Alarms, Trips, and Troubleshooting
W7B ASD Installation & Operation Manual
https://www.toshiba.com/tic/
179
Alarms
lists the alarm codes that may be
displayed during operation of the 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 the TIC
Customer Support Center for additional information
on the condition and for an appropriate course of
action.
The active Alarm is displayed on the Frequency
Command screen. Multiple active alarms are
displayed one at a time and are scrolled at one-
second intervals.
Table 10. ASD Alarms.
EOI
Display
Function
Description
Possible Causes
*
Reset ignored if active.
CM1
Comm1 Error
Internal communications
error.
• Improperly programmed ASD.
• Improper communications settings.
• Improperly connected cables.
CM2
Comm2 Error
External communications
error.
EMG
Emergency
Off
Output signal from the
ASD is terminated and a
brake may be applied if so
configured.
• Stop-Reset pressed twice on the EOI.
• EOFF command received remotely.
• ASD reset required.
MOFF
Main
Under-Voltage
Under-voltage condition at
the 3-phase AC input to
the ASD.
• Low 3-phase input voltage.
OC
Over-Current
ASD output current greater
than the parameter
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 jammed.
• Mechanical brake engaged while the ASD is
starting or while running.
• Accel/Decel time is too short.
• Torque Boost setting is too high.
• Load fluctuations.
• ASD 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
).
• Cooling fan is inoperative.
• Internal thermistor is disconnected.
OJ
Timer
Run-time counter
exceeded.
• Type Reset required; select Clear run timer.
Summary of Contents for W7 DN-57442-006
Page 1: ...ADJUSTABLE SPEED DRIVES W7 DN 57442 006 INSTALLATION OPERATION MANUAL June 2020 ...
Page 2: ......
Page 3: ...Document Number 57442 006 Date June 2020 W7 ASD Installation and Operation Manual ...
Page 4: ......
Page 60: ......
Page 221: ......