DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL
Page
28
October 1998
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-27
Power supply is less than 10 Volts DC.
This status code will be displayed when the power
supply is less than 10 volts.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor opens and closes, then can only
be closed by opening and closing the key
switch.
POSSIBLE CAUSE
Discharged Battery
•
=
Check battery to insure proper state of charge.
Voltage may be dropping below 10 Volts DC
under load.
Loose connection at P1.
•
=
Insure that the wire connection at P1 is tight.
Defective control.
•
=
Replace controller unit.
NEG
+
-
FU3
KEY
SWITCH
P1 P2
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 35 or 70 seconds, depending on control
type.
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 35 or 70 seconds, depending
on control type.
Function 7 is mis-adjusted to allow higher than
normal motor field current.
•
=
Adjust function per OEM instructions.
NO GRAPHIC FOR THIS
STATUS CODE
