Constant temperature and humidity box does not cool down

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Yesterday I received a call from a customer in Shandong: They bought the constant temperature and humidity box purchased in Shanghai last August and kept it unused. Today, when the power is turned on, the temperature drop is less than -40 degrees. I don’t know what to do, of course I First suggest customers, equipment purchase is still within the warranty period, it is best to contact a manufacturer first (because the constant temperature and humidity equipment warranty period is generally 1 year, has not passed the warranty period), but the customer responded that at the time of purchase due to the price Very low, according to no warranty, I heard this sentence, I must be careful when purchasing equipment, choose a regular manufacturer, the following analysis by Henan Yunfei Technology Development Co., Ltd. for the constant temperature and humidity box does not cool down:

Failure phenomenon:
1, the temperature does not cool or does not heat up
2, the humidity can not be lowered or not added
3, refrigerant leakage
4, the refrigeration system is blocked (capillary blockage)

cause of issue:
1, 1 heat is not good, install the appropriate power of air conditioning in the equipment field to cool down or open the door and window to allow air to circulate 2 refrigeration system blockage, find the plugging point, replace the dry filter, add the refrigerant marked by the compressor, re-commission 3 Condensing fan is damaged, replace the condenser fan
2, 1 heat is not good 2 compressor damage, replace the same type of compressor, (preferably the same brand)
3The overcurrent protector is abnormal, the overcurrent protection is damaged, or the debugging is not good, resulting in the current setting being reduced.

Solution:
1. The compressor is damaged or not opened, replace the compressor and check whether the compressor circuit and control components are damaged or not. 2 refrigerant leakage, use nitrogen leak detection method to find the leak point, weld, vacuum, add refrigerant, re Debug 3 solenoid valve abnormal operation, replace the solenoid valve, check the solenoid valve control line 4 capillary blockage, replace the capillary, replace the dry filter, purge the condensing system impurities with nitrogen, add refrigerant debugging 5 condenser icing, heat drying box Internal moisture, cooling
2, 1 heating tube is damaged (replaceable)
2 solid state relay is damaged, you can replace it
3, 1 humidification pipe damage, replacement can be 2 control humidification water level float ball does not float 3 humidification solid state relay damage

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