40
Symptom
Possible
Causes
Suggested
Solutions
Motor pulsates or
surges under load
1. IR COMP is set too
high.
2. Control is in current
limit mode.
1. Adjust the IR COMP
setting slightly CCW until
the motor speed stabilizes
(page 25).
2. Check that motor is of
sufficient horsepower and
amperage.
250-0089r3_readers_spreads.qxd 7/3/01 10:48 AM Page 40