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Alarms, Trips, and Troubleshooting
Q9 Plus ASD Install/Op Manual
LED
LCD
Screen
Screen
*ASD Overload
*OL1
Motor Overload
OLM
Soft Stall
OLST
*DC Over-Volts
*OP
Over-Torque
OT
*DC Under-Volts
*POFF
Thermal Err
PTC
Under-Current
UC
266
Table 17. Alarms. (Continued)
Alarm Description
• Carrier frequency is too high.
• Excessive load.
• Acceleration time is too short.
Load Requirement in
Excess of the Capability of
• DC damping rate is too high.
the ASD.
• Motor is starting into a spinning load after a
• ASD is improperly matched to the application.
• V/f setting requires adjustment.
• Motor is locked.
Motor Overload.
• Continuous operation at low speed.
• Motor is improperly matched to the load.
• Soft Stall selection adjustment is required
Overload soft stall active.
• ASD is attempting to start into a spinning motor
• Incoming commercial power voltage level is
• Deceleration time is too short.
DC Bus Voltage Exceeds
• Voltage spikes at the 3-phase input; install
Specifications.
• Over-Voltage Stall feature is turned off.
• System is regenerating.
• Load fluctuations.
• Normal when Automatic Accel/Decel active.
Torque requirement in
• ASD is improperly matched to the application.
excess of the setting of
F616
or
F617
for a time
• Parameter
longer than the setting of
• Obstructed load.
F618.
• Defective control board.
Under-Voltage Condition
at the 5, 15, or the 24
• Excessive load on power supply.
VDC supply.
• Low input voltage.
Option thermal sensor
• User-set thermal threshold setting of
threshold exceeded.
• Disable detection at F610.
Output current of the ASD
• Parameter
is below the level defined
at F611.
• Motor not connected.
Possible Cause
momentary power failure.
(F017).
after a momentary power loss.
above the specified range.
inductive filter.
F616
or
F617
setting is too low.
exceeded.
F611
adjustment is required.
https://www.toshiba.com/tic/
F646
is
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