Electrical System; All Controls Inoperative - Skyjack SJ12 E Service Manual

Section 4 – Troubleshooting Information

4.2 Electrical System

4.2-1 All Controls Inoperative

NOTE
Functions may be disabled by the load sense system. Please first make sure that the mast is fully retracted,
the platform is free of added weight, and there are no faults in the load sense system .
Functions may be disabled by the machine control system. Please first make sure that the machine is on a
firm level surface, the charger is not plugged in, and check for any messages or codes displayed. Refer to
section 5 .7-2 Display Module Error
1. Battery cables loose/disconnected
2. Battery Discharged or Defective
3. Fuse F1 defective or open
4. Loose or broken B+ cable 03 from batteries to
battery disconnect switch S1
5. Open or defective battery disconnect switch S1
6. Loose or broken wire #03A from battery
disconnect switch S1 to motor contactor C1
common
7. Loose or broken wire #03A from motor contactor
C1 to circuit breaker CB1
8. Circuit breaker CB1 tripped or defective.
9. Loose or broken wire #05 from circuit breaker
CB1 to base emergency stop switch S28.
10. Open or defective base emergency stop switch
S28.
11. Loose or broken wire #05A from base
emergency stop switch S28 to base key switch
S10.
12. Loose or broken #05A wires between base key
switch S10 terminals
13. Open or defective key select switch S10
14. Loose or broken wire #08C from base key switch
S10 to motor contactor C1 coil +
15. Loose or broken wire #08C from motor contactor
C1 coil + to machine controller pin A3.
16. Loose or broken wire 07 from base key switch to
machine controller pin B12
241914ACA
64
Codes .
Tighten or connect battery cables
Charge battery or replace if defective
Replace fuse.
Check continuity. Replace if defective.
Close switch. Replace if defective
Check continuity. Replace if defective
Check continuity. Replace if defective
Reset breaker, check for defective wiring. Replace
if defective.
Check continuity. Replace if defective.
Close switch. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Close switch. Replace if defective
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Electrical System
SJ12 E, SJ16 E, SJ20 E