Specifications

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20.0 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.
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 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 AC line dipped or sagged.
line voltage.
PWR SAG Power Sag fault: Control board Erratic AC line.
voltage is below tolerance. Perform a factory reset using
A new control board has been Parameter 65-PROGRAM.
installed that is different from This will update the software
the previous version. and allow the fault to be reset.
LANGUAGE Language fault: Selected Defective language EEPROM.
language not present Language EEPROM (U11)
removed after programming.