the evaporator or pipeline of the outdoor unit, insufficient refrigerant, or failure of the electronic expansion valve, the compressor will automatically shut down to prevent damage.

To resolve the P17 fault, you can try the following steps: Check the condenser and fan of the outdoor unit: Make sure that the condenser is not clogged and the fan is working properly.

If a blockage or fan failure is found, clean or replace the collapsed part. Check the refrigeration dose: If the refrigerant is insufficient, it may cause the low pressure protection to trigger.

If a problem is found, it needs to be repaired or replaced. Restart the air conditioner: Try restarting the air conditioner system by disconnecting the power supply.

Turn off the power switch on your air conditioner and wait a few minutes before turning it back on. This can sometimes resolve some temporary glitches or system errors. If the above steps cannot solve the P17 fault, it is recommended to contact the after-sales service center or professional maintenance personnel of Winstar Air Conditioner.

They can provide more specific troubleshooting and solutions, or arrange for on-site repairs. In order to ensure safety and proper operation, please follow the user manual of Winstar Air Conditioner or consult professional advice.

Winstar air conditioner display p4 hello p4 means: indoor evaporator protection off compressor (high or low temperature) e2t2 rubber key shirt sensor fault. In general, this kind of P4 disorder problem should be examined from the following three aspects.

1. Check whether the temperature sensor can really detect the temperature, it is also very convenient to detect the temperature at home, you can use a thermometer to measure whether it is consistent with the temperature detected by the temperature sensor, if it is inconsistent, it means that the temperature sensor can not detect the temperature, indicating that there is a problem with the sensor, and replacing the sensor in time can solve the problem. 2. If the above problems do not exist, you can check whether the cable of the temperature sensor is aging, and the aging of the sensor cable will also make the sensor unable to detect the change in temperature, if it is aging, please replace the cable. 3. After ruling out these two reasons, use a multimeter to detect whether the temperature signal on the motherboard can be received, and if there is no problem with the above two items, it is recommended to replace the motherboard.

P4 Indoor Evaporator Protection Off Compressor (High or Low Temperature) E2T2 Sensor Failure. In general, in this case, the beam cavity, that is, the tube temperature sensor in the machine, is broken, and it is recommended to contact a professional to replace it.