DIAGNOSTIC STATUS CODES
SX TRANSISTOR CONTROL Page 40
January 1999
TRACTION
STATUS CODE
DESCRIPTION OF STATUS CAUSE OF STATUS INDICATION
-76
Capacitor (1C) voltage too high. This status code will be displayed when the voltage
on the capacitor goes above limit voltage* 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
•= Unplugging the battery connector during
regenerative braking.
•= Line contactor bouncing open during regen.
•= Main power fuse opening during regen.
•= Intermittent battery plug connection.
* Limit Voltage:
Limit Battery Voltage
50V 36V
70V 48V
96V 72//80V
POWER CONNECTIONS
LEFT CONTROL
POS A1 F1
NEG A2 F2
FIELD
ARMATURE
FU4
A1
A2
S1
S2
SP
+
-
FU1
POWER CONNECTIONS
RIGHT CONTROL
POS A1 F1
NEG A2 F2
FIELD
ARMATURE
L
P1 P17 P2 P6 P3 P4 P5
SEAT SW.
START SW.
FORWARD SW.
REVERSE
SW.
P23 P22P10 P13
SERIAL RECEIVE
SERIAL TRANSMIT
BDI INTERRUPT
P14 P15
I-MOTOR OUTPUT
BRAKESW.
STEER PUMP
FIELD
STEER PUMP
ARM
P11 P18
1A OR SP DVR
PLUG/RGN
OUTPUT
LEFT
CONTROL
(MASTER)
TO PUMP
CONTROL
POSITIVE
TO PUMP CONTROL POSITIVE
LINE
SPEED LIMIT SWITCH
FU3
KEY SWITCH
BRAKE SW.
TRACTION
STATUS CODE
DESCRIPTION OF STATUS CAUSE OF STATUS INDICATION
-77
Motor current is detected during
regenerative braking.
This status code will be displayed when motoring
current is detected 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
Defective control.
•= Replace controller unit
POWER CONNECTIONS
LEFT CONTROL
POS A1 F1
NEG A2 F2
FIELD
ARMATURE
FU4
A1
A2
S1
S2
SP
+
-
FU1
POWER CONNECTIONS
RIGHT CONTROL
POS A1 F1
NEG A2 F2
FIELD
ARMATURE
L
P1 P17 P2 P6 P3 P4 P5
SEAT SW.
START SW.
FORWARD SW.
REVERSE
SW.
P23 P22P10 P13
SERIAL RECEIVE
SERIAL TRANSMIT
BDI INTERRUPT
P14 P15
I-MOTOR OUTPUT
BRAKESW.
STEER PUMP
FIELD
STEER PUMP
ARM
P11 P18
1A OR SP DVR
PLUG/RGN
OUTPUT
LEFT
CONTROL
(MASTER)
TO PUMP
CONTROL
POSITIVE
TO PUMP CONTROL POSITIVE
LINE
SPEED LIMIT SWITCH
FU3
KEY SWITCH
BRAKE SW.
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