Black foreign substances scattered from the unit cooler! Introduction of a case where the trouble was successfully resolved.
We received a request to investigate the "black foreign substances" being dispersed from the unit cooler in the factory. 【Case】 ■Issue - We would like you to investigate the "black foreign substances" being dispersed from the unit cooler. ■Solution - Elemental analysis using "Scanning Electron Microscopy - Energy Dispersive X-ray (SEM-EDX)" - Analysis of organic materials using "Fourier Transform Infrared Spectroscopy" and comparison of the surface and cross-section of the foreign substances.
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The scattered foreign substances were subjected to elemental analysis using a "scanning electron microscope with energy-dispersive X-ray spectroscopy (SEM-EDX)." As a result, the main constituent elements were found to be carbon, oxygen, and calcium. Elemental analysis was also conducted on the EPDM used in the unit cooler that was brought back, and the same elements were detected with similar component ratios, leading to the inference that they are the same substance. Next, an analysis of organic materials was performed using "Fourier-transform infrared spectroscopy," and the spectra of the scattered foreign substances were found to be very similar to those of the comparison samples. Furthermore, a comparison of the surface and cross-section of the foreign substances revealed the same peak for calcium carbonate detected by SEM-EDX from the surface, while characteristic peaks of EPDM were obtained from the cross-section. Carbon compounds can undergo carbonization due to heat or aging, which may alter the spectrum from its original state, so observing the internal condition by cutting it open is crucial. From the above facts, the conclusion was reached that "the scattered black foreign substances are EPDM from the unit cooler that has deteriorated over time." As a result, the customer replaced the parts using EPDM, and thereafter, the scattering of foreign substances ceased, successfully resolving the issue.
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Air conditioning and sanitation equipment can experience various issues. Our company goes beyond being just a cleaning and analysis service provider; we scientifically investigate "why problems occur" to offer our customers new value. As a result, our goal is to expand the circle of joy and contribute to society. We engage in a wide range of businesses, including "investigating," "cleaning," and "protecting." To provide the best service tailored to our customers' situations, service engineers who have passed our ISO 9001 standards are responsible for execution in each field. Additionally, we are insured against unforeseen circumstances, ensuring that we have a system in place to provide our customers with stable quality services.