JLG M600 Service Manual - Manual (Page 196)

SECTION 6 - JLG CONTROL SYSTEM
6-30 – JLG Lift – 3121813
Table 6-11. System Test Messages
RUNNING Initial display when system test is run; certain “critical” checks are made. Problems which can be reported include:
ONLY 1 ANALYZER!
Do not connect two Analyzers while running the system test.
BAD POWER WIRING
The capacitor bank is not charged or pump point A is low or traction point A is high or low.
Check all power wiring.
LINE CONT WELDED
The capacitor bank is at battery voltage.
Check line contactor.
Check all power wiring.
BATTERY TOO LOW
The system test cannot run with battery voltage below minimum.
BATTERY TOO HIGH
The system test cannot run with battery voltage above maximum.
CHECK CAN WIRING
The system test can’t run in platform mode unless data is being received from the platform, ground & positrac/tilt
modules.
The system test cannot run in ground mode unless data is being received from the ground and positrac/tilt modules.
CHECK LEFT SPD.
There is an open- or short- circuit in the left speed encoder wiring.
Check left speed encoder.
CHECK RIGHT SPD.
There is an open- or short- circuit in the right speed encoder wiring.
Check right speed encoder.
CHECK SHUNT
The traction current measurement is open-circuit.
Check wiring between power module and contactor panel.
BAD PUMP WIRING
Pump point A is not high, probably caused by an open-circuit pump motor or wiring.
Check all power wiring. Check pump motor.
BAD POWER MODULE
An internal problem was detected in the power module.
BAD POWER WIRING
Traction point A is high, probably caused by incorrect traction motor wiring.
Check all power wiring. Check traction motor.
HIGH TILT ANGLE
The vehicle is very tilted, or the tilt sensor has been damaged.
Check tilt sensor.
HOT POWER MODULE
The heatsink temperature exceeds 75C; this is only a warning.
BAD I/O PORTS
The controller detected a problem with its internal circuits at switchon.
If other problems are also detected, the controller may need replacing.
SUSPECT EEPROM
The controller detected a problem with its EEPROM stored personality settings at switch on.
Check and, if necessary correct, all personality settings.
WAIT:CAPBANK HI
This message can be displayed if the system test is run shortly after the vehicle was used; after a short wait, it should
clear.
OPEN FSW
In platform mode, the footswitch must be open at the start of the test.
CLOSE FSW
In platform mode, the footswitch must be closed when this message is displayed; the footswitch MUST BE KEPT
CLOSED during the valve & contactor tests.
BAD FSW
The two footswitch signals are not changing together, probably because one is open-circuit. One footswitch signal
(“FSW1”) is routed to the power module, the other (“FSW2”) is routed to the platform module. Check footswitch &
wiring.