TROUBLE SHOOTING GUIDE (CONT.)
12
1
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 your dealer.
Motor Will Not
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.
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.
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 new motor.
