Which is not a proper EIS maintenance procedure?

Which is not a proper EIS maintenance procedure?

• A. Cleaning the fan cover with soap and water.
• B. Washing the fan filter with soapy water.
• C. Replacing worn hoses.
• D. Checking electrical connectors.

Answer: (B)

Washing a fan filter with soapy water isn’t a proper maintenance step because the filter is not designed to be cleaned with liquids. Soapy water can saturate and degrade the filter media, reducing its effectiveness at trapping debris, and it can leave residues or cause moisture to reach nearby electrical components, potentially leading to faults. In contrast, exterior parts like the fan cover can be cleaned with soap and water, worn hoses should be replaced to prevent leaks, and electrical connectors should be checked to ensure solid, reliable connections. The filter is typically treated as a replaceable part rather than a washable one.

Washing a fan filter with soapy water isn’t a proper maintenance step because the filter is not designed to be cleaned with liquids. Soapy water can saturate and degrade the filter media, reducing its effectiveness at trapping debris, and it can leave residues or cause moisture to reach nearby electrical components, potentially leading to faults. In contrast, exterior parts like the fan cover can be cleaned with soap and water, worn hoses should be replaced to prevent leaks, and electrical connectors should be checked to ensure solid, reliable connections. The filter is typically treated as a replaceable part rather than a washable one.