Skyjack SJ16 Service Manual

71
SJ12, SJ16
213558ADA
Electrical System Troubleshooting Section 4 – Troubleshooting Information
4.2-2 All Controls Except for Down Function Inoperative
1. Loose or broken wire #59B from base terminal
block to motor controller.
Check continuity. Replace if defective.
2. Loose or broken wire #19A from base terminal
block to diagnostic switch S5.
Check continuity. Replace if defective.
3. Loose or broken wire #19A from Diagnostic
switch S5 to Mast Control cable.
Check continuity. Replace if defective.
4. Loose or broken wire #19A in mast control cable
or its connectors.
Check continuity between Mast function cable
connector P2 pin #5 and Platform connector X1
pin #C4/C5 on cable. Check for loose or corroded
connections on cable connectors.Replace if wire is
defective.
5. Loose or broken wire #19A from Control Box
connector #C4/C5 to Limit switch LS3.
Check continuity. Replace if defective.
6. Loose or broken wire #19B from limit switch LS3
to control box connector pin #C9.
Check continuity. Replace if defective.
7. Defective limit switch LS3. Check limit switch. Replace if defective.
8. Loose or broken wire #19B in mast control cable
or its connectors.
Check continuity between Mast function cable
connector P2 pin #5 and Platform connector X1
pin #C4 on cable. Check for loose or corroded
connections on cable connectors.Replace if wire is
defective.
9. Loose or broken wire #19B from diagnostic
switch S5 to mast control cable.
Check continuity. Replace if defective.
10. Loose or broken wire #19B from diagnostic
switch S5 to motor controller.(Enable signal)
Check continuity. Replace if defective.
11. Loose or broken wire B- cable from batteries to
B- lug on motor controller.
Check continuity. Replace if defective.
12. Loose or broken wire B+ from main battery
disconnect switch S1 to motor contactor C1.
Check continuity. Replace if defective.
13. Loose or broken wire B+ from motor contactor
C1 to motor DCM1.
Check continuity. Replace if defective.
14. Loose or broken wire B+ from motor DCM1 to
B+ lug on motor controller.
Check continuity. Replace if defective.
15. Loose or broken wire B- from B+ from Motor
DCM1 to M- lug on Motor Controller.
Check continuity. Replace if defective.
16. Defective motor controller. Check motor controller input and output voltage.
Replace if defective.
17. Defective Motor DCM1. Supply the Motor DCM1 with 24 volt supply and a
B- across motor to check operation of Motor DCM1.
Replace if defective

Skyjack SJ16 Specifications

General

Gradeability	25%
Drive Motor	24V DC
Max Gradeability	25%
Platform Height	16 ft
Lift Capacity	500 lbs
Machine Width	0.76 m
Overall Width	0.76 m
Drive Speed (Stowed)	4.8 km/h
Drive Speed (Raised)	0.8 km/h
Turning Radius (Inside)	0 in
Power Source	24V DC Electric