Functional Errors - Unitek Classic Q1 Series Manual

Troubleshooting
6.2

Functional errors

Functional errors
Error
Motor is not running
Motor is running at high
speed
Motor is not running
smoothly
Motor has no torque
Classic Q1
Cause
Incorrect mains supply connection or motor connection
Fuses are tripped
Missing enable or command value
Current limit too low
Missing BTB
Wrong polarity of the actual value (tacho armature voltage)
Values of the tacho switch S9 too low
Command value too high
for armature voltage control
Field current too low
The fuse of the armature voltage feedback are tripped
Mechanical tacho failure
Tacho fault
Speed controller amplification too high or too low
Incorrect PID parameter
Command value fault
Current controller amplification too high or too low
-Current limits to low
-Field current too low/motor demagnetized
-Mechanical overload of the drive
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