Wesley SCT-7750-8AC - Manual (Page 31)

31 Owner’s Manual and Service Guide – SC & SCT Series
COMPONENTS - ELECTRICAL
Fault Codes and Troubleshooting Chart:
Table 7 TROUBLESHOOTING CHART
LED
CODE
PROGRAMMER
LCD DISPLAY
FAULT
CATEGORY
POSSIBLE
CAUSE
FAULT CLEARANCE
0,1 NO KNOWN FAULTS 0
n/a
n/a
1,1 CURRENT SHUNT FAULT 1
1. Abnormal vehicle operation causing current
spikes.
2. Current sensor out of range.
3. Controller Failure.
Cycle KSI. If problem
persists, replace controller.
1,2 HN FAILSAFE 1
1. Noisy environment.
2. Self-test or watchdog fault.
3. Controller failure.
Cycle KSI. If problem
persists, replace controller.
1,3 M - SHORTED 1
1. Internal or external short of M- to B-.
2. Incorrect motor wiring.
3. Controller failure.
Check wiring; cycle KSI. If
problem persists, replace
controller
1,4 SRO 3
1. Improper sequence of KSI, interlock, and
direction inputs.
2. Interlock or direction switch circuit open.
3. Sequencing delay too short.
4. Wrong SRO or throttle type selected.
5. Misadjusted throttle pot.
Follow proper sequence;
adjust throttle if necessary;
adjust programmable
parameters if necessary.
2,1 THROTTLE WIPER HI 1
1. Throttle input wire open or shorted to B+.
2. Defective throttle pot.
3. Wrong throttle type selected.
When Throttle Wiper High
input returns to valid range.
2,2 EMR REV WIRING 1
1. Emergency reverse wire or check wire
open.
Re-apply emergency
reverse or cycle interlock.
2,3 HPD 3
1. Improper sequence of KSI, interlock, and
throttle inputs.
2. Misadjusted throttle pot.
3. Sequencing delay too short.
4. Wrong HPD or throttle type selected
Follow proper sequence;
adjust throttle if necessary;
adjust programmable
parameters if necessary.
SRVC TOTAL 3
1. Total maintenance timer expired.
Reset with programmer.
SRVC TRAC 3
1. Traction maintenance timer expired
Rese/t with programmer.
TOTAL DISABLED 3
1. Total disable timer expired.
Reset with programmer.
TRAC DISABLED 3
1. Traction disable timer expired.
Reset with programmer.
2,4 THROTTLE WIPER LO 1
1. Throttle pot wire open or shorted to B+.
2. Wrong throttle type selected.
3. Defective throttle pot.
When Throttle Wiper Low
input returns to valid range.
3,1 FIELD SHORT 1
1. Main contractor coil shorted.
2. Field winding shorted to B+ or B-.
3. Field resistance too low.
Check contactor coil and
field winding; cycle KSI.
3,2 MAIN CONT WELDED 1
1. Main contactor stuck closed.
2. Main contactor driver shorted.
Check wiring and
contactor; cycle KSI.
3,3 FIELD OPEN 1
1. Field winding connection open.
2. Field winding open.
Check wiring and cycle
KSI.
3,4 MISSING CONTACTOR 1
1. Main contactor coil open.
2. Main contactor missing.
3. Wire to main contactor open.
Check wiring and cycle
KSI.