The following is a detailed analysis of common faults and troubleshooting methods of high-speed cryogenic centrifuges, combined with electrical, mechanical, refrigeration and other system faults for classification and explanation:

1、 Electrical system malfunction

1. Power supply issue

-Phenomenon: The centrifuge does not start, the indicator light is abnormal, or the speed is insufficient.

-Reason and handling:

-Check the power cord, socket, fuse, and distribution board. If the fuse is blown, it needs to be replaced.

-If the voltage is too low (below 180V), check the grid voltage or adjust the length of the power line (ideally ≤ 3 meters).

-Control circuit faults require troubleshooting of components such as relays and rectifiers, and replacement of chips or control panels if necessary.

2. Motor malfunction

-Phenomenon: The speed does not meet the standard or the motor makes abnormal noises.

-Reason and handling:

-When the wear of the carbon brush exceeds 1/3, it needs to be replaced, and at the same time, check whether the contact between the brush and the commutator is good.

-Motor coil short circuit or open circuit needs to be detected with a multimeter, and if necessary, the coil should be rewound.

-The lack of oil or dirt in the bearing leads to increased resistance, and the bearing needs to be cleaned or replaced.

2、 Refrigeration system malfunction

1. Temperature control failure

-Phenomenon: It can cool but cannot set the temperature.

-Reason and handling:

-Replace the temperature control chip or control panel. If the voltage is normal but the chip is abnormal, try transplanting the old device chip.

-The temperature sensor wrapped around the body needs to be replaced due to sensor malfunction.

2. Poor cooling effect

-Phenomenon: The set temperature is normal but cannot be lowered.

-Reason and handling:

-Check the amount of Freon and replenish it if it is insufficient.

-Clean the dust from the radiator, ensure good ventilation, and avoid direct sunlight.

3、 Mechanical component failure

1. Rotor and balance issues

-Phenomenon: The body vibrates violently and produces abnormal noise.

-Reason and handling:

-Check for foreign objects in the rotor holes, loose shaft nuts, or worn rotors, and promptly clean or replace them.

-Ensure symmetrical and balanced weight of the centrifuge tube to avoid overspeed or overload operation.

2. Head turning damage

-Phenomenon: Centrifugal tube rupture, sample leakage.

-Reason and handling:

-To avoid chemical corrosion, temperature runaway, and metal fatigue, strictly control the speed and centrifugal force.

-Regularly check the safety factor of the rotor and replace aged or damaged rotors.

4、 Operation and maintenance issues

1. Human error in operation

-Phenomenon: Program error, device damage.

-Reason and handling:

-Familiarize yourself with the instruction manual before operation to avoid unbalanced loading or incorrect parameter settings.

-It is strictly prohibited to forcefully operate abnormal equipment to prevent secondary damage.

2. Long term use aging

-Phenomenon: Decreased performance of electronic components (such as aging of optoelectronic devices).

-Reason and handling:

-Regular maintenance, such as lubricating bearings, cleaning sensors, and checking electrical connections.

-Timely replace vulnerable parts such as sealing rings and carbon brushes.

5、 External environmental faults

1. Environmental factors

-Phenomenon: Intermittent malfunction of the equipment.

-Reason and handling:

-Avoid installing equipment near high humidity, magnetic field interference, or vibration sources.

-Keep the ambient temperature stable (recommended 15-25 ℃) and regularly clean the internal dust.