Toshiba Q9 Plus ASD Quick Start Manual page 83

LED
Screen
*DC Over-Volts
*OP
*DC Under-Volts
*POFF
Emergency Off
E
Heavy Load
HLD
LLD
Lower Limit
LLT
Main Under-Volts
MOFF
Motor Overload
OLM
* Reset ignored if active.
Q9 Plus ASD Quick Start Guide
Table 10. Alarms. (Continued)
LCD
Alarm Description
Screen
DC Bus Voltage Exceeds
Specifications.
Under-Voltage Condition
at the 5, 15, or the 24
VDC supply.
Emergency Off.
Motor/ASD Over Loaded.
Light Load.
Light Load
Lower-Limit Time.
Under-Voltage (main
circuit power supply).
Motor Overload.
Possible Cause
• ASD is attempting to start into a spinning
motor after a momentary power loss.
• Incoming commercial power voltage level is
above the specified range.
• Deceleration time is too short.
• Voltage spikes at the 3-phase input; install
inductive filter.
• Over-Voltage Stall feature is turned off.
• System is regenerating.
• Load fluctuations.
• Defective control board.
• Excessive load on power supply.
• Low input voltage.
• Stop-Reset was pressed twice at the EOI.
• E-OFF command was received remotely.
• Acceleration time is too short.
• ASD is improperly matched to the application.
• Excessive load.
• ASD is improperly matched to the application.
• Parameter F256 adjustment is required.
• 3-phase input voltage is low.
• Defective control board.
• Excessive load on power supply.
• Under-Voltage/Ridethrough settings require
adjustment.
• V/f setting requires adjustment.
• Motor is locked.
• Continuous operation at low speed.
• Motor is improperly matched to the load.
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