INSTALLATION AND OPERATION
SX TRANSISTOR CONTROL
Page
28
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-76
Capacitor (1C) voltage too high during
pedal up regen braking.
This status code will be displayed when the voltage at
1C exceeds 96 volts during the regenerative braking
cycle.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor opens and closes, then
opens and can only close by opening
and closing the key switch.
POSSIBLE CAUSE
Batteries are overcharged.
Regen current too high, cycle key
switch off then on.
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
TRACTION
STATUS CODE
DESCRIPTION OF STATUS
CAUSE OF STATUS INDICATION
-77
Capacitor (1C) voltage too high during
motoring.
This status code will be displayed when the voltage at
1C exceeds 96 volts during motoring.
MEMORY RECALL
YES
CORRECTIVE ACTIONS
TROUBLE-SHOOTING DIAGRAM
Circuits valid
for
Traction
Controller
SYMPTOM
Line contactor opens and closes, then
opens and can only close by opening and
closing the key switch.
POSSIBLE CAUSE
Regen current too high, cycle key
switch off then on.
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