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Quality Bulletin: Fan Noise and Cooling Issues in FF Models Post-Deployment

This bulletin addresses the fan noise and cooling issues observed in Horizontal Deployment FF Models as of May 29, 2013. The primary cause identified was misalignment of the fan blades with the motor due to transportation impacts, leading to contact with the frame and operational noise. Quality Assurance improvements, including the addition of a rubber washer between the motor and clamp assembly, have been implemented to mitigate these issues. Refer to the attached test reports for detailed improvements and adjustments based on the latest quality system enhancements.

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Quality Bulletin: Fan Noise and Cooling Issues in FF Models Post-Deployment

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  1. Quality Bulletin A.D.pandey O.P..Singh Naresh Pant Horizontal deployment Running model New model Re-FPA New part approval Prepared CKD App Model S/No. Product Claim section Claim date Date of imp Kas/Ref05/ 13/45 All FF Model Continuous 29thMay13 REF Field issue Quality issue Cause Implemented serial No • Fan noise.No cooling issue in FF due to fan blade touch with frame caused movement stuck , 3 star models, All FF Model ( 3 star) Analysis Why? Play in motor Fan Motor and clamp fixing l Why? In Transportation , Fan blade motor position misalign in some pcs, due to heavy jerk caused fan stuck/noise • Videocon/Kelvinator • 29th May’13 onwards Before QA System Improved QA System References PATD / ICTS / Test Std. / IG control no. • Improvement in System One rubber washer added between motor and clamp aasy to eliminate play ECN No. JIR control no. Others ( Refer test Report of PATD. & BOm change )

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