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Although the cooling system and control circuit of cryogenic storage boxes are relatively complex, common faults are mainly failures in the circulation system and circuit parts;
Here are some common problems in cryogenic storage boxes: Troubleshooting and Troubleshooting.
1. After power on, the air switch of the main power supply will automatically turn off
Troubleshooting method: Check the compression of the cryo storage box cooling system. Check whether the machine is damaged. If damaged, it will cause a short circuit and current protection.
Parts can be replaced. If there are no original parts, you can replace the refrigerator compressor with a compressor of comparable performance and weld the pipe;
After Adding After checking the airtightness of the pipeline, extract and add R-12 Freon 23.00z and turn on Sthen turn it on to check if it is normal.
Cause of error: This error is usually caused by an unstable power supply. Since the phase begins first, the damage is usually in the phase;
In this case, the error will generally not reoccur as long as a delay-stabilized power supply is installed.
2. The temperature inside the box stops working before it reaches the set temperature.
Troubleshooting method: Although the temperature inside the box has not yet reached the set temperature, the panel The temperature displayed has reached the set temperature.
This is because the thermistor used to measure temperature is damaged and needs to be replaced. If the original parts are no longer available, you can reinstall a temperature control system to correct the error.
3. The cooling effect of the refrigerator wis reduced and people feel electric shock when they touch the metal parts of the box.
Troubleshooting method: Use a multimeter to measure the leakage of the refrigerator and use a meter to Inspection using the segment method.
When the high temperature compressor is turned on alone, check whether the low temperature storage box is energized due to compressor leakage.
Static inspection of the compressor connection, pay attention to the motor winding connection plug. If there are traces of sparks on the case, this indicates a leak.
Use the method of replacing the connection part together with a part of the surrounding casing, install the machine casing, turn on the power and check for leakage.
If all indicators of the compressor are normal, put it back on the bottom of the cryo-storage box, connect the pipes, check for leaks, evacuate and charge the appropriate amount of refrigerant to restore the refrigerator to normal operation.
