JLG E450A Service And Maintenance Manual page 353

TILT MODULE FAILURE: NOT COMMUNICATING
There is a problem with the positrac/tilt module; the controller defaults to massively tilted and does not try to pre-
vent vehicle roll on the grade.
3/1 Flash code 3/1 indicates that a contactor did not close when energized.
LINE & DIRECTION CONTACTORS MISWIRED
When the line contactor was closed traction point A went high (and the capacitor bank charge did not increase to
battery supply) - this occurs if the line contactor coil wiring is swapped with that for a direction contactor coil.
OPEN-CIRCUIT FORWARD DIRECTION CONTACTOR OR TRACTION MOTOR
Traction point A did not go high when forward contactor was energized (this could be due to traction motor open-
circuit or a power wiring error).
OPEN-CIRCUIT LINE CONTACTOR OR TRACTION MOTOR
The capacitor bank charge did not increase to battery supply when line contactor was energized (this could be due
to a power wiring error).
OPEN-CIRCUIT REVERSE DIRECTION CONTACTOR
Traction point A did not go high when reverse contactor was energized (this could be due to traction motor open-
circuit or a power wiring error).
Flash code 3/2 indicates that a contactor did not open when energized.
3/2
WELDED LINE CONTACTOR
The capacitor bank charge did not decrease from battery supply when line contactor was deenergized (this could
be due to a power wiring error).
WARNING: If the line contactor is welded, the controller will not switch off when EMS or keyswitch is turned off.
Flash code 3/3 indicates that a contactor coil is short-circuited.
3/3
OVERLOADED VALVE SUPPLY-CHECK WIRING.
There is a high current draw from the valve supply when no valve is energized; this is probably due to a wiring error
at the ground module.
SHORT-CIRCUIT FORWARD CONTACTOR COIL
The forward contactor was not energized when required, due to coil overcurrent protection.
SHORT-CIRCUIT LINE CONTACTOR COIL
The line contactor was not energized when required, due to coil overcurrent protection.
SHORT-CIRCUIT REVERSE CONTACTOR COIL
The reverse contactor was not energized when required, due to coil overcurrent protection.
4/2 Flash code 4/2 indicates that the controller is over temperature.
CONTROLLER TOO HOT - PLEASE WAIT
The controller heatsink temperature reached 75 degrees. The controller is shut down until it cools to below 70
degrees.
4/4 Flash code 4/4 indicates problems with the battery supply.
BATTERY LOW
Battery voltage is below 40V. This is a warning - the controller does not shut down.
BATTERY TOO HIGH - SYSTEM SHUT DOWN
Battery voltage is above 62V.
EMS recycle required.
BATTERY TOO LOW - SYSTEM SHUT DOWN
Battery voltage is below 33V.
EMS recycle required.
6/6 Flash code 6/6 indicates problems with the CANbus.
48V PROTECTION TRIPPED - CHECK INTER-MODULE WIRING
The power module is not receiving acknowledgments from the platform or ground modules to transmitted data,
and the protection circuit which supplies the platform and ground modules has tripped. This is probably due to wir-
ing problems at the platform or ground module.
3121714
Table 6-8. Help Descriptions and Fault Flash Codes
SECTION 6 - JLG CONTROL SYSTEM
6-37