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LED
Screen
Screen
OC
Over-Current
*OH
*Over-Heat
OT
Over-Torque
LTA
Part Replace
OJ
Run-Time Counter
OLST
Soft Stall
PTC
Thermal Err
* Reset ignored if active.
Q9 Plus ASD Installation and Operation Manual
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Table 18. Alarms (Continued)
LCD
Alarm Description
ASD Output Current
Greater than
Over-Heating.
Torque Requirement in
Excess of the Setting of
F616
or
F617
Longer than the Setting
of F618.
Part Replacement Alarm.
User-Set Run-Time
Counter Exceeded.
Overload Soft Stall
Active.
Option Thermal Sensor
Threshold Exceeded.
• Phase-to-phase short (U/T1, V/T2, or W/T3).
• Defective IGBT (U/T1, V/T2, or W/T3).
• ASD output to the motor is connected
incorrectly.
• ASD is attempting to start into a spinning
motor after a momentary power loss.
• Motor/machine is jammed.
• Mechanical brake engaged while the ASD is
starting or while running.
• Acceleration/deceleration time is too short.
F601
Setting.
• Voltage Boost setting is too high.
• V/f setting adjustment is required.
• Load fluctuations.
• ASD is operating at an elevated temperature.
• ASD/Motor is improperly matched.
• ASD current exceeds 320% or 340% of the
rated FLA on ASDs that are greater than 100
HP or that are 100 HP or less, respectively,
during acceleration.
• ASD is operating at an elevated temperature.
• ASD is too close to heat-generating equipment.
• Cooling fan vent is obstructed.
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
• ASD is improperly matched to the application.
for a Time
• Parameter
• Obstructed load.
• Part Replacement Alarm at
• Type Reset is required; select Clear run timer.
• Soft Stall selection adjustment is required
(F017).
• User-set thermal threshold setting of
exceeded.
Possible Cause
F616
or
F617
setting is too low.
F634
timed out.
F646
is
249
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