114
SJ30AJE, SJ30ARJE196274AF
Section 4 – Troubleshooting Information Electrical System
4.2-36 No Manual Platform Level Up from Platform Control Console
1. No output on pin #6 of the valve driver to
platform level switch S12 on wire #40B.
Check pin #6 for 12 volts. If no voltage present
with foot on footswitch check section 5 forOCM pin
voltage reference.
2. Defective platform leveling switch S12. Check continuity through switch while activating
level up function between wires #40B and #41.
3. Loose or broken wire #41 from platform level
switch S12 to platform terminal block.
Check continuity. Replace if defective.
4. Open or defective diode D41. Check diode. Replace if defective.
5. Loose or broken wire #40A from platform
terminal block to valve driver pin #18.
Check for 12 volts at pin #18. Check continuity.
Replace if defective.
6. No output on pin #23 of the valve driver to wire
#20A.
Check pin #23 for proportional voltage. This
voltage varies with the A3 boom speed control. If
no voltage present with foot on footswitch check
section 5 for OCM pin voltage reference.
7. Loose or broken wire #41 from platform terminal
block to plug B pin #11 in platform control
console.
Check continuity. Replace if defective.
8. Loose or broken wire #41 in boom cable B or its
connectors.
9. Loose or broken wire #41 from base connector
plug B pin #11 to base terminal block.
Check continuity. Replace if defective.
10. Loose or broken wire #41 from base terminal
block to main manifold harness.
Check continuity. Replace if defective.
11. Loose or broken wire #41 from main manifold
harness to platform level up valve 4H-41.
Check continuity. Replace if defective.
12. Loose or broken wire #02 from main manifold
harness to platform level up valve 4H-41.
Check continuity. Replace if defective.
13. Defective platform level up coil 4H-41. Check continuity and resistance through coil.
Replace if defective.
NOTE
Platform level function will not operate if you are commanding any other boom function.
To Next Page
Loading...
