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b. Set the Digital Multimeter to measure resistance. For each phase, measure resistance from DC+ and DC- to AC output. You should get four reading for each phase. Each reading should be greater than 70 K ohms. i. For A phase, measure resistance as follows: • Set Meter+ to DC+ A phase, and Meter– to A inductor. • Set Meter+ to DC- A phase, and Meter– to A Inductor. • Set Meter- to DC+ A phase, and Meter+ to A inductor. • Set Meter- to DC- A phase, and Meter+ to A inductor. ii. Repeat resistance test for phases B and C, and Neutral. Note that: A phase IGBT goes with A phase inductor. B phase IGBT goes with B phase inductor. C phase IGBT goes with C phase inductor. N IGBT goes with Neutral inductor. For a Dual Mode system, there will be Neutral IGBT. Repeat all the above IGBT diode and resistance tests for the dual Mode system. 7. Power Board a. Make sure that the Digital Multimeter is a Fluke 87 or equivalent. With the DMM in resistance mode: i. Check fuses F1 and F2. They should both read short. ii. Check the torque at the connections between the Power Board and the IGBT. It should be 45 lb-in. iii. Check capacitors C1, C2, C3, and C4 for shorts across the (+) and (–) terminals - they should read Kilo or Mega ohms. iv. Check capacitors C1, C2, C3, and C4 for shorts to ground, i.e., (+) terminal to chassis ground, and (-) terminal to chassis ground - both should read open. v. Remove the Power Board form the Chassis. Visually, check the capacitors for signs of leaks. If the they have a short or are leaking, replace them. vi Replace the capacitors on the Power Board. Tighten to a torque value of 30 lb-in. vii. Check the torque between the capacitors and the heat transfer elements - it should be 70 lb-in. Observe Safety Precautions - Refer to Safety Instructions for Details 430013-001 Rev C (July 2003) 1-9 Model C60 Troubleshooting Guide 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.PDF Image | Table of Contents for Series Fault Codes
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