Specifications

Disconnect motor
leads from controller.
Resistance between
motor terminals on
controller and B−
should be 1 mega
ohm or more.
Logic
Traction motor current sensor error.
The controller uses the traction motor current sensor to detect incorrect current in the
traction motor circuit.
LED
Code
Dash
Display
Model Programmer Display
1,2
Code
12
All
HW Failsafe
Condition
Self Test or Watchdog
Error.
Truck Response
No Controller Operation
Possible Causes and
Test Procedures
1. Turn key switch to
OFF position to reset
the controller.
2. If fault reoccurs,
replace controller.
Circuit Description
Logic
Displayed when the internal check logic of the controller determines an internal failure
of the controller.
LED
Code
Dash
Display
Model Programmer Display
1,3
Code
13
All
Drive M−
Condition
External short of
Traction motor M− to
B−.
Truck Response
No Traction
Possible Causes and
Test Procedures
1. Incorrect traction
motor wiring.
Check wiring to
traction motor.
Ensure all wiring
connections are
tight.
2. Traction motor
shorted to frame.
Disconnect motor
leads at motor.
Measure resistance
between motor
terminals and truck
frame. If less than 1
megohm, replace
motor.
3. M− short in
controller.
Verify voltage
between B− and M−
to be 10% less than
nominal battery
volts.
If greater than 10%,
replace controller.
Disconnect motor
leads at controller.
Measure resistance
between B− and
M−.
If less than 1
megohm, replace
controller.
Circuit Description
Logic
The controller uses an internal check to ensure the traction motor M− connection is
not shorted to B− (Battery Negative).
LED Dash
Model Programmer Display
524164719-2200YRM0928-(07-2010)-US-EN
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4/29/2013 7:30 PM