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Text | C60 Fan Failures | 001 Capstone Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Telephone: (818) 734-5300 • Facsimile: (818) 734-5320 • Website: www.microturbine.com Service Bulletin SB0057 Date: From: Subject: July 2003 Capstone Technical Support C60 Fan Failures Systems Affected Model C60 MicroTurbine systems containing ECM/LCM or BCM assemblies with 511540-200 fan inverters and 510537-200 and –300 fan assemblies with date codes 33/01 and 34/01. BCM and ECM/LCM fan assemblies that incorporate sine wave filters (512580-001) are exempt from this Bulletin. Model C60 MicroTurbines that may be affected are S/N’s: 1904, 1923, 1927, 2047, 2048, 2219, 2260, 2266 and 2286 through 2797 (Nov ’01 – May ’03). Description of Problem BCM and ECM/LCM fan and inverter failures have been observed recently in some Model C60 systems. The failures have been linked to two vendor shipments of fans manufactured using inferior fan winding insulation. Failures in the field have also been caused by faulty or partially damaged fan inverters, which control fan operation. ECM and LCM fans utilize a single fan inverter (511540-200), located in the ECM assembly, to power both the ECM and LCM fans (510537-300). The BCM fans utilize a single fan inverter (511540-200) to power the BCM fan (510537-300). If a fan has stopped operating (non-spinning), operators should remove the side panels and visually inspect the BCM and ECM/LCM assemblies for fan inverter damage (cracking, burns). A fan failure warning code (9015 GDSP FAN FAIL) is one indication of a possible fan and/or fan inverter failure. Recommended Action Fielded units that have experienced one or more failures shall be upgraded immediately to avoid further failures. For ECM and/or LCM failures, replace both ECM and LCM fans and the inverter assembly with fan inverter upgrade kit 610067-100. For BCM failures, replace the BCM fan and inverter assembly with fan inverter upgrade kit 610066-100. Units stored in distributor inventory shall have fan inverter upgrade kits installed for the ECM/LCM (610067-100) and BCM (610066-100, when applicable) prior to commissioning. Fan inverter upgrade kits contain the following: fan inverter board 511540-300, fan cable 512462-100, ECM/LCM filter 515827-100 or BCM filter 515828-100, and associated hardware (wire tie, lock washer/nut, cable tie, tie wrap mount). 450022-001 Rev C (October 2003) Page 1 of 2 SB0057 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.

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