74
FAULT MESSAGES
FAULT DESCRIPTION POSSIBLE CAUSES
OUTPUT Output transistor fault: Output Phase to ground short.
current exceeded 200% of drive Phase to phase short.
rating. FX or AC BOOST set too high.
Bad transistor module (IPM).
LO VOLTS Low DC Bus Voltage fault: DC Low line voltage.
bus voltage below 60% of normal.
HI VOLTS High DC Bus Voltage fault: DC High line voltage.
bus voltage above 120% of Overhauling load.
normal. DECEL rate is set too fast.
HI TEMP Temperature fault: Internal Ambient temperature too high.
drive temperature too high. Fan failure (if equipped).
OVERLOAD Current Overload fault: Output Drive undersized for the
current rating exceeded for too application.
long. Problem with motor and/or
driven equipment.
PWR TRAN Power Transient fault: Low line AC line dipped or sagged.
voltage.
19.0 TROUBLESHOOTING
The table below lists the fault conditions that will cause the drive to shut down, as
well as some possible causes. Please contact the factory for more information on
troubleshooting faults.
NOTE: The drive will not automatically restart after a PWR SAG or a CONTROL
fault. Also, if an OUTPUT fault occurs below 1.5 Hz, the drive will only attempt
one restart, after a four minute delay. If unsuccessful, it will then trip into FAULT
LOCKOUT, which will require a manual reset. This is done to protect the drive
in case of a shorted motor.
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