DIAGNOSTIC STATUS CODES
IT TRANSISTOR CONTROL
Page
27
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 RECALL
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
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
draw 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. 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.
November 2005