All Controls Inoperative From Platform Control Console - Skyjack SJ3219 Service Manual

Electrical System
Scenario B:
*Emergency Lowering toggle switch S51 held in "down" position (as per electrical schematic)
▪
Loose or broken wire #00 from B- lug on
▪
Control Module CM1 to Emergency Lowering
switch S51.
Loose or broken wire #98B from Main
▪
Disconnect S1 to Emergency Lowering switch
S51.
Open or defective Emergency Lowering switch
▪
S51.
4. Loose or broken 2x wires #00D from Emergency
Lowering switch S51 to Holding valve coil 2H-13.
5. Loose or broken 2x wires #13 from Emergency
Lowering switch S51 to Holding valve coil 2H-13.
6. Loose or broken wire #00C from Control Module
CM1 pin #P2-8 to Holding valve coil 2H-13.
7. Defective isolation Diodes D00C, D13-1 and/
or D13-2 for redundant circuits for Emergency
Lowering.
8. Defective Lift cylinder Holding valve coil 2H-13.

4.2-7 All Controls Inoperative From Platform Control Console

1. Control Module CM1 display is broadcasting an
error message.
2. Loose or broken wire #03A to Circuit Breaker
CB1 or Circuit Breaker is open
3. Loose or broken wire #05 to Base Emergency
Stop switch S28.
4. Open or defective Base Emergency Stop switch
S28.
5. Incorrect selection of Base Key Switch S10.
6. Open or defective Base Key Switch S10.
SJ3215, SJ3219
Section 4 – Troubleshooting Information
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity between wire #00 and wire #00D
on switch, and
Check continuity between wire #98B and wire #13
on switch.
Replace switch if no continuity on both of these two
(2) contacts of switch
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check diodes and make sure connected securely.
Replace if defective.
Check continuity through coil. Replace if defective.
Check Control Module display screen and follow
instructions to clear error.
Check continuity to circuit breaker. Test circuit
breaker CB1. Replace if defective.
Check continuity. Replace if defective.
Close switch by pulling knob out and check switch.
Check continuity between wire #05 and wire #05A.
Replace switch if defective.
Check switch is on Platform selection
Operate and check switch.
Check continuity between wire #05A and wire #07
on switch (Platform Mode selected)
Replace if defective when operating switch.
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