SKYJACK, Page 6 SJIII Conventional Series
143911
Section 4 - Troubleshooting InformationService and Maintenance
Electrical System (Continued)
4.1-5 No Drive or Up Function from Platform or Base Controls (CE only)
1. Defective tilt relay 28CR1 or Aux. tilt relay 28ECR1.
Check relay. Replace if defective. -
2. Loose or broken wire #02 from base terminal block to tilt relay 28CR1 or Aux. tilt relay 28ECR1.
Check continuity. Replace if defective. -
3. Loose or broken wire #28 from CM1 control module pin P3-4 to tilt relay 28CR1.
Check continuity. Replace if defective. -
4. Loose or broken wire #28E from CM1 control module pin P3-6 to Aux. tilt relay 28ECR1.
Check continuity. Replace if defective. -
5. Loose or broken wire #19 from base terminal block to Aux. tilt relay 28ECR1.
Check continuity. Replace if defective. -
6. Loose or broken wire #19A from Aux. tilt relay 28ECR1 to tilt relay 28CR1.
Check continuity. Replace if defective. -
7. Loose or broken wire #19B from tilt relay 28CR1 to base terminal block.
Check continuity. Replace if defective. -
8. Loose or broken wire #19B from base terminal block to motor contactor C1.
Check continuity. Replace if defective. -
4.1-6 No Down or Reverse Only Function from Platform Controls
1. Loose or broken wire “A” from proportional controller S7 to lift/drive switch S3.
Check continuity. Replace if defective. -
2. Lift/Drive switch S3 defective.
Check switch. Replace if defective. -
3. Defective PWM card on joystick S7.
Check joystick card. Replace if defective. -
4. Loose or broken wire #13 down or #15 reverse from lift/drive switch S3 to base terminal block.
Check continuity. Replace if defective. -
4.1-7 No Up or Forward Only Function from Platform Control Console
1. Loose or broken wire “B” from proportional controller S7 to lift/drive switch S3.
Check continuity. Replace if defective. -
2. Lift/Drive switch S3 defective.
Check switch. Replace if defective. -
3. Defective PWM card on joystick S7.
Check joystick card. Replace if defective. -
4. Loose or broken wire #14 up or #16 forward from lift/drive switch S3 to base terminal block.
Check continuity. Replace if defective. -
4.1-8 No Up Function from Platform or Base Control Console
1. Loose or broken wire #14 from base terminal block to up valve coil 3H-14.
Check continuity. Replace if defective. -
2. Defective up valve coil 3H-14.
Check continuity through coil. Replace if defective. -
3. Open diode D14.
Check diode. Replace if defective. -
4. Open diode D21A (ANSI/CSA) or D21 (CE).
Check diode. Replace if defective. -
5. Machine not level. (Above high speed limit switch)
Use on level surface. -
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