JLG M600 Service Manual - Manual (Page 181)

SECTION 6 - JLG CONTROL SYSTEM
3121813 – JLG Lift – 6-15
Table 6-5. Help Descriptions and Fault Flash Codes
Flash Code Description
No flash code is indicated for the following help messages; they are intended to hint at a possible problem if the vehicle is not behaving as
expected.
EVERYTHING OK
The “normal” help message in platform mode
GROUND MODE OK
The “normal” help message in ground mode
BATTERY LOW
Battery voltage is below 40V. This is a warning – the controller does not shut down (the low battery lamp will light below 45V and flash
below 40V.
BRAKES RELEASED
Indicates manual brake release in ground mode
DRIVING AT CREEP - TILTED
Drive speed is limited to creep because the vehicle is tilted.
FSW OPEN
A drive or boom function has been selected but footswitch is open.
PUMP MOTOR AT CURRENT LIMIT
Pump current has reached controller current limit or safe operating area limit.
RUNNING AT CREEP - CREEP SWITCH OPEN
All function speeds are limited to creep because the creep switch is open.
RUNNING AT CREEP - TILTED & ABOVE ELEVATION
All function speeds are limited to creep because the vehicle is tilted and above elevation.
RUNNING AT CUTBACK - ABOVE ELEVATION
Drive speed is limited to cutback because the vehicle is above elevation.
TESTS ACTIVE - RECYCLE EMS TO END
The system tests have been activated; normal vehicle operation is not allowed.
TILT MODULE FAILURE: BAD TILT SENSOR
There is a problem with the tilt sensor in the positilt module; the controller defaults to massively tilted and does not try to prevent vehicle
roll on the grade.
TRACTION MOTOR AT CURRENT LIMIT
Traction current has reached controller current limit or safe operating area limit.
2/1 Flash code 2/1 indicates problems with footswitch.
FSW FAULTY
The two footswitch signals do not agree.
EMS recycle required.
STARTUP
Neither EMS input is active - the system is just switching on or is discharging the capacitor bank.
A welded line contactor might also cause this.