JLG LSS Boom - Manual (Page 37)

SECTION 2 - SERVICE - ENGINE POWERED BOOM LIFTS
3124287 – JLG Lift – 2-15
The Ground Audible Warning
fails to sound, but the Platform
Audible Warning sounds prop-
erly. The Host Control System’s Ground Alarm is missing or improperly installed. Verify that the
device is mounted. Verify wiring from the Main Terminal Box and Ground Module according
to the proper Host Control System documentation. The Ground Alarm is energized from J2-
27 on the Ground Module (approximately 12V). Ensure that the ground termination is
proper (0V).
Controls remain functional at
the Ground Control position
during an overload, or when
simulated by unplugging a
Shear Beam from the LSS
Module. The Control at the
Platform Control position are
prevented when using the
engine, but not when using the
Auxiliary Power Unit. The Host Control System is configured to prevent platform controls only in the event of
overload (as required for EN280 compliance). Alternately, the Host Control System can be
configured to prevent ground and platform controls for country- or customer-specific cir-
cumstances.
Plug the JLG Analyzer into the LSS Module’s connection and enter the Access Level 1
password (33271). Proceed to the MACHINE SETUP, LOAD sub-menu. Set this parameter
to “2=CUTOUT PLT” to prevent platform controls in the event of overload. Set this parame-
ter to “3=CUTOUT ALL” to prevent platform and ground controls in the event of overload.
When the Capacity Select
switch is set for 750lbs/1000lbs
(340kg/450kg), Visual and
Audible Overload Warnings
sound and controls are pre-
vented when the platform is
loaded beyond 500lbs (230kg).
Alternately, the Visual and
Audible Overload Warnings do
not sound and controls are not
prevented when the platform is
loaded beyond 500lbs (230kg)
but the Capacity Select switch
is set for 500lbs (230kg). (Dual
Capacity vehicles only). There is a malfunction associated with the Capacity Select signal between the Host Control
System and LSS Module. This signal is controlled by the Host Control System and is an
input to the LSS Module. When the Capacity Select switch is set to 500lbs (230kg), this sig-
nal is de-energized (0V). The signal is energized (12V) when the Capacity Select switch is
set to 750lbs/1000lbs (340kg/450kg). This signal will be connected to J1-8 on the LSS Mod-
ule for vehicles that carry up to 750lbs (340kg), and J1-9 for vehicles that carry up to
1000lbs (450kg).
1. Observe operation of the Platform Console Box’s Capacity Indicator Lamps. Place
the boom in the transport position (fully stowed) and center the Jib Plus (if
equipped) to enable selection of both capacities. Set the keyswitch to the Platform
position and power-up. When the Capacity Select switch on the Platform Console
Box is in the 500lbs (230kg) position, ensure that the 500lbs (230kg) Indicator Lamp
is lit. When the Capacity Select switch is in the 750lbs/1000lbs (340kg/450kg) posi-
tion, ensure that the 750lbs/1000lbs (340kg/450kg) Indicator Lamp is lit. If either
does not occur, ensure that J1-21 on the Platform Module is de-energized (0V)
when the Capacity Select switch is in the 500lbs (230kg) position, and energized
(12V) when the switch is in the 750lbs/1000lbs (340kg/450kg) position. Ensure that
J2-12 on the Platform Module is energized (12V) when the Capacity Select switch is
in the 500LBS position. Ensure that J2-13 on the Platform Module is energized
(12V) when the Capacity Select switch is in the 750lbs/1000lbs (340kg/450kg) posi-
tion. Finally, is may be necessary to consult documentation for the Host Control
System to determine if another safety interlock is preventing the vehicle from enter-
ing the 750lbs/1000lbs (340kg/450kg) mode.
2. Remove the J1 (Grey) connector from the LSS Module and measure voltage on this
signal (J1-8 for 750lbs [340kg] or J1-9 for 1000lbs [450kg]). Plug the JLG Analyzer
into the LSS Module’s connection and proceed to DIAGNOSTICS, SYSTEM. The
750# CAPACITY display will indicate “ON” when J1-8 is energized (12V) and “OFF”
when J1-8 is de-energized (0V). The 1000# (450kg) CAPACITY display will indicate
“ON” when J1-9 is energized (12V) and “OFF” when J1-9 is de-energized (0V). If the
LSS Module fails to respond properly to signals on J1-8 or J1-9, then the LSS Mod-
ule is suspect (substitute to determine cause of failure).
Table 2-4. LSS Troubleshooting Chart - Host System Functionality
Difficulty Possible Resolution