No Up Function From Base Control Console - Skyjack SJ3220 Service Manual

Electrical System
11. Loose or broken #14A wire from Lift/Lower
switch S2 to Control Module CM1 pin #P4-5 (Up
signal).
12. Loose or broken #13A wire from Lift/Lower
switch S2 to Control Module CM1 pin #P4-4 (Dn
signal).
13. External or internal fault detected by Control
Module CM1.

4.2-4 No Up Function from Base Control Console

1. Control Module CM1 display is broadcasting an
error message.
2. Open or defective Lift/Lower switch S2.
3. Loose or broken wire #14A from Lift/Lower
switch S2 to Control Module CM1 pin #P4-5 (Up
signal).
4. Loose or broken wire #14 from Control Module
CM1 pin #P5-5 to Up valve coil 3H-14.
5. Loose or broken wire #00 from Battery (-) to Up
valve coil 3H-14.
6. Defective up valve coil 3H-14.
SJ3220, SJ3226, SJ4720, SJ4726, SJ4732
Section 4 – Troubleshooting Information
Check continuity. Test for 24V Input voltage
between wire #14A and wire #02.
Use HMI Diagnostic menu to make sure input P4-5
signal is present
Replace if defective.
Check continuity. Test for 24V Input voltage
between wire #13A and wire #02.
Use HMI Diagnostic menu to make sure input P4-4
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 switch.
Check continuity between wire #10 and wire #14A
on switch. (Up Mode)
Replace switch if no continuity when operating
switch.
Check continuity. Test for 24V Input voltage
between wire #14A and wire #02.
Use HMI Diagnostic menu to make sure input P4-5
signal is present.
Replace if defective.
Check continuity. Test for 24V Output voltage
between wire #14 and wire #02.
Use HMI Diagnostic menu to make sure output P5-5
signal is present.
Replace if defective.
Check continuity. Replace if defective.
Check continuity through coil. Replace if defective.
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