Limit Override; Key Control - PROLEC Liftwatch Rail Operator's Manual

2.3 Limit override

When an overload or a slew or height limit condition occurs the machine hydraulics will be
physically disabled to prevent any further dangerous movements. Only those movements
that allow safer operation remain active. The radius cannot be increased, the load cannot
be raised, and all slewing is prevented.
To put the system into momentary OVERRIDE which will temporarily re-enable the machine
hydraulics, turn the spring loaded Limit Override Keyswitch. The override symbol will be displayed on
the screen, the external alarm will stay active, the red LED will flash and the external blue lamp will
switch off. Once the alarm condition has been corrected the RCI will automatically clear the override
request and revert to normal operation.
The key should be removed under normal use.

2.4 Key control

The key must be in the Lift mode position to access the lift mode menu. The lift mode menu
provides the facility to set a lifting point, select tandem lifting, select lift planning mode, or to enable
the NON-RCI mode used for basic excavator operations. See section 2.7
The key must be in the Set Limit position to access the limiting menu. The limiting menu provides
the facility to set and clear height and slew limits. See section 6.1 and 6.2
Once set the key switch should be returned to the 0 position and the key removed.
Liftwatch Rail Operators Manual 560386-000 Issue 1.2 © Prolec Ltd - Feb 2011
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