DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL
Page
27
November 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 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.
POWER CONNECTIONS
POS
A1
F1
NEG
A2
F2
FIELD
ARM
A
T
URE
SP
A1
A2
S1
S2
SP
+
-
FU5
15A
KEY
SWITCH
L
P1
P17
P2
1A
P18
1A
P7
ACC POT
FU4
60A
P1
A1
A2
S1
S2
P1
FU2
300A
P2
A1
A2
S1
S2
P2
FU3
300A
LINE
FU1
500A
PL-1
PL-2
PL-9
2
12
12
10
29
41
45
13
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 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.
POWER CONNECTIONS
POS
A1
F1
NEG
A2
F2
FIE
L
D
ARMAT
URE
KEY
SWITCH
L
P1
P17
P2
P6
P3
P4
P5
SEAT
SW.
ST
ART
SW.
F
O
RWARD SW.
REVERSE SW.
1A
P18
1A
P7
ACC POT
P10
BRAKE
SW.
PL-1
PL-2
PL-3
PL-4
PL-5
PL-6
PL-9
12
10
29
15
6
8
7
41
45
13