Toshiba HX7+ ASD, Installation & Operation Manual

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198 HX7+ ASD Installation and Operation Manual
*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.
OLM Motor Overload Load requirement in excess of
the capability of the motor. • V/f parameter improperly set.
• Motor is locked.
• Continuous operation at low speed.
• The load is in excess of what the motor can deliver.
*OLR Resistor
Overload Excessive current at the
Dynamic Braking Resistor .
• Deceleration time is too short.
• DBR configuration improperly set.
*OP Overvoltage 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.
• Overvoltage Stall feature is turned off.
• System is regenerating.
• Load instability.
• Disable the Ridethrough function ( F302 ).
OT Overtorque Torque requirement 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.
*POFF Control
Undervoltage Undervoltage condition at the 5,
15, or the 24 VDC supply. • Defective Control board.
• Excessive load on power supply.
• Low input voltage.
PtSt Reference Point Two speed-reference frequency
setpoint values are too close to
each other. • Two speed reference frequency setpoints are too close to
each other (increase the difference).
UC Undercurrent Output current of the ASD is
below the level defined at
F611
and remains there for the time
set at
F612 .
* Reset ignored if active.
Keypad
Display
Function Description Possible Causes