TOSHIBA - 68
TX Series 48 - 1250A
Problem CPU LCD Display LED
Aux
Relay
Possible Cause Solutions
Improper programming
Check motor nameplate versus
programmed parameters
Possible load damage or
jammed load
Check motor currents
Improper setting for motor
load condition
Verify current limit setting
Damaged load Check for load failure
Check setpoint settings
Check load
Failed CPU or Main Firing
Board
Contact factory
Vibration Check internal wiring connections
Troubleshoot and repair generator
Contact utilities company
Main board failure
Three phase power removed from Main
Board
Improper programming Check program setpoints
Any wire going to ground
(I.e. stator ground, motor
ground, soft start ground)
Check with meggar or Hi-pot motor leads
and motor
High vibration or loose
connections
Check internal connections
Load shorted/ grounded/
faulted
Remove power and repair.
Faulty main circuit board Replace the main circuit board
Short in control circuit
Remove power, locate and remove this
short
Wrong control voltage
Apply the correct voltage to the control
circuit
Warning:
This is a serious fault condition. Ensure that the fault
condition is cleared on the load before attempting to restart the motor
Control circuit
fuses blow after
control power is
applied.
None None None
Motor stopped
during run
Check for fault indication Trip AUX1
Improper programming or
unloaded motor
Line Frequency
Trip
OVER OR UNDER
FREQUENCY TRIP
Trip AUX1
Generator Power Problem
or grid change
AUX1
Self-test Failure
SELF-TEST FAILURE
Trip
Stall prevention
ACCEL TIME TRIP
Trip AUX1
Overload
OVERLOAD TRIP Trip AUX1
Under Current
Trip
AUX1
AUX1
Any Ground Fault
Trip (Pending)
GROUND FAULT
HI-SET OR LO-SET
(Pending)
Trip
UNDER CURRENT TRIP
Trip
