JLG 680S, Service And Maintenance Manual

Page: 335 / 530

SECTION 4 - BOOM & PLATFORM
3121234 4-71
Diagnostic & Troubleshooting
If you are experiencing a problem that is not described here, see
your authorized dealer for service.
1. Check the configuration under the menu “MACHINE
SETUP

STOUCH/SKYGUARD” according to the actual
system installed on machine. Make sure recommended
configuration described is selected.
If SkyGuard does Not Function with sensor engaged.
AUTHORIZED TECHNICIAN OR OPERATOR IS REQUIRED TO CONDUCT AN OPER-
ATION CHECK OF SKYGUARD SENSOR DAILY.
Help menu or diagnostics menu is to be used to collect
the fault information.
Depending on configurations, diagnostics menu
will read:
Diagnostics->System->Skyguard switch
Diagnostics->System->STOUCH OR SG
Pressing to engage the SkyGuard sensor will change the
switch or relay to open/close status.
If the switch status stays in “Open” while the actual Sky-
Guard sensor is pressed, then the SkyGuard sensor may
have failed, it needs to be changed immediately.
2. If machine operation is not available:
Help menu or diagnostics menu is to be used to collect
the fault information.
Depending on configuration, diagnostics menu
will read:
Diagnostics->System->Skyguard switch
Diagnostics->System->STOUCH OR SG
Pressing to engage the SkyGuard sensor will change the
switch or relay to open/close status.
If the switch status states “Closed” regardless of sensor
activation status:
Power or ground wire is not making good contact and/
or may be loose or broken.
Both relays failed (low probability).
If the switch status is in disagreement, then one relay
may have failed or one relay isn't inserted into the
holder correctly. This may also be noticed since machine
will not be able to be operated.
Switch disagreement fault (2563) and SkyGuard switch
activation fault (0039) will be shown under
Help menu.
Table 4-2. SkyGuard Function Table
Main
Lift
Main Tele
In
Main Tele
Out
Main
Swing
Drive Forward Drive Reverse Basket
Level
Basket
Rotate
DOS
Enabled
DOS
Not
Enabled
DOS
Enabled
DOS
Not
Enabled
R C R R R C* R R C C
R = Indicates Reversal is Activated
C = Indicates Cutout is Activated
* Disregard when boom is in line and driving forward with or without steering and no other function active
Note: When Soft Touch is enabled with SkyGuard all functions are cut out only.