Toshiba WX9 ASD, Installation & Operation Manual

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190 WX9 ASD Installation and Operation Manual
OC
Over-Current
ASD output current
greater than the
F601
setting.
• Defective IGBT (U, V, or W).
• ASD output to the motor is connected incorrectly. Disconnect
the motor and retry.
• ASD output phase-to-phase short.
• The ASD is starting into a spinning motor.
• Motor/machine is jammed.
• Mechanical brake is engaged while the ASD is starting or
while running.
• Acc/Dec time is too short.
• Voltage Boost setting is too high.
• Load fluctuations.
• ASD is operating at an elevated temperature.
*OH
*Over-Heat
ASD ambient temperature
excessive. • ASD is operating at an elevated temperature.
• ASD is too close to heat-generating equipment.
• Cooling fan vent is obstructed (see
Mounting the ASD on pg.
16 ).
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
OJ
Timer
Run-time counter
exceeded. • Type Reset is required; select Clear run timer .
*OL1
*ASD Overload
Load requirement in
excess of the capability of
the ASD. • Carrier frequency is too high.
• An excessive load.
• Acceleration time is too short.
• DC damping rate is set too high.
• Motor is starting into a spinning load after a momentary
power failure.
• ASD is improperly matched to the application.
OL2
Motor Overload
Load requirement in
excess of the capability of
the motor. • Improper V/f setting.
• Motor is locked.
• Continuous operation at low speed.
• Startup frequency setting adjustment is required.
* Reset ignored if active.
Table 13. WX9 ASD Alarms. (Continued)
LED Display
LCD Display
Description Possible Causes/Troubleshooting