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Alarms
Table 18
lists the alarm codes that may be displayed during operation of the HX7+ ASD. Each alarm code
listed is accompanied by a description and a possible cause. In the event that the source of the malfunction
cannot be determined, contact your 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
Keypad
Function
Display
CM1
Comm1 Error
CM2
Comm2 Error
EMG
Emergency Off
MOFF
Main
Undervoltage
OC
Over Current
*OH
Overheat
OJ
Timer
* Reset ignored if active.
HX7+ ASD Installation and Operation Manual
Toshiba Customer Support Center
Frequency Command
Table 18. HX7+ 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.
Undervoltage 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.
for further information on the
screen.
Possible Causes
• Improperly programmed ASD.
• Improper communications settings.
• Improperly connected cables.
• Stop|Reset pressed twice at the keypad.
• EOFF command received remotely.
• ASD reset required.
• Low 3-phase commercial power voltage too low.
• 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 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.
23).
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
• Type Reset required; select Clear run timer.
Mounting the ASD
197
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