LEESON NEMA 4X SCR Control: 174107.00 - Manual (Page 43)

37 Troubleshooting SPEEDMASTER™ OPERATION MANUAL
Symptom Possible
Causes
Suggested
Solutions
Line fuse does not
blow or circuit
breaker does not
trip, but the motor
does not run (cont.)
Motor runs too fast
at maximum speed
setting
Motor runs too slow
or too fast
Motor will not reach
the desired speed.
3. Drive is in current
limit.
4. Drive is not receiving
AC line voltage.
5. Motor is not
connected.
1. MIN SPD and MAX
SPD settings are too
high.
1. MIN SPD and MAX
SPD are not
calibrated.
1. MAX SPD setting is
too low.
2. IR COMP setting is
too low.
3. Motor is overloaded.
3. Verify that the motor
is not jammed.
Increase TORQUE
setting (page 14).
4. Apply AC line
voltage to L1 and L2.
5. Connect motor to A1
and A2.
1. Recalibrate MIN
SPD (page 12) and
MAX SPD (page
13).
1. Recalibrate MIN
SPD (page 12) and
MAX SPD (page
13).
1. Increase MAX SPD
setting (page 13).
2. Increase IR COMP
setting (page 13).
3. Check motor load.
Resize the motor or
drive if necessary.