HX7+ ASD Installation and Operation Manual
199
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
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 19. HX7+ ASD Faults.
Fault Screen Display
Possible Causes
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
, 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.
Control Power Undervoltage
• This fault is caused by an undervoltage condition at the 5, 15, or the 24 VDC
supply.
• 3-phase input voltage low.
CPU Fault
• CPU malfunction.
DC Bus Undervoltage
• 3-phase input voltage low.
• Defective control board.
• Excessive load on the power supply.
• Undervoltage/Ridethrough settings require adjustment.
DC Fuse Open
• Internal DC bus fuse is open.
Dynamic Braking Resistor Overcurrent
• 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.
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.
Summary of Contents for HX7+ ASD
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Page 235: ...226 HX7 ASD Installation and Operation Manual Figure 43 66 163 kVA 18 Pulse Enclosure ...
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