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Alarms, Trips, and Troubleshooting
W7B ASD Installation & Operation Manual
Trips/Faults
A Trip is an ASD response to a Fault. A Trip is a
safety feature that disables the ASD system in the
event that a subsystem of the ASD is
malfunctioning.
Listed in
are the possible Faults that may
cause a Trip and the possible causes. When a Trip
is incurred, the system displays the Fault screen.
The Fault screen identifies the active Fault.
Table 11. Trips and Faults.
Fault Screen Display
Possible Causes
Note:
The event that caused the Trip(s) must be corrected or must decrease to less than the threshold
value required to cause the trip to allow for a Reset to be recognized. In the event of multiple active trips,
the trip displayed will remain until all faults are corrected and all trips are cleared.
ASD Overload
• Acceleration time is too short.
• DC Injection current is too high.
• V/f setting needs to be adjusted.
• Motor running during restart.
• ASD or the motor is improperly matched to the application.
Autotune Error
• Autotune readings that are significantly inconsistent with the
configuration information.
• A non-3-phase motor is being used.
• Incorrect settings at parameter
,
, or
• Using a motor that has a significantly smaller rating than the ASD.
• ASD output cabling is too small, too long, or is being housed in a
cable tray with other cables that are producing an interfering EMF.
• Motor is running during the Autotune function.
Communication Error
• Communication malfunction.
• Improper or loose connection.
• Improper system settings.
CPU Fault
• CPU malfunction.
Ctrl.EEPROM Data Err
• Internal EEPROM malfunction.
DC Bus Undervoltage
• This fault is caused by an under-voltage condition at the 5, 15, or
the 24 VDC supply.
• 3-phase input voltage low.
DC Fuse Open
• Internal DC bus fuse is open.
EEPROM Write Error
• EEPROM write malfunction.
Emergency Off
• Emergency Off command received via EOI or remotely.
Encoder Loss
• Encoder signal missing while running during closed-loop operation.
Flash Memory Fault
• Flash memory malfunction.
Gate Array Fault
• Defective Gate Array or Gate Array malfunction.
Input Phase Loss
• 3-phase input to the ASD is low or missing.
Summary of Contents for W7 DN-57442-006
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