High and low temperature alternating test chamber refrigeration compressor repeated start how is it? When Anderson visited the customer, he found that some customers would raise such questions. In fact, under the normal working conditions, the number of opening and stopping of refrigeration compressors should not exceed six times per hour. Each time interval should be greater than 3 minutes. Seen as a failure.
What is the main reason why the compressor starts and stops too often? The following Wuhan Anderson answers the reasons and solutions for you, hoping to help more users.
1. The condenser has poor heat dissipation;
The poor cooling effect of the condenser will reduce the cooling capacity of the high-low temperature test chamber compressor, causing the compressor to run overloaded, causing the operating current to increase, causing the over-current protection relay to act to shut off the power supply, and the compressor will stop operating. When the protection relay bimetal senses that the temperature has dropped to the reset temperature, the contacts are closed again and the compressor is started again, causing the compressor to start and stop frequently. The main causes of the poor cooling effect of the condenser are: dirt on the surface of the condenser; the ambient temperature of the test chamber is too high.
Solution: Clean the contaminants of the condenser regularly; improve the cooling conditions of the high and low temperature test chambers.
2. The power supply voltage is too high or too low, and unstable;
Solution: After the power supply voltage returns to normal, turn on the power supply or install an AC voltage regulator to provide a stable 380V power supply for the high-low temperature test chamber.
3. The door seal of the high and low temperature alternating test box is not strict and the air leakage is serious;
Solution: Overhaul the door seal or replace the door seal.
4. The over-current over-temperature protection relay disc bimetal failure;
Solution: Replace the new over-current over-temperature protection relay.
In fact, a good high and low temperature alternating test box should also have the following conditions of use 1. Power: AC380V ± 10%, 50HZ, KW (three-phase four-wire system)
2. Use environment: Temperature: 5°C～35°C, relative humidity: ≤85%RH
3. Main Power Switch: Due to the electrical characteristics of the knife switch and the power socket itself, if it is used as the power switch of this equipment, it will cause equipment hazards, require the use of aerodynamic switches and with leakage protection
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