252 H9 ASD Installation and Operation Manual
OL1 ASD Overload • Acceleration time is too short.
• DC Injection current is too high.
• Improper V/f setting.
• Motor running during restart.
• ASD or the motor is improperly matched to the application.
OL2 Motor Overload • Improper V/f setting.
•Motor is locked.
• Continuous operation at low speed.
• Load requirement exceeds ability of the motor.
• Startup frequency setting adjustment required.
OLR Dynamic Braking
Resistor Overload
• Deceleration time is too short.
• DBR setting adjustment required.
• Over-Voltage Stall setting adjustment required.
OP1 Over-Voltage During
Acceleration
• Motor running during restart.
OP2 Over-Voltage During
Deceleration
• Deceleration time is too short.
• DBR value is too high.
• DBR required (DBR setup required).
• Stall protection is disabled.
• 3-phase input voltage is out of specification.
• Input reactance required.
OP3 Over-Voltage During
Run
• Load fluctuations.
• 3-Phase input voltage out of specification.
• DBR required (DBR setup required).
OT Over-Torque • A torque requirement by the load in excess of the setting of F616 or F617 for
a time longer than the setting of F618.
• The ASD is improperly matched to the application.
• The load is obstructed.
SOUT
Step-Out
(for PM Motor Only)
• Motor shaft is locked.
• Output phase is open.
• Operating a reciprocating load.
UP1
Main Power
Under-Voltage
• Input 3-phase voltage is too low.
• Momentary power failure longer than the time setting of F628.
UP2 Control Power
Under-Voltage
• This fault is caused by an under-voltage condition at the 5, 15, or the 24 VDC
supply.
• 3-phase input voltage low.
LED Screen LCD Screen Possible Causes
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