BENSHAW RSi SG Series, Instruction Manual

Page: 178 / 218

Chapter 7 – Trouble Shooting & Maintenance
7-6
7.3 Troubleshooting
Condition Item to Check
The Motor Does
Not Rotate.
1) Main circuit inspection:
- Is the input (line) voltage normal? (Is the LED in the drive lit?)
- Is the motor connected correctly?
2) Input signal inspection:
- Check the operating signal input to the drive.
- Check the forward and the reverse signal input to the drive?
- Check the command frequency signal input to the drive.
3) Parameter setting inspection:
- Is the reverse prevention (FUN-01) function set?
- Is the Drive mode (DRV-03) set correctly?
- Is the command frequency set to 0Hz?
4) Load inspection:
- Is the load too large or is the motor jammed? (Mechanical brake)
5) Other:
- Is an alarm or fault displayed on the keypad or is the alarm LED lit? (STOP LED blinks)
The Motor
Rotates in
Opposite
Directions. - Is the phase sequence of the output terminals U, V, W correct?
- Is the starting signal (forward/reverse) connected correctly?
The Difference
Between the
Rotating Speed
and the Reference
is too Large. - Is the frequency reference signal correct? (Check the level of the input signal)
- Are the following parameter settings correct?
Lower Limit Frequency (FUN-34), Upper Limit Frequency (FUN-35),
Analog Frequency Gain (I/O-1~10)
- Is the input signal line influenced by external noise or ground loops? (Use a shielded wire)
The Drive Does
Not Accelerate or
Decelerate
Smoothly. - Is the acceleration/deceleration time is set too short a period of time?
- Is the load too large?
- Is the Torque Boost (AFN-68, 69) value is too high that the current limit function and the stall
prevention function do not operate properly?
The Motor
Current is Too
High.
- Is the load too large?
- Is the Torque Boost Value (manual) too high?
- Is the motor rated voltage parameter set correctly?
- Is the input voltage low?
The Rotating
Speed Does Not
Increase.
- Is the Upper Limit Frequency (FUN-35) value correct?
- Is the load too large?
- Is the Torque Boost (FUN-68, 69) value too high that the stall prevention function (FUN-70, 71)
does not operate correctly?
The Rotating
Speed Oscillates
When the Drive is
Operating.
1) Load inspection:
- Is the load really oscillating?
2) Input signal inspection:
- Is the frequency reference signal oscillating or being disturbed by noise?
3) Other:
- Is the wiring too long when the drive is utilizing V/F control? (over 500m)