4.14.2 The elevating system should be operable
from a central jacking control station.
4.14.3 The jacking control station should have
the following:
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.1 audible and visual alarms for jacking system
overload and out-of-level. Units whose jacking systems are subject
to rack phase differential should also have audible and visual alarms
for rack phase differential; and
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.2 instrumentation to indicate:
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.2.1 the inclination of the unit on two horizontal
perpendicular axes;
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.2.2 power consumption or other indicators for
lifting or lowering the legs, as applicable; and
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.2.3 brake release status.
4.14.4 A communication system should be provided
between the central jacking control and a location at each leg.