Справочник Пользователя для Toshiba W7
148
W7 ASD Installation and Operation Manual
*OLI
ASD Overload
Load requirement in excess of
the capability of the ASD.
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.
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
Overload
Excessive current at the
Dynamic Braking Resistor.
Dynamic Braking Resistor.
• Deceleration time is too short.
• DBR configuration improperly set.
*OP
Overvoltage
DC bus voltage exceeds
specifications.
specifications.
• ASD attempting to start into a spinning motor after a
momentary power loss.
• Incoming utility 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 (
).
OT
Overtorque
Torque requirement in excess of
the setting of parameter
the setting of parameter
or
for a time longer than the
setting of parameter
• ASD is not correctly matched to the application.
• Parameter
setting is too low.
• Obstructed load.
*POFF
Control
Undervoltage
Undervoltage
Undervoltage condition at the 5,
15, or the 24 VDC supply.
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.
setpoint values are too close to
each other.
• Two speed reference frequency setpoints are too close to
each other (increase the difference).
UC
Undercurrent
and remains
there for the time set at
parameter
parameter
.
* Reset ignored if active.
EOI
Display
Function
Description
Possible Causes