Skyjack 4632 - Page 71

SECTION 4, Page 3SJIII Series - The Conventionals 129919
Troubleshooting Information - Electrical System
Probable Cause Remedy
1. Battery Charger plugged into external power source.
2. Batteries disconnected.
3. Dirty or loose battery terminals.
4. Battery charge low.
5. Main battery cables open or defective.
6. Fuse (F1) defective.
7. Main Battery Disconnect Switch (S1)
open or defective.
8. Loose or broken wire #3 from Motor Contactor (C1)
to Circuit Breaker (CB2).
9. Defective Battery Charger Relay (L1CR).
10. Defective or tripped Circuit Breaker (CB2).
11. Loose or broken wire #5 from Charger Relay (L1CR)
to Base Terminal Block (TB-1).
12. Loose or broken wire #5 from base terminal block
(TB-1) to enable switch (S10).
13. Defective enable switch (S10).
14. Loose or broken wire #00 from Pump Motor (DCM1)
to Circuit Breaker (CB1).
15. Defective or tripped Circuit Breaker (CB1).
16. Loose or broken wire #2 from Circuit Breaker (CB1)
to Base Terminal Block (TB-1).
17. Loose or broken wire #19A from Base Terminal Block
(TB-1) to Contactor (C1).
18. Contactor (C1) defective.
19. Defective Pump Motor (DCM1).
20. Loose or broken wire #59B from Relay (21CCR) to
Proportional Valve Coil (2H-59B).
21. Loose or broken wire #02 from Proportional Valve
Coil (2H-59B) to Base Terminal Block (TB-1).
22. Defective Proportional Valve Coil (2H-59B).
1. Disconnect charger cord.
2. Connect batteries.
3. Clean and tighten connections.
4. 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. Check continuity. Replace if defective.
6. Replace fuse.
7. Close switch. Check continuity. Replace if defective.
8. Check continuity. Replace if defective
9. Check relay. Replace if defective.
10. Reset circuit breaker. Replace if defective.
11. Check continuity. Replace if defective.
12. Check continuity. Replace if defective.
13. Check switch replace if defective.
14. Check continuity. Replace if defective.
15. Reset circuit breaker. Replace if defective.
16. Check continuity. Replace if defective.
17. Check continuity. Replace if defective.
18. Check contactor. Replace if defective.
19. Check motor. Replace if defective.
20. Check continuity. Replace if defective.
21. Check continuity. Replace if defective.
22. Check continuity through coil. Reading should be
19ohms. Replace if defective.
4.1-1. All Controls Inoperative
1. Loose or broken wire #5 from the normally open
contact to the normally closed contact on the enable
switch (S10).
2. Defective normally closed contact on enable switch
(S10).
3. Loose or broken wire #7 from enable switch (S10) to
base terminal block (TB-1).
4. Loose or broken wire #07 from Base Terminal Block
(TB-1) to Platform Emergency Stop Switch (S4).
5. Open or defective Platform Emergency stop
switch (S4).
6. Loose or broken wire #7A from Platform Emergency
Stop Switch (S4) to Key Switch (S3).
7. Open or defective Key Switch (S3).
1. Check continuity. Replace if defective.
2. Check continuity through contact. Replace if defective.
3. Check continuity. Replace if defective.
4. Check continuity. Replace if defective.
5. Close switch. Replace if defective.
6. Check continuity. Replace if defective.
7. Close switch. Replace if defective.
4.1-2. All Controls Inoperative From Platform