SKYJACK, Page 4 SJIII Conventional Series
143911
Section 4 - Troubleshooting InformationService and Maintenance
Electrical System
4.1-1 All Controls Inoperative
1. Battery Charger plugged into external power source.
Disconnect charger cord. -
2. Batteries disconnected.
Connect batteries. -
3. Dirty or loose battery terminals.
Clean and tighten connections. -
4. Battery charge low.
Check each cell with hydrometer. Reading should be 1.275 (fully charged). Recharge if low -
reading. Replace if reading difference between cells is 0.050.
5. Main battery cables open or defective.
Check continuity. Replace if defective. -
6. Fuse F1 defective.
Replace fuse. -
7. Main battery disconnect switch S1 open or defective.
Close switch. Check continuity. Replace if defective. -
8. Loose or broken wire #3 from motor contactor C1 to circuit breaker CB2.
Check continuity. Replace if defective. -
9. Loose or broken wire #3A from circuit breaker CB2 to charger relay L1CR.
Check continuity. Replace if defective. -
10. Defective battery charger relay L1CR.
Check relay. Replace if defective. -
11. Defective or tripped circuit breaker CB2.
Reset circuit breaker. Replace if defective. -
12. Loose or broken wire #5 from charger relay L1CR to base terminal block TB-1.
Check continuity. Replace if defective. -
13. Loose or broken wire #5 from base terminal block TB-1 to base emergency stop switch S28.
Check continuity. Replace if defective. -
14. Open or defective base emergency stop switch S28.
Close switch. Check switch. Replace if defective. -
15. Loose or broken wire #5A from base emergency stop switch S28 to base key switch S10.
Check continuity. Replace if defective. -
16. Open or defective base key switch S10.
Select function with switch. Check switch. Replace if defective. -
17. Loose or broken wire #00 from pump motor DCM1 to circuit breaker CB1.
Check continuity. Replace if defective. -
18. Defective or tripped circuit breaker CB1.
Reset circuit breaker. Replace if defective. -
19. Loose or broken wire #2 from circuit breaker CB1 to base terminal block TB-1.
Check continuity. Replace if defective. -
20. Loose or broken wire #7A from base terminal block to CM1 control module pin P2-12. (CE)
Check continuity. Replace if defective. -
21. Loose or broken wire #02 from base terminal block to CM1 control module pin P2-11. (CE)
Check continuity. Replace if defective. -
4.1-2 All Controls Except for Down Function Inoperative
1. Loose or broken wire #19A (ANSI/CSA) or wire #19B (CE) from base terminal block TB-1 to contactor
C1.
Check continuity. Replace if defective. -
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