System Operation
The following is a list of procedures which are used to
operate the multiple features of the Rated Capacity
Limiter. Use these procedures in conjunction with the
previous display unit control descriptions.
System Self-Test
At start-up the system automatically performs a self test
after which all lamps, audible alarms, and digital dis-
plays will be functionally tested and all memory areas
checked for accuracy. If faults in the system are de-
tected during a test, the warning message area will
show the words SYSTEM FAULT. If the words SYSTEM
FAULT occur, press the Display/Select button to dis-
play the Calibration And Diagnostic screen. Through
the Calibration And Diagnostic screen, information can
be accessed about the fault condition by means of an
error code. Contact your local distributor for details of
the fault codes.
Note: If the batteries have been disconnected inter-
rupting power to the computer, the start-up time for
on-board computer systems will be longer than
normal.
System Bypass
In emergency situations, the Rated Capacity Limiter
computer can be bypassed. The computer is located
on the back of the operator’s cab. Refer to
Figure 1−70. There is a RCL Status keyswitch adja-
cent to the computer to bypass the system. Move the
key to the Bypass" position to bypass the system. For
emergency use while the system is bypassed, refer to
System Inoperative or Malfunctioning" that follows.
WARNING
The Microguard 534 is not operational when
the computer is bypassed. Bypass the
system in emergency situations only.
System Inoperative Or Malfunctioning
When operational aids are inoperative or malfunction-
ing, the following recommendations for continued use
of the crane should be followed or the crane should be
shutdown.
1. Steps shall be taken to schedule repairs and recal-
ibration immediately. The operational aids shall be
put back into service as soon as replacement
parts, if required, are available and the repairs and
recalibration can be carried out. Every reasonable
effort must be made to expedite the repairs and re-
calibration.
Figure 1−70
Rated Capacity Limiter Computer
1. RCL Status Keyswitch 2. Computer
1
2
2. When the rated capacity limiter is inoperative or
malfunctioning, the designated person responsi-
ble for supervising the lifting operations shall es-
tablish procedures for determining load weights
and shall ascertain that the weight of the load does
not exceed the crane ratings at the radius where
the load is to be handled.
3. When a boom angle or radius indicator is inopera-
tive or malfunctioning, the radius or boom angle
shall be determined by measurement.
4. When the anti-two block warning device is inopera-
tive or malfunctioning, the designated person re-
sponsible for supervising the lifting operations
shall establish procedures, such as assigning an
additional signal person, to furnish equivalent
protection. This does not apply when lifting per-
sonnel in load line supported baskets. Personnel
shall not be lifted in load line supported baskets
when the anti-two block devices are not function-
ing properly.
5. When a boom length indicator is inoperative or
malfunctioning, the designated person responsi-
ble for supervising the lifting operations shall es-
tablish the boom length at which the lift will be
made by actual measurement or markings on the
boom.
6. When a level indicator is inoperative or malfunc-
tioning, other means shall be used to level the
crane.
7. In situations where inconsistency exists, verified
weights, measured radii, boom lengths, and au-
thorized crane capacities must always take prece-
dence over indicator readings.
SkyAzúl, Equipment Solutions
