100
SJ30AJE, SJ30ARJE196274AF
Section 4 – Troubleshooting Information Electrical System
4.2-20 No Manual Platform Level Down from Base Control Console
1. Loose or broken wire #10A from enable switch
S21 to platform level switch S13.
Check continuity. Replace if defective.
2. Defective platform level switch S13. Check continuity through switch while activating
platform level down function between wires #10A
and #40. If no continuity found, replace switch.
3. Loose or broken wire #40 from platform level
switch S13 to base terminal block.
Check continuity. Replace if defective.
4. Open or defective diode D40. Check diode. Replace if defective.
5. Loose or broken wire #73 from base terminal
block to motor control harness A.
Check continuity. Replace if defective.
6. Loose or broken wire #73 from motor control
harness A pin #22 to left motor controller pin
#LM32.
Check continuity. Replace if defective.
7. Loose or broken wire #40 from base terminal
block to main manifold harness pin #11.
Check continuity. Replace if defective.
8. Loose or broken wire #40 from main manifold
harness plug pin #11 to platform level down
valve 4H-40.
Check continuity. Replace if defective.
9. Loose or broken wire #02 from main manifold
harness plug to platform level down valve 4H-40.
Check continuity. Replace if defective.
10. Defective platform level down coil 4H-40. Check continuity and resistance through coil.
Replace if defective.