SYMPTOM
POSSIBLE CAUSE
CORRECTIVE ACTION
MOTOR WILL NOT
Improper speed command.
Verify control is receiving proper command
START
signal at input terminal strip.
Incorrect COMMAND SELECT parameter.
Match COMMAND SELECT parameter with
user interface.
MAX OUTPUT SPEED parameter set to 0.
Check MAX OUTPUT SPEED parameter.
Not enough starting torque.
Increase CURRENT LIMIT setting.
Motor overloaded.
Check couplings for binding.
Check for proper motor loading.
Verify sizing of motor and control for application.
MOTOR WILL NOT
MAX OUTPUT SPEED parameter set too
Reprogram MAX OUTPUT SPEED parameter.
REACH MAXIMUM
low.
SPEED
Improper speed command.
Verify control is receiving proper speed command
at input terminals.
Verify control set to proper operating mode to
receive speed command.
Motor overloaded.
Check motor for free rotation.
Speed potentiometer failure.
Replace potentiometer.
MOTOR WILL NOT
MIN OUTPUT SPEED parameter set too
Check MIN OUTPUT SPEED parameter.
STOP ROTATION
high.
Improper speed command.
Verify control is receiving proper speed command
at input terminals.
Verify control set to proper operating mode to
receive speed command.
Speed potentiometer failure.
Replace potentiometer.
NEW BASE ID
Software parameters not initialized on
Push RESET to initialize parameters and retry.
newly installed control board.
Contact factory if fault remains.
NO DISPLAY
Incorrect display contrast setting.
Adjust display contrast. Refer to Section 3-
Adjusting Display Contrast.
Loose Connections.
Check keypad to control board connection.
Check input power connections.
Lack of input voltage.
Check input power for proper voltage.
NO EXB INSTALLED
Incorrect mode of operation programmed.
Change OPERATING MODE parameter to one
which does not require expansion board.
Need expansion board.
Install correct optional expansion board for mode
of operation selected.
Continued on next page...
4-9
DIAGNOSTIC INFO AND TROUBLESHOOTING
MN723H-10/95 11/28/95 1:14 AM Page 93 (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...