Yaskawa E7B Drive Bypass - Manual (Page 181)

Diagnostic & Troubleshooting 6 - 1
Chapter 6
Diagnostics & Troubleshooting
This chapter describes diagnostics and troubleshooting for the Drive and Bypass.
Bypass Diagnostics ........................................................................ 2
Troubleshooting the Bypass Printed Circuit Boards .................. 2
Drive Diagnostics ........................................................................... 3
Fault Detection .......................................................................... 4
Alarm Detection ....................................................................... 11
Operator Programming Errors (OPE) ...................................... 14
Auto-Tuning Faults .................................................................. 15
Digital Operator COPY Function Faults ................................... 16
Drive Troubleshooting .................................................................. 17
If Parameter Cannot Be Set .................................................... 17
If the Motor Does Not Operate ................................................ 18
The Direction of the Motor Rotation is Reversed ..................... 19
If the Motor Does Not Put Out Torque or
If Acceleration is Slow ............................................................. 19
If the Motor Operates at a Higher Speed
Than the Speed Command ...................................................... 19
If the Motor Overheats ............................................................. 20
If Peripheral Devices Like PLCs or Others are Influenced by
Starting or Running Drive ......................................................... 20
If the Ground Fault Interrupter Operates When
the Drive is Run ....................................................................... 21
If There is Mechanical Vibration .............................................. 21
If the Motor Rotates Even When Drive Output is Stopped ....... 22
If Zero Volts is Detected When a Motor is Started, or Stalls .... 22
If the Accepted Speed Command Does Not Rise to the User
Speed Command Input............................................................. 22
Drive Main Circuit Test Procedure ................................................ 23
Drive Date Stamp Information ...................................................... 27