JLG G12-55A Service Manual - Manual (Page 184)

Electrical System
9-42 G10-55A, G12-55A
9.14 ENGINE INDICATOR LAMPS - PERKINS
Warning
Lamp
Shutdown
Lamp
Lamp State Lamp Indication Engine State
ON ON Bulb Check When the ignition is turned on, the
EMS shall illuminate each bulb for
2 seconds and extinguish them
afterwards Key on, but engine has
yet to be cranked
OFF OFF No Faults Present With both lamps off whilst engine is
running then are no currently active
warnings, diagnostics or events Engine is running with no
detected faults
ON OFF Active Diagnostic Should the warning lamp illuminate
during engine running, this
indicates that an Active diagnostic
(Electrical fault) is present Engine is running
normally, but has one or
more faults with engine
management system
ON FLASH Derate
(Invoked by Active
Diagnostic)
Should the warning lamp illuminate
and the shutdown lamp flash
during engine running, this
indicates that an Active diagnostic
(Electrical fault) is present. The
diagnostic is sufficiently serious to
invoke engine derate Engine is running, but has
one or more Active
diagnostic events that
have initiated engine
derate
FLASH OFF Warning
(Warning only)
Should the warning lamp flash
during engine running, this
indicates that one or more of the
engine protection strategy warning
values have been exceeded, but
not to a level that will invoke Derate
or Shutdown Engine is running
normally, but has one or
more monitored engine
parameters outside of the
acceptable range
FLASH FLASH Derate
(Warning and
Derate)
Should both the Warning Lamp
and Shutdown Lamp flash during
engine running, this indicates that
one, or more of the engine
protection strategy values have
been exceeded beyond the level
required to invoke engine derate Engine is running, but
one or more of the
monitored engine
parameters has gone
beyond that of warning
only and has now
exceeded those set for
engine derate
ON ON Engine Shutdown Should both the Warning Lamp
and Shutdown Lamp illuminate
during engine running this
indicates that either:
1. One or more of the engine
protection strategy shutdown
values has been exceeded
2. A serious Active diagnostic
has been detected
Shortly after (time duration to be agreed)
engine will shutdown
Engine is either shutdown
or shutdown is imminent,
one of more monitored
engine parameters have
gone beyond that of
warning or derate and
have now exceeded
those set for engine
shutdown, or a serious
Active diagnostic has
been detected