All Controls Except For Down Function Inoperative - Skyjack SJ3219 Service Manual

Section 4 – Troubleshooting Information

4.2-2 All Controls Except for Down Function Inoperative

1. Control Module CM1 display is broadcasting an
error message.
2. Loose or broken wire #19 from Control module
CM1 pin P5-1 to Motor contactor C1.
3. Loose or broken wire #00 from Motor Contactor
C1 to Battery (-).
4. Loose or broken wire #03A from Main
Disconnect switch S1 to Motor Contactor C1 N.O.
contact.
5. Motor Contactor C1 not functioning
6. Loose or broken B- cable wire #00 from batteries
to B- lug on Control Module CM1.
7. Loose or broken wire #M- from M lug on Control
Module CM1 to Motor DCM1.
8. Loose or broken wire #03B from B+ lug on
Control module CM1 to Motor DCM1.
9. Defective Motor DCM1.
10. External or internal fault detected by Control
Module CM1
212508ADA
79
Check Control Module display screen and follow
instructions to clear error.
Check continuity. Test for 24V Output voltage
between wire #19 and wire #00.
Use HMI Diagnostic menu to make sure Output
P5-1 signal is present.
Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check that Motor Contactor C1 coil is energized
when signal on wire #19 from Control Module CM1
pin #P5-1 to Motor Contactor C1 is enabled.
Check continuity between wire #03A and #03B on
the N.O. contact when Motor Contactor C1 coil is
energized (or operating a function that provides
B+ to Control Module CM1 pin #P5-1 from Motor
Contactor C1 on wire #03B).
Replace contactor if defective
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Check continuity. Replace if defective.
Supply the Motor DCM1 with 24 volt supply and a
B- across motor to check operation of Motor DCM1.
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.
Electrical System
SJ3215, SJ3219