JLG 740AJ, Service And Maintenance Manual

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SECTION 4 - BOO M & PLATFOR M
3121160 4-67
UMS Sensor Not Calibrated Message
8/1 UMS SENSOR NOT CALIBRATED.
If the control system detects a sensor out of range condition or a
not calibrated fault with the UMS angle sensor, the control sys-
tem shall report a fault and disable Tower Lift Down and activate
the ground boom malfunction indicator lamp, upright tilted
lamp and platform alarm continually.
If the control system detects that either angle sensor has not
been calibrated, the ground boom malfunction lamp will flash at
a 3 Hz rate until the system is calibrated or disabled.
Solution:
• Calibrate sensor.
UMS Sensor Faulted
8/1 UMS SENSOR FAULTED
If the system detects that the UMS sensor frequency outside the
100Hz +/- 5Hz range or the duty cycle is outside 50% +/- 21%
range the control system shall report a fault.
Solution:
• Inspect wire harness going to the sensor and UMS module.
• Inspect sensor mounting.
• Replace sensor.
Tower Lift Down Output Short to Ground or Open
Circuit
8/1 TOWER LIFT DOWN OUTPUT SHORT TO GROUND OR OPEN
CIRCUIT.
Short to Ground or open circuit has been detected on the Tower
Lift Down output.
Solution:
• Inspect harness and valve.
Tower Lift Down Output Short to Battery
8/1 TOWER LIFT DOWN OUTPUT SHORT TO BATTERY
Short to battery has been detected on the Tower Lift Down out-
put.
Solution:
• Inspect harness and valve.
Platform Indicator Output Short to Ground or Open
Circuit
8/1 PLATFORM INDICATOR OUTPUT SHORT TO GROUND OR
OPEN CIRCUIT.
Short to Ground or open circuit has been detected on the Plat-
form Indicator output.
Solution:
• Inspect harness.
Platform Indicator Output Short to Battery
8/1 PLATFORM INDICATOR OUTPUT SHORT TO BATTERY.
Short to battery has been detected on the Platform Indicator
output.
Solution:
• Inspect harness.
Ground Indicator Output Short to Ground
8/1 GROUND INDICATOR OUTPUT SHORT TO GROUND OR OPEN
CIRCUIT.
Short to Ground or open circuit has been detected on the
Ground Indicator output.
Solution:
• Inspect harness.
Ground Indicator Output Short to Battery
8/1 GROUND INDICATOR OUTPUT SHORT TO BATTERY.
Short to battery has been detected on the Ground Indicator Out-
put.
Solution:
• Inspect harness.
Turntable Sensor Not Calibrated Message
8/1 TURNTABLE SENSOR NOT CALIBRATED.
If the control system detects that the Chassis Tilt sensor is not
calibrated or there is an internal fault with the sensor, the control
system shall disable Tower Lift Down and activate the ground
boom malfunction indicator lamp, upright tilted lamp and plat-
form alarm continually.
If the control system detects that either angle sensor has not
been calibrated, the ground boom malfunction lamp will flash at
a 3 Hz rate until the system is calibrated or disabled.
Solution:
• Calibrate sensor.