across 14 chapters. These "fixes" address errors in practice problem answers, missing units, and typographical mistakes in circuit equations and figures.
| Problem | Likely Causes | Book Sections to Consult | |---|---|---| | Motor fails to start | Open control circuit, failed contactor coil, blown fuse | Contactors and Magnetic Motor Starters; Control Logic | | Motor starts but trips overload | Overload relay set incorrectly, excessive load, single‑phasing | Motor Load, Torque, and Power Quality Requirements | | Motor runs in wrong direction | Incorrect phase sequencing (three‑phase) | Reversing Motors; AC Motors | | Contactor chatters | Low control voltage, dirty or pitted contacts | Contactors and Magnetic Motor Starters; Test Instruments | | Motor runs intermittently | Loose connections, failing control relay, thermal overload cycling | Preventive Maintenance Systems; Predictive Maintenance | | PLC not responding to inputs | Sensor failure, wiring error, program logic issue | Programmable Controllers; Semiconductor Input Devices |
Electrical Motor Controls for Integrated Systems - Google Books across 14 chapters
Tighten all power lugs on the load side of the contactor and the overload block to the torque specifications listed in the manual. Loose connections create heat that mimics a motor overload.
Ensure the overload heater sizes or digital dial settings match the motor's actual FLA and service factor. How to Fix Loose connections create heat that mimics a motor overload
Integrated systems frequently suffer from Electromagnetic Interference (EMI), where the high-frequency switching of the VFD's inverter section corrupts nearby 4-20mA analog control signals or PLC communication lines.
If you are looking for troubleshooting or maintenance "fixes" within the textbook's content, the 5th edition specifically includes: Integrated Troubleshooting If you are looking for troubleshooting or maintenance
If winding resistance is unbalanced or shorted to ground, the motor must be replaced or sent to a repair shop. 2. Resolving Control Circuit and Contactor Issues
Carries high voltage and high current directly to the motor. It includes circuit breakers, fuses, disconnection switches, starter contacts, and the motor itself.