JLG 1850SJ Operation And Safety Manual page 57

7. Platform Overload Indicator (If Equipped)
Indicates the platform has been over-
loaded.
8. Boom Control System Warning Indicator
Indicates the platform is outside the oper-
ating area and operation of certain boom
functions may be disabled (i.e. lift, tele-
scope). Attempts to use the disabled
functions cause the indicator to flash and
an alarm to sound. Immediately return the platform to the
ground. If the indicator remains lit, a boom control system
fault or failure has been detected. If a failure is discovered,
the system must be repaired by JLG authorized service per-
sonnel before the machine can be used.
9. Boom Control System Calibrated Indicator
When the Boom Control System Test But-
ton is pushed, illuminates to indicate that
the Boom Control System is calibrated
properly.
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SECTION 3 - MACHINE CONTROLS AND INDICATORS
10. High Exhaust System Temperature (HEST)
Illuminates when exhaust temperature
reaches 1022° F (550° C).
11. Engine Error Indicator
The light indicates that the JLG Control Sys-
tem has detected an abnormal condition
with the engine (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) or is requesting a cleaning sequence
(Refer to Selective Catalytic Reduction in Section 4).
The system distress indicator light will illuminate for 2-3 sec-
onds when the key is positioned to the on position to act as
a self test.
– JLG Lift – 3-13