15 No Drive Or Steer When Platform Elevated; 16 High/Low Torque Inoperative - Skyjack SJ3220 Service Manual

Electrical System

4.2-15 No Drive or Steer when Platform Elevated

1. Control Module CM1 display is broadcasting an
error message.
2. Pothole protection bars not fully lowered.
3. Loose or broken wire #910 from Control Module
CM1 pin #P2-7 to pothole protection limit switch
LS1.
4. Defective pothole protection limit switch LS1.
5. Loose or broken wire #72 from pothole
protection limit switch LS1 to pothole protection
limit switch LS2.
6. Defective pothole protection limit switch LS2.
7. Loose or broken wire #71 from pothole
protection limit switch LS2 to Control Module
CM1 pin #P4-7.
8. External or internal fault detected by Control
Module CM1.

4.2-16 High/Low Torque Inoperative

1. Control Module CM1 display is broadcasting an
error message.
2. Loose or broken wire #08 from platform
Emergency Stop switch S4 to Torque switch S27.
3. Defective Torque switch S27.
SJ3220, SJ3226, SJ4720, SJ4726, SJ4732
Section 4 – Troubleshooting Information
Check Control Module display screen and follow
instructions to clear error.
Clear obstructions. Repair as needed.
Check continuity. Test for 24V Output voltage
between wire #910 and wire #902 at P6-4.
Use HMI Diagnostic menu to make sure output P2-7
supply is present.
Replace if defective.
Check switch.
Check continuity between wire #910 and wire #72
at switch.
Replace if no continuity when operating switch.
Check continuity. Replace if defective.
Check switch.
Check continuity between wire #72 and wire #71.
Replace if no continuity when operating switch.
Check continuity. Test for 24V Input voltage
between wire #71 and wire #02.
Use HMI Diagnostic menu to make sure input P4-7
signal is present.
Replace if defective.
Check Control Module display screen. Use
Diagnostic Menu to see switch and sensor status.
Correct trouble code as displayed. Replace module
if defective.
Check Control Module display screen and follow
instructions to clear error.
Check continuity. Replace if defective.
Check switch.
Check continuity between wire #08 and wire #18 at
switch.
Replace if no continuity when operating switch.
223198ABA
113