Service manual
SKYJACK, Page 7
SJIII Compact Series
143909
Section 4 - Troubleshooting Information Service and Maintenance
Electrical System (Continued)
12. Open or defective diode D14E-1
Check diode. Replace if defective. -
13. See 4.1-5 of this section for more troubleshooting information.
4.1-9 No Down Function from Platform or Base Control Console (ANSI/CSA only)
NOTE
Down function is not proportionally controlled.
1. Loose or broken wire #13 from base terminal block to down valve 2H-13 or holding valve 2H-13-1.
Check continuity. Replace if defective. -
2. Loose or broken wire #02 from base terminal block to down valve 2H-13 or holding valve 2H-13-1.
Check continuity. Replace if defective. -
3. Defective down valve 2H-13.
Check continuity through coil. Replace if defective. -
4. Defective lift cylinder holding valve 2H-13-1.
Check continuity through coil. Replace if defective. -
4.1-10 No Down Function from Platform or Base Control Console (CE only)
NOTE
Down function is not proportionally controlled.
1. Loose or broken wire #13 from base terminal block to CM1 control module pin P2-4.
Check continuity. Replace if defective. -
2. Defective down relay 28CR2 or Aux. down relay 28ECR2.
Check relay. Replace if defective. -
3. Loose or broken wire #02 from base terminal block to down relay 28CR2 or Aux. down relay
28ECR2.
Check continuity. Replace if defective. -
4. Loose or broken wire #13 from base terminal block to Aux. down relay 28ECR2.
Check continuity. Replace if defective. -
5. Loose or broken wire #13A from Aux. down relay 28ECR2 to down relay 28CR2.
Check continuity. Replace if defective. -
6. Loose or broken wire # 13B from down relay 28CR2 to down valve 2H-13B or holding valve
2H-13B-1.
Check continuity. Replace if defective. -
7. Defective down valve 2H-13B.
Check continuity through coil. Replace if defective. -
8. Defective lift cylinder holding valve 2H-13B-1.
Check continuity through coil. Replace if defective. -
9. Loose or broken wire #02 from holding valve 2H-13B-1 or down valve 2H-13B to base terminal
block.
Check continuity. Replace if defective. -
4.1-11 No Up Function from Base Control Console
1. Defective up/down switch S2.
Check switch. Replace if defective. -
2. Loose or broken wire #14E from up/down switch S2 to base terminal switch.
Check continuity. Replace if defective. -