JLG 600A_AJ Operator Manual - Manual (Page 56)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3-20 – JLG Lift – 3121204
7. Malfunction Indicator
On all machines prior to S/N 48907 and machines with a
Deutz engine prior to S/N 64249, the light turns on and
an alarm sounds when machine’s power system
requires immediate service. Any of the following condi-
tions will turn on light and alarm: low engine oil pres-
sure, high engine coolant temperature, clogged engine
air filter, low alternator output, clogged hydraulic oil
return filter, or clogged charge pump filter.
On machines with Ford engines from S/N 48907 to S/N
64249, the light indicates that the Engine Control Sys-
tem has detected a malfunction and a Diagnostic Trou-
ble Code has been set in the system memory.
On machines after S/N 64249, the light indicates that the
JLG Control System has detected an abnormal condi-
tion and a Diagnostic Trouble Code has been set in the
system memory.
Refer to the Service Manual for instructions concerning
the trouble codes and trouble code retrieval.
The malfunction indicator light will illuminate for 2-3 sec-
onds when the key is positioned to the on position to act
as a self test.
8. AC Generator (Green)
Indicates the generator is in operation.
9. Soft Touch Indicator (If Equipped)
Indicates the Soft Touch bumper is against an object. All
controls are cut out until the override button is pushed,
at which time controls are active in the Creep mode.
10. Creep Speed Indicator
When the Function Speed Control is turned to the creep
position, the indicator acts as a reminder that all func-
tions are set to the slowest speed.
11. Drive Orientation Indicator
When the boom is swung beyond the rear drive tires or
further in either direction, the Drive Orientation indicator
will illuminate when the drive function is selected. This is
a signal for the operator to activate the Drive Orientation
Override Switch and verify the drive control direction is
correct.