DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL Page 30
Revised May 2003
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
Open thermal protector (TP) or
transistor over temperature.
This status code will be displayed when the voltage at
the thermal protector is too high.
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. THE STATUS CODE
MAY INDICATE 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.
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