DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL
Page
32
September 2004
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-28
Motor field current is too high during
the run mode.
This status code will be displayed when the current in
the motor field is sustained above a preset limit for
longer than 70 seconds.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Control will not operate.
POSSIBLE CAUSE
Continued operation of vehicle in high
motor current condition.
•
Operate vehicle at lower motor
current condition for 70 seconds.
Function 7 is mis-adjusted to allow
higher than normal motor field current.
•
Adjust function per OEM
instructions.
THE PRESENCE OF THIS STATUS CODE IS
NOT NECESSARILY INDICATIVE OF A
CONTROL ISSUE. IF FUNCTION 7 IS NOT
MIS-ADJUSTED, THE STATUS CODE
INDICATES AN APPLICATION ISSUE
WHERE A MOTOR IS BEING STALLED,
ETC. DISPLAY OF THIS STATUS CODE
SHOULD NOT TRIGGER THE RETURN OF A
CONTROL FOR REPAIR OR
REPLACEMENT.
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-41
Shorted thermal protector (TP) or
armature transistor over temperature.
This status code will be displayed when the voltage at
the thermal protector is too low.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Reduced or no power to traction motor in
control range.
POSSIBLE CAUSE
Control is in thermal cut-back.
•
Allow control to cool, status code should
disappear.
Defective control.
•
Replace controller unit.
THE PRESENCE OF THIS STATUS CODE
IS NOT NECESSARILY INDICATIVE OF A
CONTROL ISSUE. THIS STATUS CODE
MAY INDICATE AN APPLICATION ISSUE.
DISPLAY OF THIS STATUS CODE
SHOULD NOT TRIGGER THE RETURN OF
A CONTROL FOR REPAIR OR
REPLACEMENT.