226 GX9 ASD Installation and Operation Manual
*OH *Over-Heat ASD ambient temperature
excessive.
• ASD is operating at an elevated temperature.
• ASD is too close to heat-generating equipment.
• Cooling fan vent is obstructed (see Mounting the
ASD on pg. 16).
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
OJ Cumulative Run Timer Run-time counter exceeded. • Type Reset required; select Clear run timer.
OL2 Motor Overload Load requirement exceeds the
ability of the motor.
• Improper V/f setting.
• Motor is locked.
• Continuous operation at low speed.
• Startup frequency setting adjustment required.
*OLI *ASD Overload Load requirement in excess of
the capability of the ASD.
• The carrier frequency is too high.
• An excessive load.
• Acceleration time is too short.
• DC damping rate is set too high.
• The motor is starting into a spinning load after a
momentary power failure.
• The ASD is improperly matched to the
application.
*OLR *Braking Resistor
Overload
Excessive current at the
Dynamic Braking Resistor.
• Deceleration time is too short.
• DBR configuration improperly set.
*OP *Over-Voltage DC bus voltage exceeds
specifications.
• ASD attempting to start into a spinning motor
after a momentary power loss.
• Incoming commercial power is above the
specified range.
• Decel time is too short.
• Voltage spikes at the 3-phase input; install
inductive filter.
• DBR required.
• DBR resistance value is too high.
• DBR function is turned off.
• Over-Voltage Stall feature is turned off.
• System is regenerating.
• Load instability.
• Disable the Ridethrough function (F302).
OT Excessive Torque Torque requirement is in excess
of the setting of F616 or F617
for a time longer than the setting
of F618.
• ASD is not correctly matched to the application.
• F616 or F617 setting is too low.
• Obstructed load.
* Reset ignored if active.
LED
Screen
LCD
Screen
Description
Possible Causes/
Troubleshooting
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