Прибор обнаружения неисправностей в холодильнике универсальной инверторной платы компрессора соленоидного клапана вентилятора демпфера 12V электрического ремонта включен.

Прибор обнаружения неисправностей в холодильнике универсальной инверторной платы компрессора соленоидного клапана вентилятора демпфера 12V электрического ремонта включен.

Refrigerator fault repair tool General inverter board Compressor Solenoid valve Fan Air door 12V Electric valve Detector

Detectable: single-signal frequency conversion board, dual-signal frequency conversion board, frequency conversion compressor, output voltage: 220v, single air door, double air door, pulse solenoid valve, 12v electric switching valve, DC fan.

Click to watch: Refrigerator DC fan detection video

Click to watch: Refrigerator electric damper detection video

Click to watch: Refrigerator single line number inverter board startup inverter compressor detection video

Click to watch: Refrigerator dual-signal inverter board to start inverter compressor detection video

Electric damper detection

Connect the damper detection line to the damper motor connector in the order of red, yellow, blue, and white as shown in the figure. (Note: The default program is a single air door.) Click the air door button, the air door indicator light is on, and the display shows 176. When the air door is fully opened, the air door indicator light is off. Press the air door button again, the air door indicator light is on, and the display shows 176. When the air door is completely closed, the air door indicator light goes out. If the damper opens and closes smoothly, the damper is normal. If the damper does not turn, the opening and closing is not smooth or there is a phenomenon, it means that the damper is malfunctioning.

Note: The dual air door test needs to pass the setting. The setting method is as follows: long press the setting button, then press the air door button, the display shows FdU, release the setting button and the air door button at the same time, and then press the setting button, the display shows 176 , Select and long press the "+, -" key, set it to 635. Long press the return key, the setting is successfully saved.

Electric switching valve detection

Connect the electric valve to the detector as shown in the figure, press and hold the electric valve button for 3~5 seconds, the display shows -0, the spool returns to the starting position, and the inlet is connected to port A at this time. Click and press the electric valve button once, the display shows -18, and the inlet is connected to port B at this time. Click and press the electric valve button for the second time, the display shows -36, and the inlet is connected to port C at this time. Click and press the electric valve button for the third time, the display shows -54, and the inlet is connected to the BC port. After the above detection the electric valve is switched normally, the electric valve can be judged to be intact. If the electric valve has no switching action, the electric valve is faulty.

Note: The above operation method is to open the electric valve, close the electric valve, press and hold for 3~5 seconds, it will display 0, 18, 36, 54.

DC fan detection

Connect the DC fan to the detector in the order of positive (+), negative (-), and feedback as shown in the figure. Press the fan button, if the fan speed is normal, the display shows the real-time feedback signal frequency (speed) of the fan, and the fan is in good condition. If the fan does not rotate or the display shows E1 after 10 seconds, it can be judged that the fan is faulty.

Note: a certain brand of four-wire fans can also be tested

Purple: fan feedback signal

Red: fan +12v

Black: fan ground wire (GND)

Bistable pulse solenoid valve test three

As shown in the figure, connect the solenoid valve detection line to the solenoid valve interface, click the solenoid valve button, the display shows 10, it is a positive pulse, press the solenoid valve button again, the display shows -10, it is a negative pulse. You can hear the reversing sound of the solenoid valve. If there is no reversing sound, it can be judged that the solenoid valve is faulty. (Attention! The solenoid valve detection line outputs pulse voltage, please do not touch it during use. The solenoid valve detection line outputs pulse voltage, and the DC voltage range of the multimeter is about 100V)

Single wire signal frequency conversion

As shown in the figure, connect the frequency conversion board detection line to the communication interface of the frequency conversion board, and then connect the output end of the frequency conversion board to the compressor, and then supply 220v power to the frequency conversion board. Press the single-wire frequency conversion signal key, the tester outputs a start signal, and the compressor can be started, which can be eliminated one by one. (Note! The inverter boards are all normal. If it does not start, please use the compressor detection function to check the compressors and eliminate them one by one. (Note! Once the compressor is started, it will take more than 5 minutes to test again, and the test will be performed after the system pressure is balanced).

Note: When testing with a new compressor, remove the rubber plug!

Note: The single-wire frequency conversion signal interface has two wires (red and black wires). Use the red wire to start the single-wire signal frequency conversion board.

Two-wire signal frequency conversion

As shown in the figure, connect the inverter board detection line to the inverter board communication interface (need to distinguish between positive and negative), and then connect the inverter board output end to the compressor, and then supply the inverter board with 220v power supply. Press the two-wire signal frequency conversion key. The tester slowly performs automatic frequency upscaling to reach the set frequency. When the inverter compressor is started, eliminate them one by one. If: When the frequency is set at 40~50Hz, the frequency will rise at 1Hz every second until the frequency is set. (Note! The inverter boards are all normal. If it does not start, please use the compressor detection function to check the compressors and eliminate them one by one. (Note! Once the compressor is started, it will take more than 5 minutes to test again, and the test will be performed after the system pressure is balanced).

Note: Remove the rubber plug when testing with a new compressor! Need to distinguish the positive and negative poles of the communication interface.

Fixed frequency compressor inspection

Connect the compressor detection line to the refrigerator compressor as shown in the figure, and press the single-wire frequency conversion signal key. Output voltage: 220v, which can directly start the compressor. If the compressor does not start, you can

Determine the compressor failure. (Note! Once the compressor is started, it will take 5 minutes to test again

It will be tested after the system pressure is balanced).

Note: The fixed frequency compressor must have a starter and a protector.

Note: When testing a new compressor, remove the rubber plug.

Inverter compressor inspection

Connect the compressor detection line to the refrigerator inverter compressor as shown in the figure, and press the two-wire signal frequency conversion key. The tester will slowly increase the frequency automatically to reach the set frequency. When the inverter compressor is started, eliminate them one by one. If: When the frequency is set at 40~50Hz, the frequency will rise at 1Hz every second until the frequency is set. If the compressor does not start, it can be judged that the compressor is malfunctioning. (Note! Once the compressor is started, it will take more than 5 minutes to test again, and the test will be performed after the system pressure is balanced).

Frequency adjustment: After the compressor is started, the operating frequency can be adjusted by turning the frequency adjustment knob. At the same time, the display shows the current frequency value, which is convenient for observing the working status of each frequency band of the refrigerator.

Note: When testing a new compressor, remove the rubber plug.

Inverter compressor fault code light

If the inverter compressor is faulty, watch the inverter fault light on the tester, and confirm the number of flashes of the LED light on the inverter board. The specific fault cause investigation and maintenance plan are as follows:

Number of flashes

Fault content

Approach

Remarks

1

Overcurrent protection

Replace the inverter compressor

1. The flashing interval is 0~5 seconds, and the repeating alarm interval is 1 second;

2. In the power-on state, after 5 minutes of shutdown protection, try to start the compressor again.

2

Phase protection

Check the compressor connection line

3

failed to activate

Replace the compressor

Applications:

Detector application example 1

A Haier refrigerator user said that it does not refrigerate, and the repairer found that the inverter compressor was not working after a visit by the repairer. The tester used the tester to determine that the fault was that the inverter board was broken. Haier refrigerators have a lot of internal leaks. The master uses the compressor detection function to directly start the compressor and let it work for 1 minute. There is no temperature rise when touching the high-pressure tube by hand. It is judged that there is a pipeline leak, and after communicating with the user, pull it back to the store to change the tube and the inverter board. Perfect repair, avoiding the embarrassment that the compressor is working but still not cooling after changing the inverter board. Win the trust of users and improve maintenance efficiency.

Tester application example 2

A user said that the refrigerator at home is not cooling. The repairer found that the inverter compressor was not working. The detector was judged to be a compressor failure. The refrigerator often has internal leakage. To ensure that there is nothing wrong with the user, open the process port with the user’s consent and no refrigerant spray. Out. Inform the user that he needs to go back to the store to replace the compressor and replace the pipeline. After the user agrees, he will be pulled back for repair.

Tester application example 3

A user said that the refrigerating room of the refrigerator at home was not cooling, and the master came to detect that the solenoid valve did not change direction. The tester judged that the solenoid valve was faulty, and the solenoid valve was replaced after the user was quoted. Troubleshooting
.

Tester application example 4

A Haier refrigerator user said that it does not refrigerate, and the repairer found that the inverter compressor was not working after a visit by the repairer. The tester used the tester to determine that the fault was that the inverter board was broken. Haier refrigerators have a lot of internal leakage. The master uses the compressor detection function to directly start the compressor, let it work for 1 minute, and feel the high-pressure tube hot. After judging that the pipeline is normal, quote the user. Quick repair, win the trust of users, and improve maintenance efficiency.

Tester application example 5

A user of a refrigerator said that it does not refrigerate, and the repairer found that the inverter compressor was not working after a visit by the maintenance master. The tester judged that the inverter board and the compressor were both good. Then use a multimeter to measure the main board and find that the 12V power supply is only 9.5 volts. Observe that the power supply filter capacitor has a slight bulge. The refrigerator works normally after replacement. Perfect repair, win the trust of users, and improve repair efficiency. Avoid detours.