JLG 723A Service Manual - Manual (Page 162)

Electrical System
9.54 L2906H, 2906H, 3507H, 619A, 723A, 29.6LP, 29.6, 35.7
APU SWITCH INPUT
INVALID – INPUT
HIGH AT POWER
UP 2116 1 Still allow APU function request.
If J7-4 Boom Angle reading is less
than 10° and the J3-8 Boom
Retracted input is HIGH, cutout the
Main Lift Up and Telescope Out
functions.
If a platform is configured as
ENABLED and the UGM detects
J4-16 Auxiliary Power Unit (APU)
Enable is HIGH at system power up.
The input
goes LOW for
a period of at
least 1
second.
PLATFORM
JOYSTICK NOT IN
NEUTRAL
POSITION AT
POWER UP 2117 1 Ignore platform lift and telescope
function requests from the platform
joystick.
If the PLATFORM STATION is
active and a platform is configured
as ENABLED and a platform is
detected as attached and the
platform joystick is not detected to
be in the neutral position at system
power up.
Joystick is
detected to be
in neutral
position.
ENGINE
PRE-HEAT
PREVENTED –
INPUT HIGH AT
POWER UP 2118 1 Ignore engine pre-heat function
request.
If the UGM detects J4-20 Engine
Pre-Heat or the platform module
input J1-23 Engine Pre-heat is
HIGH at system power up.
The input
goes LOW for
a period of at
least 1
second.
FRAME LEVEL
RIGHT INPUT –
INVALID SIGNAL 2119 1 Deactivate and inhibit J2-5 Frame
Level Right Valve.
Deactivate and inhibit J2-7 Frame
Level Left Valve.
Deactivate and inhibit J1-3
Stabilizer and Frame Level Speed
Valve (if applicable) as it relates to
frame leveling functions only.
If J4-17 Frame Leveling Right is
HIGH at power up.
Power cycled.
FRAME LEVEL
LEFT INPUT –
INVALID SIGNAL 2120 1 Deactivate and inhibit J2-5 Frame
Level Right Valve.
Deactivate and inhibit J2-7 Frame
Level Left Valve.
Deactivate and inhibit J1-3
Stabilizer and Frame Level Speed
Valve (if applicable) as it relates to
frame leveling functions only .
If J4-9 Frame Leveling Left is HIGH
at power up.
Power cycled.
HYDRAULIC QUICK
CONNECT INPUT –
INVALID
SIGNAL 2121 1 Deactivate output J1-23 Hydraulic
Quick Connect Valve.
Ignore hydraulic quick connect
function requests .
Deactivate output J2-9 Auxiliary
Function-A Valve until the cabin’s
joystick is in the neutral position
and the S4 switch is OFF and J1-23
is confirmed to be deactivated.
Deactivate output J2-20 Auxiliary
Function-B Valve until the cabin’s
joystick is in the neutral position
and the S4 switch is OFF and J1-23
is confirmed to be deactivated.
If hydraulic quick connect feature is
configured in the MACHINE SETUP
menu and J7-35 Hydraulic Quick
Connect ON is HIGH at power up or
J3-10 Hydraulic Quick Connect
OFF is LOW at power up or J7-35
matches the state of input J3-10 for
0.5 seconds.
Power cycled.
Message Fault
Code
Indicators Other Actions Taken Trigger for Fault Latch Until