Common faults and coping methods of low temperature refrigerators

Common faults and coping methods of low-temperature refrigerators Although the refrigeration system and control circuit of low-temperature refrigerators are relatively complex, the common faults are mainly the circulation system and circuit part faults.
The following briefly introduces several common faults and their troubleshooting methods
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1.
After the power is turned on, the air switch of the main power supply is automatically disconnected.
Remedy: Check whether the compressor of the refrigeration system is damaged.
If it is damaged, it will cause a short circuit and cause power protection
.

Parts can be replaced.
If there are no original parts, you can replace the refrigerator compressor with a comparable power after calculation, weld the pipeline, and check the air tightness of the pipeline after pressurizing.
After vacuuming and adding R-12 freon 23.
00z, turn it on again.
Check if it is normal
.

This fault is generally caused by unstable power supply, because the first stage starts first, so the damage is usually in the first stage
.

2.
The temperature in the box has stopped working before reaching the set temperature.
Remedy: Although the box has not reached the set temperature, the panel display temperature has reached the set temperature
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This is because the thermistor that detects the temperature is damaged and needs to be replaced
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If the original parts are not available, a temperature control system can be re-installed
.

3.
The refrigeration effect of the refrigerator is reduced, and people feel electric shock when touching the metal part of the box.
Elimination method: use a multimeter to measure the leakage of the refrigerator, and use the segmentation method to check
.

When energizing the high-temperature stage compressor alone, check whether the whole box is electrified due to the leakage of the compressor
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Statically check the compressor terminal, pay attention to observe the lead plug part of the motor winding, if there is a trace of ignition with the casing, it indicates that there is leakage
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The method of replacing the terminal part and the surrounding part of the shell is adopted.
After installing the body, turn it on to make it run, and check whether there is any leakage.
After the indicators of the compressor are normal, put it back on the base of the low-temperature refrigerator, connect the pipes, and check the Leakage, evacuating, and charging appropriate amount of refrigerant to restore the refrigerator to normal operation
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The above is an introduction to the common faults of low-temperature refrigerators and their countermeasures.
I believe that everyone has a corresponding understanding of this after reading, mastering the corresponding matters, and they can be handy in the use center.
I hope it will help you
.