SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
OVERCURRENT FLT
CURRENT LIMIT parameter set too low.
Increase CURRENT LIMIT parameter setting.
Accel/Decel time(s) too short.
Increase ACCEL/DECEL parameter time(s).
Broken or misaligned encoder coupling.
Check encoder coupling: align or replace.
Encoder bearing failure.
Replace encoder and align during installation.
Excessive noise on resolver signals.
Check resolver connections. Separate resolver
leads from power leads. Cross power leads at
90°.
Electrical noise from external DC coils.
Install diodes on all external DC relay coils. See
manual, Opto-Isolated Outputs.
Electrical noise from external AC coils.
Install RC snubbers on all external AC coils.
Excessive load.
Verify sizing of motor and control for application.
OVERLOAD 3-SEC
Excessive current draw.
Change EXTERNAL TRIP parameter in level 2
FAULT
Protection Block to FOLDBACK instead of TRIP.
Increase time allowed for acceleration.
Reduce load.
OVERLOAD 1 MIN
Excessive current draw.
Change EXTERNAL TRIP parameter in Level 2
FAULT
Protection Block to foldback instead of
trip. Increase time allowed for acceleration and
deceleration.
Drive overloaded.
Verify sizing of motor and control for application.
OVERSPEED FLT
Motor exceeded 110% of programmed
Increase max speed parameter to match
max speed.
application requirement.
Increase SPEED PROPORTIONAL GAIN
parameter setting under BRUSHLESS CONTROL
programming block.
4-12 DIAGNOSTIC INFO AND TROUBLESHOOTING
MN723H-10/95 11/28/95 1:14 AM Page 96 (Black plate)
Summary of Contents for 23H Series
Page 11: ...1 8 GENERAL INFORMATION MN723H 10 95 11 28 95 1 07 AM Page 12 Black plate...
Page 83: ...3 30 KEYPAD PROGRAMMING AND OPERATION MN723H 10 95 11 28 95 1 13 AM Page 84 Black plate...
Page 99: ...4 16 DIAGNOSTIC INFO AND TROUBLESHOOTING MN723H 10 95 11 28 95 1 14 AM Page 100 Black plate...
Page 125: ...5 26 APPENDIX G MN723H 10 95 11 28 95 1 21 AM Page 126 Black plate...
Page 126: ...MN723H 10 95 11 28 95 1 21 AM Page 127 Black plate...