Skyjack SJ4726 Service Manual

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SJ3220, SJ3226, SJ4720, SJ4726, SJ4732223198ABA
Section 4 – Troubleshooting Information Electrical System
4.2-3 All Controls Inoperative From Base Control Console
1. Control Module CM1 display is broadcasting an
error message.
Check Control Module display screen and follow
instructions to clear error.
2. Loose or broken wire #03A to circuit breaker
CB1 or circuit breaker is open.
Check continuity to circuit breaker. Test circuit
breaker CB1. Replace if defective.
3. Loose or broken wire #05 to Base Emergency
Stop switch S28.
Check continuity. Replace if defective.
4. Open or defective Base Emergency Stop switch
S28.
Close switch by pulling knob out and check switch.
Replace if defective.
5. Loose or broken wire #05A from Base
Emergency Stop switch S28 to Base Key switch
S10.
Check continuity. Replace if defective.
6. Open or defective Base Key Switch S10.
Check switch.
Check continuity between wire #05A and wire
#08C on switch (when selected on Base or
Platform)
Check continuity between wire #05A and wire #07
on switch (when selected on Platform only)
Check continuity between wire #05A and wire #10
on switch (when selected on Base only)
Replace switch if no continuity when operating
switch.
7. Loose or broken wire #08C from Base Key switch
S10 to Control Module CM1 pin #P3-1 (enable
signal).
Check continuity. Test for 24V Input voltage
between wire #08C and wire #02.
Use HMI Diagnostic menu to make sure input P3-1
signal is present.
Replace if defective.
8. Loose or broken wire #10 from Base Key switch
S10 to Base Lift/Lower switch S2.
Check continuity. Replace if defective.
9. Loose or broken #10 wire from Base Key switch
S10 to Control Module CM1 pin #P3-5 (Base
signal).
Check continuity. Test for 24V Input voltage
between wire #10 and wire #02.
Use HMI Diagnostic menu to make sure input P3-5
signal is present.
Replace if defective.
10. Open or defective Lift/Lower switch S2.
Check switch.
Check continuity between wire #10 and wire #14A
on switch (when selected on Up)
Check continuity between wire #10 and wire #13A
on switch (when selected to Dn)
Replace switch if no continuity when operating
switch.

Skyjack SJ4726 Specifications

General

Brand	Skyjack
Model	SJ4726
Category	Scissor Lifts
Language	English