[1] High and low temperature test chambers are slow to cool down, how to deal with them?
[Answer] 1, the thermal load of the studio is too large, the fan does not turn, the door is not closed; 2, part of the solid state relay breakdown causes a part of the heating pipe to heat up, offsetting part of the cooling capacity, resulting in the illusion of slow cooling. 3. The test items in the test chamber are piled up too much, resulting in the wind not being able to circulate and the temperature fluctuations being large.
[2] When cooling in the summer, the external machine is connected to the pipe cap to drip water. Is it leaking fluorine?
[Answer] This is not leaking fluorine. During cooling, the inside of the steel pipe is a low-temperature refrigerant, which causes the temperature of the steel pipe to be low and condensation occurs (the outdoor temperature is high, the temperature inside the steel pipe is low, and there is dripping when the cold and heat meet). A normal phenomenon. For example, the beverage that has just been taken out of the refrigerator will be condensed on the bottle after a while, rather than the beverage in the bottle.
[3] High and low temperature test chambers are not cooled, what should I do?
[Answer] First observe whether the refrigeration compressor can be started during the operation of the test chamber. The compressor can be started during the operation of the high and low temperature test chamber, indicating that the electrical circuit from the main power supply to each compressor is normal, and there is no electrical system. problem. There is no problem with the electrical system and continue to check the refrigeration system. Firstly, the exhaust and suction pressures of the low-temperature (R23) compressors of the two groups of refrigeration units are lower than the normal values, and the suction pressure is evacuated, indicating that the refrigerant capacity of the main refrigeration unit is insufficient. Touching the exhaust and suction lines of the R23 compressor of the main unit by hand, it is found that the temperature of the exhaust line is not high, and the temperature of the suction line is not low (not frosted), which also explains the host group ( R23) Lack of refrigerant. If the fault is not determined, the cause of the fault should be further confirmed by combining the control process of the high and low temperature test chamber.
[4] In the summer cooling, the equipment alarm system always shows the compressor overpressure
[Answer] First confirm whether the ambient temperature of the test room is too high, whether there is air conditioning, whether the ventilation is normal, and the normal ambient temperature is preferably controlled (between 5 °C and 28 °C). And press the reset button of the overpressure protector. Another point is that if the condenser is used for a long time, the accumulated dust is too thick, and the dust on the condenser can be cleaned;
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