Advanced Troubleshooting - Johnson Controls Penn VFD68D Series Technical Bulletin

Advanced Troubleshooting

Use the following tables to resolve problems with the VFD68 drive.
Table 69: Symptoms and Resolutions
Symptom
Motor Does Not Start
Motor or Machine Makes Generates Acoustic Noise
VFD Generates Abnormal Acoustic Noise
Motor Generates Heat Abnormally
Motor Rotates in the Opposite Direction
Speed Greatly Differs from the Setting
Acceleration/Deceleration Is Not Smooth
Speed Varies During Operation
Operation Mode Cannot Be Changed
Operation Panel Display Does Not Operate
Motor Current is Too Large
Unable to Write Parameter Setting
VFD68 Variable Frequency Drives
71
Resolution Table
Table 70 on page 72
Table 71 on page 73
Table 72 on page 73
Table 73 on page 73
Table 74 on page 73
Table 75 on page 74
Table 76 on page 74
Table 77 on page 74
Table 78 on page 74
Table 79 on page 74
Table 80 on page 75
Table 81 on page 75