{"product_id":"vfd-faults-and-fixes-dovydas-kersys-9798189551581","title":"VFD Faults and Fixes: A Practical Guide to Diagnosing Variable Frequency Drive Faults, Parameters, Motors, Cables, and Electrical Noise","description":"\u003cp\u003eWhen a variable frequency drive trips, the fault code is only the beginning.\u003c\/p\u003e\u003cp\u003eAn overcurrent alarm does not automatically mean the drive is defective. An overvoltage trip may come from a rapid deceleration ramp. An undervoltage fault may begin at the incoming supply. Communication problems may be caused by grounding, shielding, wiring layout, or electrical noise rather than the network itself.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eVFD Faults and Fixes\u003c\/b\u003e is a practical guide for maintenance technicians, industrial electricians, engineers, and students who need to understand and troubleshoot variable frequency drives systematically.\u003c\/p\u003e\u003cp\u003eThe book explains how a VFD works before moving into fault diagnosis. You will learn how the rectifier, DC bus, inverter, PWM output, control system, and parameters work together-and how problems in each area appear as specific symptoms and fault codes.\u003c\/p\u003e\u003cp\u003eInside, you will learn how to: \u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eUnderstand what a VFD does and how it controls motor speed\u003c\/li\u003e\n\u003cli\u003eFollow power through the rectifier, DC bus, and inverter\u003c\/li\u003e\n\u003cli\u003eUnderstand pulse-width modulation and volts-per-hertz control\u003c\/li\u003e\n\u003cli\u003eIdentify the parameters that have the greatest effect on operation\u003c\/li\u003e\n\u003cli\u003eEnter and verify motor nameplate data\u003c\/li\u003e\n\u003cli\u003eConfigure speed references, limits, control modes, and ramp times\u003c\/li\u003e\n\u003cli\u003eRead fault histories, status values, and built-in diagnostics\u003c\/li\u003e\n\u003cli\u003eApply a repeatable troubleshooting method\u003c\/li\u003e\n\u003cli\u003eDiagnose overcurrent faults\u003c\/li\u003e\n\u003cli\u003eInvestigate DC-bus overvoltage and undervoltage\u003c\/li\u003e\n\u003cli\u003eFind the causes of overtemperature trips\u003c\/li\u003e\n\u003cli\u003eDiagnose ground faults, output faults, and motor overloads\u003c\/li\u003e\n\u003cli\u003eTroubleshoot communication, reference, encoder, and nuisance faults\u003c\/li\u003e\n\u003cli\u003eSeparate drive problems from motor, cable, supply, and load problems\u003c\/li\u003e\n\u003cli\u003eIdentify grounding, shielding, EMC, and electrical-noise issues\u003c\/li\u003e\n\u003cli\u003eInspect motor cables and connections\u003c\/li\u003e\n\u003cli\u003eUse preventive maintenance to reduce unexpected failures\u003c\/li\u003e\n\u003cli\u003eWork safely around stored DC-bus energy\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003eThe book emphasizes an important principle: \u003cb\u003ea VFD fault code identifies what the drive detected, but not necessarily what caused it\u003c\/b\u003e.\u003c\/p\u003e\u003cp\u003eThe actual cause may be: \u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eAn incorrect parameter\u003c\/li\u003e\n\u003cli\u003eA ramp time that is too aggressive\u003c\/li\u003e\n\u003cli\u003eA failing motor or damaged cable\u003c\/li\u003e\n\u003cli\u003eA mechanical overload\u003c\/li\u003e\n\u003cli\u003ePoor grounding or shielding\u003c\/li\u003e\n\u003cli\u003eAn unstable power supply\u003c\/li\u003e\n\u003cli\u003eInadequate cooling\u003c\/li\u003e\n\u003cli\u003eA loose electrical connection\u003c\/li\u003e\n\u003cli\u003eElectrical noise affecting control or communications\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003ePractical examples show how to move from the displayed fault to the real cause without replacing parts unnecessarily. The book also explains why installation quality matters so much, including motor-cable selection, grounding, shielding, separation of power and control wiring, and proper cooling.\u003c\/p\u003e\u003cp\u003eWritten with awareness of both \u003cb\u003eNEC and IEC practices\u003c\/b\u003e, this guide is suitable for technicians working with North American and international industrial equipment.\u003c\/p\u003e\u003cp\u003eWhether you are commissioning a new drive, diagnosing repeated trips, or maintaining an existing VFD system, this book will help you approach faults safely, logically, and confidently.\u003c\/p\u003e\u003cp\u003e\u003cb\u003eRead the code. Understand the system. Find the cause.\u003c\/b\u003e\u003c\/p\u003e\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Dovydas Kersys\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9798189551581\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Independently Published\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 07\/28\/2026\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 82\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.47lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 11.00h x 8.50w x 0.17d","brand":"Dovydas Kersys","offers":[{"title":"Paperback","offer_id":50666022240511,"sku":"9798189551581","price":19.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/www.whiterainbookhouse.com\/products\/vfd-faults-and-fixes-dovydas-kersys-9798189551581","provider":"WR Book House","version":"1.0","type":"link"}