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LED
Screen
Screen
*OP
*DC Over-Volts
*POFF
*DC Under-Volts
E
Emergency Off
HLD
Heavy Load
LLD
Light Load
LLT
Lower Limit
MOFF
Main Under-Volts
OLM
Motor Overload
* Reset ignored if active.
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Table 18. Alarms (Continued)
LCD
Alarm Description
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.
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 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.
Q9 Plus ASD Installation and Operation Manual
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