M301L 71
20 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 current exceeded 200%
of drive rating
Phase to ground short.
Phase to phase short.
FX BOOST set too high.
Bad transistor module (IPM).
LO VOLTS Low DC Bus Voltage fault:
DC bus voltage below 60% of
normal.
Low line voltage.
HI VOLTS High DC Bus Voltage fault:
DC bus voltage above 120% of
normal.
High line voltage.
Overhauling load.
DECEL rate is set too fast.
HI TEMP Temperature fault:
Internal drive temperature too
high.
Ambient temperature too high.
Fan failure (if equipped).
OVERLOAD Current Overload fault:
Output current rating exceeded
for too long.
Drive undersized for the
application.
Problem with motor and/or driven
equipment.
PWR TRAN Power Transient fault:
Low line voltage.
AC line dipped or sagged.
PWR SAG Power Sag fault:
Control board voltage is below
tolerance.
A new control board has been
installed that is different from
the previous version.
Erratic AC line.
Perform a factory reset using
Parameter 65-PROGRAM.
This will update the software
and allow the fault to be reset.
LANGUAGE Language fault:
Selected language not present
Defective language EEPROM.
Language EEPROM (U11)
removed after programming.
EXTERNAL External fault:
TB-13D is open or closed to
TB-2, depending on setting of
Parameter 50 - TB13D.
Check setting of Parameter 50.
Check devices wired between
TB13D and TB-2.
DB ERROR Dynamic Brake fault:
DB circuit has sensed a resistor
overload.
The DB duty cycle is too high, causing
the resistors to overheat.
To Next Page
Loading...
