After a difficult selection, the user finally purchased a high-low temperature alternating heat and humidity test chamber. However, when he started to use it, he still encountered various problems. What should be done? Regarding the solution to the low temperature instability of the high and low temperature alternating heat and humidity test chamber, I hope to help everyone.
Fault determination: 1. First observe whether the high and low temperature alternating heat and humidity test chamber refrigeration compressor can be started during the operation of the test chamber. If the compressor of the high and low temperature alternating heat and humidity test chamber can be started during operation, it indicates from the main power supply to The electrical circuits of the high and low temperature box compressors are all normal, and the electrical system is no problem.
2. When there is no problem in the electrical system of the high and low temperature alternating heat and humidity test chamber, continue to check the refrigeration system. First check the two sets of refrigeration compressors in the test chamber. If the exhaust and suction pressures of the low-temperature (R23) compressor are lower than the normal value, and the suction pressure is evacuated, this indicates the refrigerant of the main refrigeration unit. Obviously insufficient. Then touch the compressor exhaust and suction line of the host group R23 by hand. If the temperature of the exhaust line is not high, the temperature of the suction line is not low (no frost), which also shows the host. The lack of R23 refrigerant in the group.
So how should this kind of failure phenomenon be solved? First, the refrigeration system of the high and low temperature alternating heat and humidity test chamber should be checked for leaks. The leak detector and soapy water should be combined to check where the leak is. If it is found to be hot. If the valve stem of the bypass solenoid valve is cracked and has a slit, replace the solenoid valve. If it is found in other places, use oxygen welding to repair the leak at the leak, and then refill the system to restore normal.
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