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Trips/Faults
A Trip is an ASD response to a Fault (though, Fault and Trip are sometimes used interchangeably). A
Trip is a safety feature that disables the ASD system in the event that a subsystem of the ASD is
malfunctioning.
Listed in
Table 19
incurred the system displays the Fault screen. The Fault screen identifies the active Fault.
Fault Screen Display
ASD Overload
Autotune Error
Communication Error
Control Power Undervoltage
CPU Fault
DC Bus Undervoltage
DC Fuse Open
Dynamic Braking Resistor Overcurrent
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.
HX7+ ASD Installation and Operation Manual
are the possible Faults that may cause a Trip and the possible causes. When a Trip is
Table 19. HX7+ ASD Faults.
• 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 readings that are significantly inconsistent with the configuration
information.
• A non-3-phase motor is being used.
• Incorrect settings at F400, F413, or F414.
• 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 malfunction.
• Improper or loose connection.
• Improper system settings.
• This fault is caused by an undervoltage condition at the 5, 15, or the 24 VDC
supply.
• 3-phase input voltage low.
• CPU malfunction.
• 3-phase input voltage low.
• Defective control board.
• Excessive load on the power supply.
• Undervoltage/Ridethrough settings require adjustment.
• Internal DC bus fuse is open.
• ASD inability to discharge the bus voltage during regeneration.
• No dynamic braking resistor (DBR) installed.
• Deceleration time is too short.
• Improper DBR setup information.
• Defective IGBT7 (or IGBT7 circuit).
• 3-phase input voltage is above specification.
Possible Causes
199
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