If your constant temperature and humidity test chamber is experiencing a cooling failure, it can be a frustrating and time-consuming issue. Troubleshooting this problem requires a systematic approach to identify the root cause. Below are some common causes and steps you can take to diagnose the issue, based on the experience of Beijing Yashilin.
1. First, check whether the refrigeration compressor starts when the test chamber is in operation. If the compressor runs normally, it suggests that the electrical circuit from the main power supply to the compressor is functioning correctly, and there is no electrical failure.
2. If the electrical system is not at fault, move on to checking the refrigeration system itself. Start by examining the discharge and suction pressures of the low-temperature compressors (R23 or R404) in both refrigeration units. If these pressures are below normal levels, especially if the suction pressure is low or evacuated, it could indicate that the refrigerant charge is insufficient.
3. In a safe condition, touch the discharge and suction lines of the R23 or R404 compressor. If the discharge line doesn't feel hot and the suction line isn't cold (no frost formation), this may be a sign that the refrigerant level is too low in the main unit.
4. Check the large pressure gauge located behind the test chamber. If the reading is close to "0" or less than "1," this indicates that the refrigerant has been depleted. In such cases, you should contact the manufacturer to replenish the refrigerant and restore normal operation.
Note: If the above steps do not resolve the issue, it's recommended to reach out to the manufacturer for professional assistance. Some problems may require advanced diagnostics or specialized tools that are not available to end users.
By following these steps, you can quickly determine whether the issue lies with the refrigerant levels or another component of the system. Regular maintenance and timely checks can help prevent such issues from arising in the future. Always make sure to follow safety guidelines when handling refrigeration systems.
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