DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL
Page
26
June 2002
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-49
Motor field current is too low during the
run mode.
This status code will be displayed when the current
draw in the motor field is less than 1.3 amps and
armature current is greater than 100 amps for more
than 1.27 seconds during the run mode.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Control will not operate.
POSSIBLE CAUSE
Check for open circuit in motor field
winding.
Verify that all cable connections from
the control to the motor are tight.
Defective control.
•
Replace controller unit.
NO GRAPHIC FOR THIS
STATUS CODE
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-51
Capacitor volts are low before the line
contactor closes.
This status code will be displayed during “key on”
when the capacitor volts is less than 85% of battery
volts at initial tow switch on.
MEMORY RECALL
NO
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor does not close when
capacitor does not pre-charge.
POSSIBLE CAUSE
Defective control fuse.
•
Check control fuse for open circuit
condition. Replace fuse, if
necessary.
Another load has been placed on the
switched side of the line contactor.
Defective control.
•
Replace controller unit.
POWER CONNECTIONS
TO CONTROL
POS
A1
F1
NEG
A2
F2
FI
EL
D
A
R
MA
TURE
A1
A2
A1
A2
F2
F1
BATT
+
-
FU1 *
LINE *
400A
FU3 *
10A
