43
Motor runs too fast.
Motor will not reach the
desired speed.
Motor pulsates or
surges under load.
Motor makes a
humming or buzzing
noise.
1. MAX SPD not
calibrated.
1. MAX SPD setting is
too low.
2. IR COMP setting is
too low.
3. Motor is overloaded.
1. IR COMP is set too
high.
2. Motor bouncing in
and out of current
limit.
1. Line frequency
switch is set for
wrong frequency.
1. Calibrate MAX SPD.
1. Increase MAX SPD
setting.
2. Increase IR COMP
setting.
3. Check motor load.
Resize the motor and
drive if necessary.
1. Adjust the IR COMP
setting slightly CCW
until the motor speed
stabilizes.
2. Make sure motor is
not undersized for
load; adjust
FORWARD
TORQUE and
REVERSE TORQUE
trimpot CW.
1. Set line frequency
switch for correct
frequency.
Problem
Possible
Causes
Suggested
Solutions
Troubleshooting
Summary of Contents for MMRG Series
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