Published 01-15-2016, Control # 526-01 3-41
RT540E OPERATOR MANUAL OPERATING CONTROLS AND PROCEDURES
RCL Emergency Override Switch (Non-CE
Certified Cranes)
The RCL system, when programmed accurately, will lockout
nearly every crane function—boom up/down, telescope
extend/retract, hoist up and swing left/right—when a lift is
attempted at or above the crane's capacity or when a two-
block condition exists. Only the particular function(s) that
cause the existing lockout condition are blocked. Locking out
these functions prevents the overload or two-block condition
from worsening.
The RCL emergency override switch (2) (Figure 3-17) is a
key operated switch that is located inside the operator cab
on the panel assembly behind the seat. When actuated
(turned clockwise), the switch will override and prevent the
RCL from locking out craning functions (Third Wrap Limit and
Anti Two-Block) should an overload condition occur. Turn the
key counterclockwise to bypass the Anti Two-Block Switch,
Telescope extend/retract, 3rd Wrap Indicator (hoist lowering
limit) and Boom up/down.
Overriding the RCL with this switch should only be done in
the case of an emergency or when servicing the boom.
A flashing light on the RCL display indicates the switch has
been activated.
RCL Emergency Override Switch and
Indicator (CE Certified Cranes)
The RCL system, when programmed accurately, will lockout
nearly every crane function—boom up/down, telescope
extend/retract, hoist up and swing left/right—when a lift is
attempted at or above the crane's capacity or when a two-
block condition exists. Only the particular function(s) that
cause the existing lockout condition are blocked. Locking out
these functions prevents the overload or two-block condition
from worsening.
The RCL emergency override switch is located inside a key-
locked single-door enclosure (1) (Figure 3-18) that is
attached to the outside rear of the operator's cab. The switch
is a two-position momentary rocker switch that, when
actuated, will override and prevent the RCL, for a period of
30 minutes, from locking out craning functions (boom down,
telescope extend, third wrap limit and hoist up) should an
overload condition occur.
The other RCL emergency override switch (19) (Figure 3-6)
is a key operated switch that is located inside the operator
cab below the CCS screen, in front of the Emergency Stop
Switch. When actuated (turned clockwise), the switch will
override and prevent the RCL from locking out craning
functions (Third Wrap Limit and Anti Two-Block) should an
overload condition occur. Turn the key counterclockwise to
bypass the Anti Two-Block Switch, Telescope extend/retract,
3rd Wrap Indicator (hoist lowering limit) and Boom up/down.
Overriding the RCL with this switch should only be done in
the case of an emergency or when servicing the boom.
Upon activation, all craning function movements are reduced
to 15% of their normal maximum speeds.
The RCL override function is automatically cancelled after 30
minutes. The RCL override function can also be cancelled by
the operator by either pressing the RCL emergency override
switch a second time or by turning off the engine. However,
turning off crane functions does not disable the RCL
override.
NOTE: Before powering up crane, ensure that the RCL
Override Switch is in the Normal (not Override)
position to avoid an error code.
WARNING
Loss of RCL Monitoring Hazard!
The RCL Emergency Override switch is to be used in
emergency situations only.
Do not operate the crane with the RCL overridden during
normal operations.
When the RCL is overridden always have a helper on the
ground to signal you.
WARNING
Loss of RCL Monitoring Hazard!
The RCL Emergency Override Switch is to be used in
emergency situations only.
Do not operate the crane with the RCL overridden during
normal operations.
When the RCL is overridden, always have a helper on the
ground to signal you.
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