254 H9 ASD Installation and Operation Manual
OL1 ASD Overload • Accelerat io n ti m e is too shor t.
• DC Injection current is too high.
• Improper V/f setting.
• Motor running during restart.
• ASD or th e motor is improperly m atched to the applicati on.
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
• Decelerat io n ti m e is too sh or t.
• DBR setting adjustment required.
• Overvoltage Stall setting adjustment required.
OP1 Overvoltage During
Acceleration • Motor running during restart.
OP2 Overvoltage During
Deceleration
• Decelerat io n ti m e is too sh or t.
• 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 Overvoltage During
Run
• Load fluctuations.
• 3-Phase input voltage out of specification.
• DBR required (DBR setup required).
OT Overtorque • A torque r equirement by the load in excess of th e 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
Undervoltage
• Input 3-phase voltage is too low.
• Momentary power failure longer than the time setting of F628.
UP2 Control Power
Undervoltage
• This fault is caused by an undervoltage condition at the 5, 15, or the 24 VDC
supply.
• 3-phase input voltage low.
LED Display LCD Display Possible Causes