JLG 1100SB Operator Manual - Manual (Page 49)

SECTION 3 - MACHINE CONTROLS AND INDICATORS
3121264 – JLG Lift – 3-17
14. Boom Control System Warning Indicator
Indicates the platform is outside the operating area and
operation of certain boom functions may be disabled
(i.e. lift, telescope). Attempts to use the disabled func-
tions cause the indicator to flash and an alarm to sound.
Immediately return the platform to the ground. If the indi-
cator 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 personnel
before the machine can be used.