INSTALLATION AND OPERATION
SX TRANSISTOR CONTROL
Page
21
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-24
Motor field current is too high when the
key switch is turned on.
This status code will be displayed when the current
draw in the motor field is too high on start up.
MEMORY RECALL
NO
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Control will not operate.
POSSIBLE CAUSE
Defective control.
Replace controller unit.
NO GRAPHIC FOR THIS
STATUS CODE
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-27
12V buss is too low.
This status code will be displayed when the internal
power supply of the control dips below 9.35V.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor opens and closes and
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
15V under load.
Loose connection at P1.
Insure that the wire connection at P1 is
tight.
Shorted Motor Tachometer
Disconnect tach and run control, if status
code 27 does not appear, check tach.
Defective control.
Replace controller unit.
POWER CONNECTIONS
POS
A1
F1
NEG
A2
F2
F
IEL
D
AR
M
AT
U
R
E
+
-
FU1
L
P1
P17
P2
LINE
N
EG
I
N
PU
T
ST
AR
T
SW
.
P12
R
EG
EN
BR
AKE
SW
+72V
+72V
72 VDC
Updated Sept 2019