DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL
Page
29
October 2002
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-27
Control’s power supply is less than 10
Volts DC.
This status code will be displayed when the control’s
power supply is less than 10 volts.
MEMORY RE ALL
C
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor closes and opens, 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.
NEG
+
-
FU3
KEY
SWITCH
P1
P2
FU5
P18
1A
L
P17
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-28
Motor field current has remained 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 RE ALL
C
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. 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