Section 1
General Information
Troubleshooting 5-7MN715
Table 5-3 Troubleshooting Continued
INDICATION POSSIBLE CAUSE CORRECTIVE ACTION
HW Desaturation Accel/Decel rate set too short.
Torque Boost set too high.
Electrical noise in logic circuits.
Motor overloaded.
Lengthen Accel/Decel rate.
Reduce torque boost value.
Check for proper grounding of power wiring and shielding of signal wiring.
Verify proper sizing of control and motor or reduce motor load.
HW Power
Supply Power supply malfunctioned. Check internal connections.
Replace logic power board.
HW Ground Fault Output current (motor current)
leakage to ground. Disconnect wiring between control and motor. Retry test.
If GND FLT is cleared, reconnect motor leads and retry the test. Repair
motor if internally shorted.
Replace motor lead wire with low capacitance cable.
If GND FLT remains, contact Baldor.
Invalid Base ID Control does not recognize hp and
Voltage configuration. Press “RESET” key on keypad. If fault remains access ”Diagnostic Info”
and compare reported ID number with Table 5-2. If different, call Baldor.
Line REGEN Fault in Line REGEN Converter Series 21H Line REGEN Inverter only.
Motor Will Not Not enough starting torque. Increase Current Limit setting.
Start Motor overloaded. Check for proper motor loading.
Check couplings for binding.
Verify proper sizing of control and motor.
Motor may be commanded to run
below minimum frequency setting. Increase speed command or lower minimum frequency setting.
Incorrect Command Select
parameter. Change Command Select parameter to match wiring at J4.
Incorrect frequency command. Verify control is receiving proper command signal at J4.
Motor Will Not Max Frequency Limit set too low. Adjust Max Frequency Limit parameter value.
Reach Maximum
Speed Motor overloaded. Check for mechanical overload. If unloaded motor shaft does not rotate
freely, check motor bearings.
Improper speed command. Verify control is receiving proper command signal at input terminals.
Verify control is set to proper operating mode to receive your speed
command.
Speed potentiometer failure. Replace potentiometer.
Motor Will Not
Stop Rotation MIN Output Speed parameter set
too high. Adjust MIN Output Speed parameter value.
Improper speed command. Verify control is receiving proper command signal at input terminals.
Verify control is set to receive your speed command.
Speed potentiometer failure. Replace potentiometer.
Motor runs rough Torque boost set too high. Adjust torque boost parameter value.
at low speed Misalignment of coupling. Check motor/load coupling alignment.
Faulty motor. Replace with a Baldor Motor.