Alarms - Toshiba G9 Installation And Operation Manual

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Alarms

Table 13 lists the alarm codes that may be displayed during operation of the ASD. Each alarm code is
accompanied by a description and a possible cause. In the event that the source of the malfunction cannot
be determined, contact your Toshiba Sales Representative for further information on the condition and for
an appropriate course of action.
The Alarms are listed in the top-down order that they are checked for activation. Only the first to be
detected will be displayed on the Frequency Command screen.
LED LCD
Screen Screen
CM1 Comm1 Error
Comm2 Error
CM2
E Emergency Off
Main 
MOFF
Under-Voltage
OC Over-Current
*OH Over-Heat
OJ Timer
* Reset ignored if active.
246
Table 13. G9 ASD Alarms.
Description
Internal communications error.
External communications error.
Output signal from the ASD is
terminated and a brake may be
applied if so configured.
Under-voltage condition at the 
3-phase AC input to the ASD.
ASD output current greater than
F601
setting.
ASD ambient temperature
excessive.
Run-time counter exceeded.
Possible Causes
• Improperly programmed ASD.
• Improper communications settings.
• Improperly connected cables.
• Stop-Reset pressed twice at the EOI.
• EOFF command received remotely.
• ASD reset required.
• Low 3-phase utility voltage.
• Defective IGBT (U, V, or W).
• ASD output to the motor is connected incorrectly.
• ASD output phase-to-phase short.
• The ASD is starting into a spinning motor.
• Motor/machine jammed.
• Mechanical brake engaged while the ASD is starting or
while running.
• Accel/Decel time is too short.
• Voltage Boost setting is too high.
• Load fluctuations.
• ASD operating at an elevated temperature.
• ASD is operating at an elevated temperature.
• ASD is too close to heat-generating equipment.
• Cooling fan vent is obstructed (see
on pg. 15).
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
• Type Reset required; select Clear Run Timer.
G9 ASD Installation and Operation Manual
Mounting the ASD